Copyright © 2024 World Wide Web Consortium. W3C® liability, trademark and permissive document license rules apply.
WebDriver is a remote control interface that enables introspection and control of user agents. It provides a platform- and language-neutral wire protocol as a way for out-of-process programs to remotely instruct the behavior of web browsers.
Provided is a set of interfaces to discover and manipulate DOM elements in web documents and to control the behavior of a user agent. It is primarily intended to allow web authors to write tests that automate a user agent from a separate controlling process, but may also be used in such a way as to allow in-browser scripts to control a — possibly separate — browser.
This section describes the status of this document at the time of its publication. A list of current W3C publications and the latest revision of this technical report can be found in the W3C technical reports index at https://www.w3.org/TR/.
This document was published by the Browser Testing and Tools Working Group as a Working Draft using the Recommendation track.
Publication as a Working Draft does not imply endorsement by W3C and its Members.
This is a draft document and may be updated, replaced or obsoleted by other documents at any time. It is inappropriate to cite this document as other than work in progress.
This document was produced by a group operating under the W3C Patent Policy. W3C maintains a public list of any patent disclosures made in connection with the deliverables of the group; that page also includes instructions for disclosing a patent. An individual who has actual knowledge of a patent which the individual believes contains Essential Claim(s) must disclose the information in accordance with section 6 of the W3C Patent Policy.
This document is governed by the 03 November 2023 W3C Process Document.
This section is non-normative.
The WebDriver standard attempts to follow a number of design goals:
This specification is derived from the popular Selenium WebDriver browser automation framework. Selenium is a long-lived project, and due to its age and breadth of use it has a wide range of expected functionality. This specification uses these expectations to inform its design. Where improvements or clarifications have been made, they have been made with care to allow existing users of Selenium WebDriver to avoid unexpected breakages.
The largest intended group of users of this specification are software developers and testers writing automated tests and other tooling, such as monitoring or load testing, that relies on automating a browser. As such, care has been taken to provide commands that simplify common tasks such as typing into and clicking elements.
WebDriver provides a mechanism for others to define extensions to the protocol for the purposes of automating functionality that cannot be implemented entirely in ECMAScript. This allows other web standards to support the automation of new platform features. It also allows vendors to expose functionality that is specific to their browser.
As well as sections marked as non-normative, all authoring guidelines, diagrams, examples, and notes in this specification are non-normative. Everything else in this specification is normative.
Conformance requirements phrased as algorithms or specific steps may be implemented in any manner, so long as the end result is equivalent. Algorithms in this document are typically written with readability, rather than performance, in mind.
In equations, all numbers are integers, addition is represented by “+”, subtraction by “−”, division by “÷”, and bitwise OR by “|”. The characters “(” and “)” are used to provide logical grouping in these contexts.
The mathematical function min(value, value[, value]) returns the smallest item of two or more values. Conversely, the function max(value, value[, value]) returns the largest item of two or more values.
The mathematical function floor(value) produces the largest integer, closest to positive infinity, that is not larger than value.
A Universally Unique Identifier (UUID) is a 128 bits long URN that requires no central registration process. Generating a UUID means Creating a UUID From Truly Random or Pseudo-Random Numbers, and converting it to the string representation. [RFC4122]
The Unix Epoch is a value that approximates the number of seconds that have elapsed since the Epoch, as described by The Open Group Base Specifications Issue 7 section 4.15 (IEEE Std 1003.1).
An integer is a Number that is unchanged under the ToInteger operation.
The initial value of an ECMAScript property is the value defined by the platform for that property, i.e. the value it would have in the absence of any shadowing by content script.
The browser chrome is a non-normative term to refer to the representation through which the user interacts with the user agent itself, as distinct from the accessed web content. Examples of browser chrome elements include, but are not limited to, toolbars (such as the bookmark toolbar), menus (such as the file or context menu), buttons (such as the back and forward buttons), door hangers (such as security and certificate indicators), and decorations (such as operating system widget borders).
The webdriver-active flag is set to true when the user agent is under remote control. It is initially false.
WebIDL
Navigator includes NavigatorAutomationInformation
;
The NavigatorAutomationInformation
interface
should not be exposed on WorkerNavigator
.
Returns true if webdriver-active flag is set, false otherwise.
The WebDriver protocol consists of communication between:
The local end represents the client side of the protocol, which is usually in the form of language-specific libraries providing an API on top of the WebDriver protocol. This specification does not place any restrictions on the details of those libraries above the level of the wire protocol.
For remote ends the standard defines two broad conformance classes, known as node types:
All remote end node types must be black-box indistinguishable from a remote end, from the point of view of local end, and so are bound by the requirements on a remote end in terms of the wire protocol.
The readiness state of a remote end indicates whether it is free to accept new connections. It must be false if the implementation is an endpoint node and the list of active HTTP sessions is not empty, or otherwise if the remote end is known to be in a state in which attempting to create new sessions would fail. In all other cases it must be true.
If the intermediary node is a multiplexer that manages multiple endpoint nodes, this might indicate its ability to purvey more sessions, for example if it has hit its maximum capacity.
WebDriver remote ends must provide an HTTP compliant wire protocol where the endpoints map to different commands.
As this standard only defines the remote end protocol, it puts no demands to how local ends should be implemented. Local ends are only expected to be compatible to the extent that they can speak the remote end's protocol; no requirements are made upon their exposed user-facing API.
Various parts of this specification are written in terms of step-by-step algorithms. The details of these algorithms do not have any normative significance; implementations are free to adopt any implementation strategy that produces equivalent output to the specification. In particular, algorithms in this document are optimized for readability rather than performance.
Where algorithms that return values are fallible, they are written in terms of returning either success or error. A success value has an associated data field which encapsulates the value returned, whereas an error value has an associated error code.
When calling a fallible algorithm, the construct “Let result be the result of trying to call algorithm” is equivalent to
Let temp be the result of calling algorithm.
If temp is an error return temp, otherwise let result be temp's data field.
The result of getting a property with name from object is defined as being the same as the result of calling Object.[[GetOwnProperty]](name) on object.
The result of getting a property with default with
arguments name and default
from object is defined as being the same as the result of
calling
Object.[[GetOwnProperty]](name)
on object if that results in a value other
than undefined
and default otherwise.
Setting a property with arguments name and value on object is defined as being the same as calling Object.[[Put]](name, value) on object.
The result of JSON serialization with object of type JSON Object is defined as the result of calling stringify(object).
The result of JSON deserialization with text is defined as the result of calling parse(text).
The WebDriver protocol is organized into commands. Each HTTP request with a method and template defined in this specification represents a single command, and therefore each command produces a single HTTP response.
In response to a command, a remote end will run a series of actions known as remote end steps. These provide the sequences of actions that a remote end takes when it receives a particular command.
The remote end is an HTTP server reading requests from the client and writing responses, typically over a TCP socket. For the purposes of this specification we model the data transmission between a particular local end and remote end with a connection to which the remote end may write bytes and read bytes. However the exact details of how this connection works and how it is established are out of scope.
After a connection is established, the remote end must run the following steps:
While the connection is not closed:
Read bytes from the connection until a complete HTTP request can be constructed from the data. Let request be a request constructed from the received data, according to the requirements of [RFC7230]. If it is not possible to construct a complete HTTP request, the remote end must either close the connection, return an HTTP response with status code 500, or return an error with error code unknown error.
Let request match be the result of the algorithm to match a request with request's method and URL as arguments.
If request match is of type error, send an error with request match's error code and continue.
Otherwise, let command and URL variables be request match's data.
Let session be null.
If URL variables contains "session id"
:
This condition is intended to exclude the New Session and Status commands and any extension commands which do not operate on a particular session.
Let session id be URL variables["session id
"].
For each active session in the list of active sessions:
If active session's session ID is equal to session id, then let session be active session, and break.
If the session is null
send an error with error code invalid session id,
then continue.
Enqueue a task on remote end's request queue to run the following steps:
Let parameters be null
.
If request's method is POST:
Let parse result be the result of parsing as JSON with request's body as the argument. If this process throws an exception, return an error with error code invalid argument and jump back to step 1 in this overall algorithm.
If parse result is not an Object, send an error with error code invalid argument and jump back to step 1 in this overall algorithm.
Otherwise, let parameters be parse result.
Let navigate result be the result of wait for navigation to complete with session.
If navigate result is an error, send an error with error code equal to navigate result's error code and return.
Let response result be the return value obtained by running the remote end steps for command with session, URL variables, and parameters.
If response result is an error, send an error with error code equal to response result's error code and return.
Assert: response result is a success.
Let response data be response result's data.
Send a response with status 200 and response data.
When required to send an error, with error code and an optional error data dictionary, a remote end must run the following steps:
Let status and name be the error response data for error code.
Let message be an implementation-defined string containing a human-readable description of the reason for the error.
Let stacktrace be an implementation-defined string containing a stack trace report of the active stack frames at the time when the error occurred.
Let body be a new JSON Object initialized with the following properties:
error
"
message
"
stacktrace
"
If the error data dictionary contains any entries,
set the "data
" field on body
to a new JSON Object populated with the dictionary.
Send a response with status and body as arguments.
When required to send a response, with arguments status and data, a remote end must run the following steps:
Let response be a new response.
Set response's HTTP status to status, and status message to the string corresponding to the description of status in the status code registry.
Set the response's header with name and value with the following values:
Content-Type
application/json; charset=utf-8
"
Cache-Control
no-cache
"
Let response's body be
the UTF-8 encoded JSON
serialization of a JSON Object with a key
"value
" set to data.
Let response bytes be the byte sequence resulting from serializing response according to the rules in [RFC7230].
Write response bytes to the connection.
Request routing is the process of going from an HTTP request to the series of steps needed to implement the command represented by that request.
A remote end has an associated URL prefix, which is used as a prefix on all WebDriver-defined URLs on that remote end. This must either be undefined or a path-absolute URL.
In order to match a request given a method and URL, the following steps must be taken:
Let endpoints be a list containing each row in the table of endpoints.
Remove each entry from endpoints for which the concatenation of the URL prefix and the entry's URI template does not have a valid expansion equal to URL's path.
If there are no entries in endpoints, return error with error code unknown command.
Remove each entry in endpoints for which the method column is not equal to method.
If there are no entries in endpoints, return error with error code unknown method.
There is now exactly one entry in endpoints; let entry be this entry.
Let URI template be the concatenation of URL prefix with entry's URI template.
Let command be entry's command.
Let URL variables be a map with one entry for each variable defined in URI template, with the entry name equal to the template variable name, and the entry value being the variable value required to expand the URI template to match URL's path.
Return success with data command and URL variables.
The following table of endpoints lists the method and URI template for each endpoint node command. Extension commands are implicitly appended to this table.
Method | URI Template | Command |
---|---|---|
POST | /session | New Session |
DELETE | /session/{session id} | Delete Session |
GET | /status | Status |
GET | /session/{session id}/timeouts | Get Timeouts |
POST | /session/{session id}/timeouts | Set Timeouts |
POST | /session/{session id}/url | Navigate To |
GET | /session/{session id}/url | Get Current URL |
POST | /session/{session id}/back | Back |
POST | /session/{session id}/forward | Forward |
POST | /session/{session id}/refresh | Refresh |
GET | /session/{session id}/title | Get Title |
GET | /session/{session id}/window | Get Window Handle |
DELETE | /session/{session id}/window | Close Window |
POST | /session/{session id}/window | Switch To Window |
GET | /session/{session id}/window/handles | Get Window Handles |
POST | /session/{session id}/window/new | New Window |
POST | /session/{session id}/frame | Switch To Frame |
POST | /session/{session id}/frame/parent | Switch To Parent Frame |
GET | /session/{session id}/window/rect | Get Window Rect |
POST | /session/{session id}/window/rect | Set Window Rect |
POST | /session/{session id}/window/maximize | Maximize Window |
POST | /session/{session id}/window/minimize | Minimize Window |
POST | /session/{session id}/window/fullscreen | Fullscreen Window |
GET | /session/{session id}/element/active | Get Active Element |
GET | /session/{session id}/element/{element id}/shadow | Get Element Shadow Root |
POST | /session/{session id}/element | Find Element |
POST | /session/{session id}/elements | Find Elements |
POST | /session/{session id}/element/{element id}/element | Find Element From Element |
POST | /session/{session id}/element/{element id}/elements | Find Elements From Element |
POST | /session/{session id}/shadow/{shadow id}/element | Find Element From Shadow Root |
POST | /session/{session id}/shadow/{shadow id}/elements | Find Elements From Shadow Root |
GET | /session/{session id}/element/{element id}/selected | Is Element Selected |
GET | /session/{session id}/element/{element id}/attribute/{name} | Get Element Attribute |
GET | /session/{session id}/element/{element id}/property/{name} | Get Element Property |
GET | /session/{session id}/element/{element id}/css/{property name} | Get Element CSS Value |
GET | /session/{session id}/element/{element id}/text | Get Element Text |
GET | /session/{session id}/element/{element id}/name | Get Element Tag Name |
GET | /session/{session id}/element/{element id}/rect | Get Element Rect |
GET | /session/{session id}/element/{element id}/enabled | Is Element Enabled |
GET | /session/{session id}/element/{element id}/computedrole | Get Computed Role |
GET | /session/{session id}/element/{element id}/computedlabel | Get Computed Label |
POST | /session/{session id}/element/{element id}/click | Element Click |
POST | /session/{session id}/element/{element id}/clear | Element Clear |
POST | /session/{session id}/element/{element id}/value | Element Send Keys |
GET | /session/{session id}/source | Get Page Source |
POST | /session/{session id}/execute/sync | Execute Script |
POST | /session/{session id}/execute/async | Execute Async Script |
GET | /session/{session id}/cookie | Get All Cookies |
GET | /session/{session id}/cookie/{name} | Get Named Cookie |
POST | /session/{session id}/cookie | Add Cookie |
DELETE | /session/{session id}/cookie/{name} | Delete Cookie |
DELETE | /session/{session id}/cookie | Delete All Cookies |
POST | /session/{session id}/actions | Perform Actions |
DELETE | /session/{session id}/actions | Release Actions |
POST | /session/{session id}/alert/dismiss | Dismiss Alert |
POST | /session/{session id}/alert/accept | Accept Alert |
GET | /session/{session id}/alert/text | Get Alert Text |
POST | /session/{session id}/alert/text | Send Alert Text |
GET | /session/{session id}/screenshot | Take Screenshot |
GET | /session/{session id}/element/{element id}/screenshot | Take Element Screenshot |
POST | /session/{session id}/print | Print Page |
Errors are represented in the WebDriver protocol
by an HTTP response with an HTTP status in the 4xx or 5xx range,
and a JSON body containing details of the error.
The body is a JSON Object
and has a field named "value
"
whose value is an object bearing three, and sometimes four, fields:
error
", containing a string indicating the error code.
message
", containing an implementation-defined string
with a human readable description of the kind of error that occurred.
stacktrace
", containing an implementation-defined string
with a stack trace report of the active stack frames at the time when the error occurred.
data
", which is a JSON Object
with additional error data helpful in diagnosing the error.
The following table lists each error code,
its associated HTTP status,
JSON error
code,
and a non-normative description of the error.
The error response data for a particular error code
is the values of the HTTP Status
and JSON Error Code columns for the row corresponding to that error code.
Error Code | HTTP Status | JSON Error Code | Description |
---|---|---|---|
element click intercepted | 400 | element click intercepted
| The Element Click command could not be completed because the element receiving the events is obscuring the element that was requested clicked. |
element not interactable | 400 | element not interactable
| A command could not be completed because the element is not pointer- or keyboard interactable. |
insecure certificate | 400 | insecure certificate
| Navigation caused the user agent to hit a certificate warning, which is usually the result of an expired or invalid TLS certificate. |
invalid argument | 400 | invalid argument
| The arguments passed to a command are either invalid or malformed. |
invalid cookie domain | 400 | invalid cookie domain
| An illegal attempt was made to set a cookie under a different domain than the current page. |
invalid element state | 400 | invalid element state
| A command could not be completed because the element is in an invalid state, e.g. attempting to clear an element that isn't both editable and resettable. |
invalid selector | 400 | invalid selector
| Argument was an invalid selector. |
invalid session id | 404 | invalid session id
| Occurs if the given session id is not in the list of active sessions, meaning the session either does not exist or that it's not active. |
javascript error | 500 | javascript error
| An error occurred while executing JavaScript supplied by the user. |
move target out of bounds | 500 | move target out of bounds
| The target for mouse interaction is not in the browser's viewport and cannot be brought into that viewport. |
no such alert | 404 | no such alert
| An attempt was made to operate on a modal dialog when one was not open. |
no such cookie | 404 | no such cookie
| No cookie matching the given path name was found amongst the associated cookies of session's current browsing context's active document. |
no such element | 404 | no such element
| An element could not be located on the page using the given search parameters. |
no such frame | 404 | no such frame
| A command to switch to a frame could not be satisfied because the frame could not be found. |
no such window | 404 | no such window
| A command to switch to a window could not be satisfied because the window could not be found. |
no such shadow root | 404 | no such shadow root
| The element does not have a shadow root. |
script timeout error | 500 | script timeout
| A script did not complete before its timeout expired. |
session not created | 500 | session not created
| A new session could not be created. |
stale element reference | 404 | stale element reference
| A command failed because the referenced element is no longer attached to the DOM. |
detached shadow root | 404 | detached shadow root
| A command failed because the referenced shadow root is no longer attached to the DOM. |
timeout | 500 | timeout
| An operation did not complete before its timeout expired. |
unable to set cookie | 500 | unable to set cookie
| A command to set a cookie's value could not be satisfied. |
unable to capture screen | 500 | unable to capture screen
| A screen capture was made impossible. |
unexpected alert open | 500 | unexpected alert open
| A modal dialog was open, blocking this operation. |
unknown command | 404 | unknown command
| A command could not be executed because the remote end is not aware of it. |
unknown error | 500 | unknown error
| An unknown error occurred in the remote end while processing the command. |
unknown method | 405 | unknown method
| The requested command matched a known URL but did not match any method for that URL. |
unsupported operation | 500 | unsupported operation
| Indicates that a command that should have executed properly cannot be supported for some reason. |
An error data dictionary is a mapping of string keys to JSON serializable values that can optionally be included with error objects.
Using the terminology defined in this section, others may define additional commands that seamlessly integrate with the standard protocol. This allows vendors to expose functionality that is specific to their user agent, and it also allows other web standards to define commands for automating new platform features.
Commands defined in this way are called extension commands and behave no differently than other commands; each has a dedicated HTTP endpoint and a set of remote end steps.
Each extension command has an associated extension command URI Template that is a URI Template string, and which should bear some resemblance to what the command performs. This value, along with the HTTP method and extension command, is added to the table of endpoints and thus follows the same rules for request routing as that of other built-in commands.
In order to avoid potential resource conflicts with other implementations, vendor-specific extension command URI Templates must begin with one or more path segments which uniquely identifies the vendor and UA. It is suggested that vendors use their vendor prefixes without additional characters as outlined in [CSS21], notably in section 4.1.2.2 on vendor keywords, as the name for this path element, and include a vendor-chosen UA identifier.
Other specifications may define additional WebDriver capabilities. Each defined
capability must have a capability name which
is a string not containing a ":
" (colon) character,
an additional capability deserialization
algorithm which is a set of steps taking a single
argument value which has a JSON type, returning
either success wrapping the deserialized capability value
or error.
An additional WebDriver capability may also define
a matched capability serialization algorithm,
which is a set of steps used to determine if a capability is matched
by the current implementation and provide any computed value to return
to the user. This set of steps takes a single
argument value, which is the output of the
corresponding additional capability deserialization algorithm,
and returns either null
to indicate the capability
is not matched, or a non-null JSON-serializable value if the
capability is matched.
Other specifications may also define WebDriver new session algorithms, which are called just after a new session is created, and before the new session response is sent to the remote end. These algorithms are called with session representing the WebDriver session that will be established, and capabilities, the capabilities object that will be returned to the remote end. It is permitted for such an algorithm to modify any entry in the capabilities object with a name that's an additional WebDriver capability defined by the same specification.
Remote ends may also introduce
extension capabilities
that are extra capabilities
used to provide configuration or fulfill other vendor-specific needs.
Extension capabilities' key
must contain a ":
" (colon) character,
denoting an implementation specific namespace.
The value can be arbitrary JSON types.
As with extension commands,
it is suggested that the key used to denote
the extension capability namespace
is based on the vendor keywords
listed in [CSS21]
and precedes the first ":
" character in the string.
WebDriver capabilities are used to communicate the features supported by a given implementation. The local end may use capabilities to define which features it requires the remote end to satisfy when creating a new session. Likewise, the remote end uses capabilities to describe the full feature set for a session.
The following table of standard capabilities enumerates the capabilities each implementation must support. An implementation may define additional extension capabilities.
Capability | Key | Value Type | Description |
---|---|---|---|
Browser name | "browserName "
| string | Identifies the user agent. |
Browser version | "browserVersion "
| string | Identifies the version of the user agent. |
Platform name | "platformName "
| string | Identifies the operating system of the endpoint node. |
Accept insecure TLS certificates | "acceptInsecureCerts "
| boolean | Indicates whether untrusted and self-signed TLS certificates are implicitly trusted on navigation for the duration of the session. |
Page load strategy | "pageLoadStrategy "
| string | Defines the session's page load strategy. |
Proxy configuration | "proxy "
| JSON Object | Defines the session's proxy configuration. |
Window dimensioning/positioning | "setWindowRect "
| boolean | Indicates whether the remote end supports all of the resizing and repositioning commands. |
Session timeouts | "timeouts "
| JSON Object | Describes the timeouts imposed on certain session operations. |
Strict file interactability | "strictFileInteractability "
| boolean | Defines the session's strict file interactability. |
Unhandled prompt behavior | "unhandledPromptBehavior "
| string | Describes the session's user prompt handler.
Defaults to "dismiss and notify ".
|
User Agent | "userAgent "
| string | Identifies the default User-Agent value of the endpoint node. |
The proxy configuration capability is a JSON Object nested within the primary capabilities. Implementations may define additional proxy configuration options, but they must not alter the semantics of those listed below.
Key | Value Type | Description | Valid values |
---|---|---|---|
proxyType
| string | Indicates the type of proxy configuration. | "pac ",
"direct ",
"autodetect ",
"system ",
or "manual ".
|
proxyAutoconfigUrl
| string | Defines the URL for a proxy autoconfiguration file
if is equal to "pac ".
| Any URL. |
ftpProxy
| string | Defines the proxy host for FTP traffic when
the is "manual ".
| A host and optional port for
scheme "ftp ".
|
httpProxy
| string | Defines the proxy host for HTTP traffic when
the is "manual ".
| A host and optional port for
scheme "http ".
|
noProxy
| array | Lists the address for which the proxy should be bypassed when
the is "manual ".
| A List containing any number of Strings. |
sslProxy
| string | Defines the proxy host for encrypted TLS traffic
when the is "manual ".
| A host and optional port for
scheme "https ".
|
socksProxy
| string | Defines the proxy host for a SOCKS proxy
when the is "manual ".
| A host and optional port with an undefined scheme. |
socksVersion
| number | Defines the SOCKS proxy version
when the is "manual ".
| Any integer between 0 and 255 inclusive. |
A host and optional port for a scheme is defined as being a valid host, optionally followed by a colon and a valid port. The host may include credentials. If the port is omitted and scheme has a default port, this is the implied port. Otherwise, the port is left undefined.
A
of "proxyType
direct
" indicates
that the browser should not use a proxy at all.
A
of "proxyType
system
" indicates
that the browser should use the various proxies configured for the
underlying Operating System.
A
of "proxyType
autodetect
"
indicates that the proxy to use should be detected in an
implementation-specific way.
The remote end steps to deserialize as a proxy argument parameter are:
If parameter is not a JSON Object return an error with error code invalid argument.
Let proxy be a new, empty proxy configuration object.
For each enumerable own property in parameter run the following substeps:
Let key be the name of the property.
Let value be the result of getting a property named name from parameter.
If there is no matching key
for key
in the proxy configuration table return an error
with error code invalid argument.
If value is not one of the
valid values
for that key
, return
an error with error code invalid argument.
Set a property key to value on proxy.
If proxy does not have an own property for
"proxyType
" return an error with error
code invalid argument.
If the result of getting a property
named "proxyType
" from proxy equals
"pac
", and proxy does not have an
own property for "proxyAutoconfigUrl
" return
an error with error code invalid argument.
If proxy has an own property for
"socksProxy
" and does not have an own property
for "socksVersion
" return an error with error
code invalid argument.
Return success with data proxy.
A proxy configuration object is a JSON Object where each of its own properties matching keys in the proxy configuration meets the validity criteria for that key.
To process capabilities given parameters, and session configuration flags flags, the endpoint node must take the following steps:
Let capabilities request be the result of getting the property
"capabilities
" from parameters.
If capabilities request is not a JSON Object, return error with error code invalid argument.
Let required capabilities be the result of getting the property
"alwaysMatch
" from capabilities request.
If required capabilities is undefined, set the value to an empty JSON Object.
Let required capabilities be the result of trying to validate capabilities with arguments required capabilities and flag.
Let all first match capabilities be the result of getting the property
"firstMatch
" from capabilities request.
If all first match capabilities is undefined, set the value to a List with a single entry of an empty JSON Object.
If all first match capabilities is not a List with one or more entries, return error with error code invalid argument.
Let validated first match capabilities be an empty List.
For each first match capabilities corresponding to an indexed property in all first match capabilities:
Let validated capabilities be the result of trying to validate capabilities with arguments first match capabilities and flags.
Append validated capabilities to validated first match capabilities.
Let merged capabilities be an empty List.
For each first match capabilities corresponding to an indexed property in validated first match capabilities:
Let merged be the result of trying to merge capabilities with required capabilities and first match capabilities as arguments.
Append merged to merged capabilities.
For each capabilities corresponding to an indexed property in merged capabilities:
Let matched capabilities be the result of trying to match capabilities with capabilities as an argument.
If matched capabilities is not null
,
return success with data matched capabilities.
When required to validate capabilities with argument capabilities:
If capabilities is not a JSON Object return an error with error code invalid argument.
Let result be an empty JSON Object.
For each enumerable own property in capabilities, run the following substeps:
Let name be the name of the property.
Let value be the result of getting a property named name from capabilities.
Run the substeps of the first matching condition:
null
Let deserialized be set to null
.
acceptInsecureCerts
"
If value is not a boolean return an error with error code invalid argument. Otherwise, let deserialized be set to value.
browserName
"
browserVersion
"
platformName
"
If value is not a string return an error with error code invalid argument. Otherwise, let deserialized be set to value.
pageLoadStrategy
"
Let deserialized be the result of trying to deserialize as a page load strategy with argument value.
proxy
"
Let deserialized be the result of trying to deserialize as a proxy with argument value.
strictFileInteractability
"
If value is not a boolean return an error with error code invalid argument. Otherwise, let deserialized be set to value
timeouts
"
Let deserialized be the result of trying to deserialize as timeouts configuration with value.
unhandledPromptBehavior
"
Let deserialized be the result of trying to deserialize as an unhandled prompt behavior with argument value.
Let deserialized be the result of trying to run the additional capability deserialization algorithm for the extension capability corresponding to name, with argument value.
If name is known to the implementation, let deserialized be the result of trying to deserialize value in an implementation-specific way. Otherwise, let deserialized be set to value.
Return an error with error code invalid argument.
If deserialized is not null
,
set a property on result with name name
and value deserialized.
When merging capabilities with JSON Object arguments primary and secondary, an endpoint node must take the following steps:
Let result be a new JSON Object.
For each enumerable own property in primary, run the following substeps:
Let name be the name of the property.
Let value be the result of getting a property named name from primary.
If secondary is undefined, return result.
For each enumerable own property in secondary, run the following substeps:
Let name be the name of the property.
Let value be the result of getting a property named name from secondary.
Let primary value be the result of getting the property name from primary.
If primary value is not undefined, return an error with error code invalid argument.
Return result.
When matching capabilities given JSON Object capabilities, and a session configuration flags flags, an endpoint node must take the following steps:
Let matched capabilities be a JSON Object with the following entries:
browserName
"
browserVersion
"
platformName
"
acceptInsecureCerts
"
strictFileInteractability
"
setWindowRect
"
userAgent
"
If flags contains "http
", add the
following entries to matched capabilities:
strictFileInteractability
"
Optionally add extension capabilities as entries to matched capabilities. The values of these may be elided, and there is no requirement that all extension capabilities be added.
For each name and value corresponding to capabilities's own properties:
Let match value equal value.
Run the substeps of the first matching name:
browserName
"
If value is not a string equal to
the "browserName
" entry in
matched capabilities, return success
with data null
.
There is a chance the remote end will need
to start a browser process to correctly determine
the browserName
. Lightweight checks are preferred
before this is done.
browserVersion
"
Compare value
to the "browserVersion
" entry in matched capabilities
using an implementation-defined comparison algorithm.
The comparison is to accept a value
that places constraints on the version using
the "<
", "<=
", ">
",
and ">=
" operators.
If the two values do not match,
return success with data null
.
Version comparison is left as an implementation detail since each user agent will likely have conflicting methods of encoding the user agent version, and standardizing these schemes is beyond the scope of this standard.
There is a chance the remote end will need
to start a browser process to correctly determine
the browserVersion
. Lightweight checks are preferred
before this is done.
platformName
"
If value is not a string equal
to the "platformName
" entry in matched capabilities,
return success with data null
.
The following platform names are in common usage with well-understood semantics and, when matching capabilities, greatest interoperability can be achieved by honoring them as valid synonyms for well-known Operating Systems:
Key | System |
---|---|
"linux " | Any server or desktop system based upon the Linux kernel. |
"mac " | Any version of Apple's macOS. |
"windows " | Any version of Microsoft Windows, including desktop and mobile versions. |
This list is not exhaustive.
When returning capabilities from New Session,
it is valid to return a more
specific platformName
, allowing users to
correctly identify the Operating System the WebDriver
implementation is running on.
acceptInsecureCerts
"
If accept insecure TLS flag is set and not equal
to value, return success with
data null
.
If the endpoint node does not support insecure TLS certificates and this is the reason no match is ultimately made, it is useful to provide this information to the local end.
proxy
"
If the has proxy configuration flag is set, or if
the proxy configuration defined in value is not one
that passes the endpoint node's implementation-specific
validity checks, return success with
data null
.
A local end would only send this capability if it expected it to be honored and the configured proxy used. The intent is that if this is not possible a new session will not be established.
unhandledPromptBehavior
"
If check user prompt handler matches
with value is false, return success with
data null
.
If name is the name of an additional WebDriver capability which defines a matched capability serialization algorithm, let match value be the result of running the matched capability serialization algorithm for capability name with arguments value, and flags.
Otherwise, if name is the key of an
extension capability, let match value be the
result of trying implementation-specific steps to
match on name with value. If the
match is not successful, return success with
data null
.
If match value is not null, set a property on matched capabilities with name name and value match value.
Return success with data matched capabilities.
A WebDriver session represents the logical connection between a local end and a specific remote end. The session object holds state specific to that connection.
An intermediary node will maintain an associated session for each active session. This is the session on the upstream neighbor that is created when the intermediary node executes the New Session command. Closing a session on an intermediary node will also close the session of the associated session.
A session has a session ID, which is the string representation of a UUID used to uniquely identify the session. This is set when creating the session.
A session has a boolean HTTP flag which is set when the session is created. A session with this flag set is an HTTP session.
A remote end has an associated list of active sessions, which is a list of all sessions that are currently started.
A remote end has an associated list of active HTTP sessions, which is a list of all HTTP sessions that are currently started.
The limitation of a single HTTP session for endpoint nodes means that the first entry in the list of active HTTP sessions will be the only entry.
A HTTP session has an associated current browsing context, which is the browsing context against which commands will run, an associated current parent browsing context, which is set to the parent of the current browsing context when changing browsing contexts, and an associated current top-level browsing context, which is set to the top-browsing context ancestor of the current browsing context, when changing browsing contexts.
An HTTP session has an associated session timeouts which is a timeouts configuration. This is initially set to a new timeouts configuration.
An HTTP session has an associated page loading strategy, which is one of the keywords from the table of page load strategies. This is initially set to normal.
An HTTP session has an associated strict file interactability state which is a boolean. This is initially set to false.
A session has an associated browsing context input state map, which is a weak map with top-level browsing contexts as keys, and input state objects as values. This is initially set to an empty map.
An HTTP session has an associated request queue which is a queue of requests that are currently awaiting processing.
When a session is created, a set of session configuration
flags are provided that define the features of the session. This
specification always creates sessions with "http
"
in session configuration flags, which corresponds to
the HTTP flag. External specifications may define additional
flags, or create sessions without the HTTP flag.
In addition to per-session state, a remote end that is an endpoint node also has additional state that is global across all sessions.
An endpoint node has an associated accept insecure TLS flag that indicates whether untrusted or self-signed TLS certificates are treated as trusted. The default value of the flag is false if the endpoint doesn't support accepting insecure TLS connections, or unset otherwise.
An endpoint node has an associated has proxy configuration flag that indicates whether the proxy is already configured. The default value of the flag is true if the endpoint doesn't support proxy configuration, or false otherwise.
To create a session, given a JSON Object capabilites, and session configuration flags flags:
Let session id be the result of generating a UUID.
Let session be a new session with session
ID session id, and HTTP flag flags contains
"http
".
Let proxy be the result of getting property
"proxy
" from capabilities and run the
substeps of the first matching statement:
Take implementation-defined steps to set the user agent proxy using the extracted proxy configuration. If the defined proxy cannot be configured return error with error code session not created. Otherwise set the has proxy configuration flag to true.
proxy
" and a value that is a new JSON Object.If capabilites has a property named
"acceptInsecureCerts
", set the endpoint
node's accept insecure TLS flag to the result
of getting a property named
"acceptInsecureCerts
" from capabilities.
Let user prompt handler capability be the result of getting property
"unhandledPromptBehavior
" from capabilities.
If user prompt handler capability is not undefined, update the user prompt handler with user prompt handler capability.
Let serialized user prompt handler be serialize the user prompt handler.
Set a property on capabilities with the name
"unhandledPromptBehavior
", and the value serialized
user prompt handler.
If flags contains "http
":
Let strategy be the result of getting
property "pageLoadStrategy
"
from capabilities.
If strategy is a
string, set the session's page loading
strategy to strategy. Otherwise, set
the page loading strategy to normal and set a
property of capabilities with name
"pageLoadStrategy
" and value
"normal
".
Let strictFileInteractability be the result
of getting property "strictFileInteractability
"
from capabilities. If strictFileInteractability
is a boolean, set session's strict file
interactability to strictFileInteractability.
Let timeouts be the result of getting a
property "timeouts
" from capabilities.
If timeouts is not undefined, set
session's session timeouts
to timeouts.
Set a property on capabilities with name
"timeouts
" and value serialize the timeouts
configuration with session's
session timeouts.
Process any extension capabilities in capabilities in an implementation-defined manner.
Run any WebDriver new session algorithm defined in external specifications, with arguments session, capabilities, and flags.
Append session to active sessions.
If flags contains "http
",
append session to active HTTP sessions.
Set the webdriver-active flag to true.
To close the session, given session a remote end must take the following steps:
If session's HTTP flag is set, remove session from active HTTP sessions.
Remove session from active sessions.
Perform the following substeps based on the remote end's type:
If the list of active sessions is empty:
Set the webdriver-active flag to false
Set the user prompt handler to null.
Unset the accept insecure TLS flag.
Reset the has proxy configuration flag to its default value.
Optionally, close all top-level browsing contexts, without prompting to unload.
Close the associated session. If this causes an error to occur, complete the remainder of this algorithm before returning the error.
Perform any implementation-specific cleanup steps.
If an error has occurred in any of the steps above,
return the error, otherwise return success with
data null
.
Closing a session might cause the associated browser process to be killed. It is assumed that any implementation-specific cleanup steps are performed after the response has been sent back to the client so that the connection is not prematurely closed.
HTTP Method | URI Template |
---|---|
POST | /session |
The New Session command creates a new WebDriver session with the endpoint node. If the creation fails, a session not created error is returned.
If the remote end is an intermediary node, it may use the result of the capabilities processing algorithm to route the new session request to the appropriate endpoint node. An intermediary node is free to define extension capabilities to assist in this process, however, these specific capabilities must not be forwarded to the endpoint node.
If the intermediary node requires additional information unrelated to user agent features, it is recommended that this information be passed as top-level parameters, and not as part of the requested capabilities. An intermediary node must forward custom, top-level parameters (i.e. non-capabilities) to subsequent remote end nodes.
The remote end steps, given session, URL variables and parameters are:
If the implementation is an endpoint node, and the list of active HTTP sessions is not empty, or otherwise if the implementation is unable to start an additional session, return error with error code session not created.
If the remote end is an intermediary node, take implementation-defined steps that either result in returning an error with error code session not created, or in returning a success with data that is isomorphic to that returned by remote ends according to the rest of this algorithm. If an error is not returned, the intermediary node must retain a reference to the session created on the upstream node as the associated session such that commands may be forwarded to this associated session on subsequent commands.
How this is done is entirely up to the implementation,
but typically the sessionId
, and URL and
URL prefix of the upstream remote end will need
to be tracked.
Let flags be a set containing "http
".
Let capabilities be the result of trying to process capabilities with parameters and flags.
If capabilities's is null
,
return error with error code session not created.
Let session be the result of create a session, with capabilities, and flags.
Let body be a JSON Object initialized with:
sessionId
"
capabilities
"
Set session' current top-level browsing context to one of the endpoint node's top-level browsing contexts, preferring the top-level browsing context that has system focus, or otherwise preferring any top-level browsing context whose visibility state is visible.
WebDriver implementations typically start a completely new browser instance, but there is no requirement in this specification (or for WebDriver only to be used to automate only web browsers). Implementations might choose to use an existing browser instance, eg. by selecting the window that currently has focus.
Set the request queue to a new queue.
Return success with data body.
HTTP Method | URI Template |
---|---|
DELETE | /session/{session id} |
The remote end steps, given session, URL variables and parameters are:
If session is an active HTTP session, try to close the session with session.
HTTP Method | URI Template |
---|---|
GET | /status |
Implementations may optionally include
additional meta information as part of the body,
but the top-level properties
ready
and message
are reserved and must not be overwritten.
The remote end steps, given session, URL variables and parameters are:
Let body be a new JSON Object with the following properties:
ready
"
The remote end's readiness state.
message
"
An implementation-defined string explaining the remote end's readiness state.
Return success with data body.
A timer is a struct. It has a timeout fired flag, which is a boolean, initially false.
To start the timer given timer and timeout
Assert: timeout is not null.
Run the following steps in parallel:
Wait for at least timeout milliseconds to pass.
Set timer's timeout fired flag to true.
A timeouts configuration is a struct representing the timeouts for script evaluation, navigation, and element retrieval. It has a script timeout item which is an integer or null and is initially set to 30,000, a page load timeout item which is an integer or null and is initially set to 300,000, and an implicit wait timeout item which is an integer or null and is initially set to 0. To deserialize as timeouts configuration given timeouts:
Set timeouts to the result of converting a JSON-derived JavaScript value to an Infra value with timeouts.
Let configuration be a new timeouts configuration.
For each key → value in timeouts:
If «"script
", "pageLoad
",
"implicit
"» does not contain key,
then continue.
If value is neither null nor a number greater than or equal to 0 and less than or equal to the maximum safe integer return error with error code invalid argument.
Run the substeps matching key:
script
"
Set configuration's script timeout to value.
pageLoad
"
Set configuration's page load timeout to value.
implicit
"
Set configuration's implicit wait timeout to value.
Return success with data configuration.
Let serialized be an empty map.
Set serialized["script
"]
to timeouts' script timeout.
Set serialized["pageLoad
"]
to timeouts' page load timeout.
Set serialized["implicit
"]
to timeouts' implicit wait timeout.
Return convert an Infra value to a JSON-compatible JavaScript value with serialized.
HTTP Method | URI Template |
---|---|
GET | /session/{session id}/timeouts |
The remote end steps, given session, URL variables and parameters are:
Let timeouts be serialize the timeouts configuration with session's timeouts configuration
Return success with data timeouts.
HTTP Method | URI Template |
---|---|
POST | /session/{session id}/timeouts |
The remote end steps, given session, URL variables and parameters are:
Let timeouts be the result of trying to deserialize as timeouts configuration with parameters.
Set session's timeouts configuration to timeouts.
Many WebDriver commands happen in the context of either session's current browsing context or current top-level browsing context. session's current top-level browsing context is represented in the protocol by its associated window handle. When a top-level browsing context is selected using the Switch To Window command, a specific browsing context can be selected using the Switch to Frame command.
The use of the term “window” to
refer to a top-level browsing context
is legacy and doesn't correspond with either
the operating system notion of a “window”
or the DOM Window
object.
A browsing context is said to be no longer open if its navigable has been destroyed.
Each browsing context has an associated
window handle which uniquely
identifies it. This must be a String and must not be
"current
".
A web frame is an abstraction used to identify a frame or iframe when it is transported via the protocol, between remote and local ends.
The web frame identifier
is the string constant "frame-075b-4da1-b6ba-e579c2d3230a
".
An ECMAScript Object represents a web frame if it has a web frame identifier own property.
A web window is an abstraction used to identify a window when it is transported via the protocol, between remote and local ends.
The web window identifier
is the string constant "window-fcc6-11e5-b4f8-330a88ab9d7f
".
An ECMAScript Object represents a web window if it has a web window identifier own property.
The WindowProxy
reference object
with WindowProxy
object window is
given by:
Let identifier be the web window identifier if the associated browsing context of window is a top-level browsing context.
Otherwise let it be the web frame identifier.
Return a JSON Object initialized with the following properties:
Associated window handle of the window's browsing context.
To deserialize a web frame by a JSON Object object that represents a web frame:
If object has no own property web frame identifier, return error with error code invalid argument.
Let reference be the result of getting the web frame identifier property from object.
Let browsing context be the browsing context whose window handle is reference, or null if no such browsing context exists.
If browsing context is null or a top-level browsing context, return error with error code no such frame.
Return success with data browsing context's associated window.
To deserialize a web window by a JSON Object object that represents a web window:
If object has no own property web window identifier, return error with error code invalid argument.
Let reference be the result of getting the web window identifier property from object.
Let browsing context be the browsing context whose window handle is reference, or null if no such browsing context exists.
If browsing context is null or not a top-level browsing context, return error with error code no such window.
Return success with data browsing context's associated window.
When required to set the current browsing context given session and context, an implementation must follow the following steps:
Set session's current browsing context to context.
Set the session's current parent browsing context to the parent browsing context of context, if that context exists, or null otherwise.
When required to set the current top-level browsing context given session and context, an implementation must:
Assert: context is a top-level browsing context.
Set session's current top-level browsing context to context.
Set the current browsing context with session and context.
In accordance with the focus section of the [HTML] specification, commands are unaffected by whether the operating system window has focus or not.
HTTP Method | URI Template |
---|---|
GET | /session/{session id}/window |
The remote end steps, given session, URL variables and parameters are:
If session's current top-level browsing context is no longer open, return error with error code no such window.
Return success with data being the window handle associated with session's current top-level browsing context.
HTTP Method | URI Template |
---|---|
DELETE | /session/{session id}/window |
The remote end steps, given session, URL variables and parameters are:
If session's current top-level browsing context is no longer open, return error with error code no such window.
Try to handle any user prompts with session.
Close session's current top-level browsing context.
If there are no more open top-level browsing contexts, then try to close the session.
HTTP Method | URI Template |
---|---|
POST | /session/{session id}/window |
Switching window will select session's current top-level browsing context used as the target for all subsequent commands. In a tabbed browser, this will typically make the tab containing the browsing context the selected tab.
The remote end steps, given session, URL variables and parameters are:
Let handle be the result of
getting the property "handle
"
from parameters.
If handle is undefined, return error with error code invalid argument.
If there is an active user prompt, that prevents the focusing of another top-level browsing context, return error with error code unexpected alert open.
If handle is equal to the associated window handle for some top-level browsing context, let context be the that browsing context, and set the current top-level browsing context with session and context.
Otherwise, return error with error code no such window.
Update any implementation-specific state that would result from the user selecting session's current browsing context for interaction, without altering OS-level focus.
HTTP Method | URI Template |
---|---|
GET | /session/{session id}/window/handles |
The order in which the window handles are returned is arbitrary.
The remote end steps, given session, URL variables and parameters are:
Let handles be a List.
For each top-level browsing context in the remote end, push the associated window handle onto handles.
HTTP Method | URI Template |
---|---|
POST | /session/{session id}/window/new |
Create a new top-level browsing context.
The remote end steps, given session, URL variables and parameters are:
If the implementation does not support creating new top-level browsing contexts, return error with error code unsupported operation.
If session's current top-level browsing context is no longer open, return error with error code no such window.
Try to handle any user prompts with session.
Let type hint be the result of getting the property
"type
" from parameters.
Create a new top-level browsing context by running
the window open steps with URL set to
"about:blank
", target set to the empty
string, and features set to "noopener
" and
the user agent configured to create a new browsing context. This must
be done without invoking the focusing steps for the created browsing
context. If type hint has the value "tab
",
and the implementation supports multiple browsing context in the
same OS window, the new browsing context should share an OS window
with session's current browsing context. If type hint is
"window
", and the implementation supports multiple
browsing contexts in separate OS windows, the created browsing
context should be in a new OS window. In all other cases the details
of how the browsing context is presented to the user are
implementation defined.
Let handle be the associated window handle of the newly created window.
Let type be "tab
" if the newly created
window shares an OS-level window with session's current browsing
context, or "window
" otherwise.
Let result be a new JSON Object initialized with:
handle
"
type
"
Return success with data result.
HTTP Method | URI Template |
---|---|
POST | /session/{session id}/frame |
The Switch To Frame command is used to select session's current top-level browsing context or a child browsing context of session's current browsing context to use as session's current browsing context for subsequent commands. The remote end steps, given session, URL variables and parameters are:
Let id be the result of
getting the property "id
"
from parameters.
If id is not null
,
a Number
object,
or an Object that represents a web element,
return error with error code invalid argument.
Run the substeps of the first matching condition:
null
If session's current top-level browsing context is no longer open, return error with error code no such window.
Try to handle any user prompts with session.
Set the current browsing context with session and session's current top-level browsing context.
Number
object
If id is less than 0 or greater than 216 – 1, return error with error code invalid argument.
If session's current browsing context is no longer open, return error with error code no such window.
Try to handle any user prompts with session.
Let window be the associated window of session's current browsing context's active document.
If id is not a supported property index of window, return error with error code no such frame.
Let child window be
the WindowProxy
object obtained by
calling
window.[[GetOwnProperty]]
(id).
Set the current browsing context with session and child window's browsing context.
If session's current browsing context is no longer open, return error with error code no such window.
Try to handle any user prompts with session.
Let element be the result of trying to get a known element with session and id.
If element is not a frame
or iframe
element,
return error with error code no such frame.
Set the current browsing context with session and element's content navigable's active browsing context.
Update any implementation-specific state that would result from the user selecting session's current browsing context for interaction, without altering OS-level focus.
WebDriver is not bound by the same origin policy, so it is always possible to switch into child browsing contexts, even if they are different origin to the current browsing context.
HTTP Method | URI Template |
---|---|
POST | /session/{session id}/frame/parent |
The Switch to Parent Frame command sets session's current browsing context for future commands to the parent of session's current browsing context.
The remote end steps, given session, URL variables and parameters are:
If session's current browsing context is already the top-level browsing context:
If session's current browsing context is no longer open, return error with error code no such window.
If session's current parent browsing context is no longer open, return error with error code no such window.
Try to handle any user prompts with session.
If session's current parent browsing context is not null, set the current browsing context with session and current parent browsing context.
Update any implementation-specific state that would result from the user selecting session's current browsing context for interaction, without altering OS-level focus.
WebDriver provides commands for interacting with the operating system window containing session's current top-level browsing context. Because different operating systems' window managers provide different abilities, not all of the commands in this section can be supported by all remote ends. Support for these commands is determined by the window dimensioning/positioning capability. Where a command is not supported, an unsupported operation error is returned.
The top-level browsing context has an associated window state which describes what visibility state its OS widget window is in. It can be in one of the following states:
State | Keyword | Default | Description |
---|---|---|---|
Maximized window state | "maximized "
| The window is maximized. | |
Minimized window state | "minimized "
| The window is iconified. | |
Normal window state | "normal "
| ✓ | The window is shown normally. |
Fullscreen window state | "fullscreen "
| The window is in full screen mode. |
If for whatever reason the top-level browsing context's OS window cannot enter either of the window states, or if this concept is not applicable on the current system, the default state must be normal.
The WindowRect object for a WindowProxy, window is an Object initialized with the following properties:
x
"
window's screenX attribute.
y
"
window's screenY attribute.
width
"
windows's outerWidth attribute.
height
"
window's outerHeight attribute.
To maximize the window, given an operating system level window with an associated top-level browsing context, run the implementation-specific steps to transition the operating system level window into the maximized window state. If the window manager supports window resizing but does not have a concept of window maximization, the window dimensions must be increased to the maximum available size permitted by the window manager for the current screen. Return when the window has completed the transition, or within an implementation-defined timeout.
To iconify the window, given an operating system level window with an associated top-level browsing context, run implementation-specific steps to transition the operating system level window into the minimized window state. Do not return from this operation until the visibility state of the top-level browsing context's active document has reached the state, or until the operation times out.
To restore the window, given an operating system level window with an associated top-level browsing context, run implementation-specific steps to restore or unhide the window to the visible screen. Do not return from this operation until the visibility state of the top-level browsing context's active document has reached the visible state, or until the operation times out.
HTTP Method | URI Template |
---|---|
GET | /session/{session id}/window/rect |
The Get Window Rect command returns the size and position on the screen of the operating system window corresponding to session's current top-level browsing context.
The remote end steps, given session, URL variables and parameters are:
If session's current top-level browsing context is no longer open, return error with error code no such window.
Try to handle any user prompts with session.
Return success with data set to the WindowRect object for the session's current top-level browsing context.
HTTP Method | URI Template |
---|---|
POST | /session/{session id}/window/rect |
The Set Window Rect command alters the size and the position of the operating system window corresponding to session's current top-level browsing context.
The remote end steps, given session, URL variables and parameters are:
Let width be the result of
getting a property named "width
"
from parameters.
If width is undefined, let width be null.
Let height be the result of
getting a property named "height
"
from parameters.
If height is undefined, let height be null.
Let x be the result of getting a property
named "x
" from parameters.
If x is undefined, let x be null.
Let y be the result of getting a property
named "y
" from parameters.
If y is undefined, let y be null.
If width or height is neither null, nor a Number from 0 to 231 − 1, return error with error code invalid argument.
If x or y is neither null, nor a Number from −(231) to 231 − 1, return error with error code invalid argument.
If the remote end does not support the Set Window Rect command for session's current top-level browsing context for any reason, return error with error code unsupported operation.
In case the Set Window Rect command is partially supported (i.e. some combinations of arguments are supported but not others), the implmentation is expected to continue with the remaining steps.
If session's current top-level browsing context is no longer open, return error with error code no such window.
Try to handle any user prompts with session.
Let window be the operating system window containing session's current top-level browsing context
If the implementation is able to set the dimensions of window:
If width is not null, set the width, in CSS pixels, of window, including any browser chrome and externally drawn window decorations, to a value that is as close as possible to width.
If height is not null, set the height, in CSS pixels, of window, including any browser chrome and externally drawn window decorations, to a value that is as close as possible to height.
If the implementation is able to set the position of window:
If x is not null, set the x-coordinate of the left edge of window to a value that is as close as possible to x.
If y is not null, set the y-coordinate of the top edge of window to a value that is as close as possible to y.
Return success with data set to the WindowRect object for the session's current top-level browsing context.
HTTP Method | URI Template |
---|---|
POST | /session/{session id}/window/maximize |
The Maximize Window command invokes the window manager-specific “maximize” operation, if any, on the window containing session's current top-level browsing context. This typically increases the window to the maximum available size without going full-screen.
The remote end steps, given session, URL variables and parameters are:
If the remote end does not support the Maximize Window command for session's current top-level browsing context for any reason, return error with error code unsupported operation.
If session's current top-level browsing context is no longer open, return error with error code no such window.
Try to handle any user prompts with session.
Maximize the window of session's current top-level browsing context.
Return success with data set to the WindowRect object for the session's current top-level browsing context.
HTTP Method | URI Template |
---|---|
POST | /session/{session id}/window/minimize |
The Minimize Window command invokes the window manager-specific “minimize” operation, if any, on the window containing session's current top-level browsing context. This typically hides the window in the system tray.
The remote end steps, given session, URL variables and parameters are:
If the remote end does not support the Minimize Window command for session's current top-level browsing context for any reason, return error with error code unsupported operation.
If session's current top-level browsing context is no longer open, return error with error code no such window.
Try to handle any user prompts with session.
Return success with data set to the WindowRect object for the session's current top-level browsing context.
HTTP Method | URI Template |
---|---|
POST | /session/{session id}/window/fullscreen |
The remote end steps, given session, URL variables and parameters are:
If the remote end does not support fullscreen return error with error code unsupported operation.
If session's current top-level browsing context is no longer open, return error with error code no such window.
Try to handle any user prompts with session.
Call fullscreen an element with session's current top-level browsing context's active document's document element.
The window is now in the Fullscreen window state.
Return success with data set to the WindowRect object for the session's current top-level browsing context.
A web element is an abstraction used to identify an element when it is transported via the protocol, between remote and local ends.
The web element identifier is the string constant
"element-6066-11e4-a52e-4f735466cecf
".
An ECMAScript Object represents a web element if it has a web element identifier own property.
The WebDriver node id is a globally unique string representing a handle to a DOM node in a specific WebDriver session.
A weak map is a map in which keys are held weakly i.e. items are removed if the key object is garbaged collected, and presence in the map does not prevent garbage collection. This acts as an alternative to defining properties directly on the key objects.
Unlike the ECMAScript WeakMap, a weak map can participate in the full set of operations available for a Map.
A WebDriver session has a browsing context group node map, which is a weak map between a browsing context group and a node id map.
A node id map is weak map between nodes and their corresponding WebDriver node id.
A WebDriver session has a navigable seen nodes map which is a weak map between a navigable and a set.
To get a node given session, browsing context, and reference:
To get or create a node reference given session, browsing context, and node:
Return node id map[node].
A node reference is known given session, browsing context, and reference if the following steps return true:
To get a known element given session and reference:
Element
return error with error code no such element.
To get or create a web element reference given session and element:
Element
.
The web element reference object for session and element is:
Let identifier be the web element identifier.
Let reference be the result of get or create a web element reference with session and element.
Return a JSON Object initialized with a property with name identifier and value reference.
To deserialize a web element by a JSON Object object that represents a web element:
If object has no own property web element identifier, return error with error code invalid argument.
Let reference be the result of getting the web element identifier property from object.
Let element be the result of trying to get a known element with session and reference.
Return success with data element.
An element is stale if its node document is not the active document or if it is not connected.
To scroll into view an element perform the following steps only if the element is not already in view:
Let options be
the following ScrollIntoViewOptions
:
block
"
end
"
inline
"
nearest
"
Run Function.[[Call]](scrollIntoView, options) with element as the this value.
Editable elements are those that can be used for typing and clearing, and they fall into two subcategories:
Denotes input
elements
that are mutable (e.g. that are not read only or
disabled) and whose type
attribute
is in one of the following states:
And the textarea
element.
Denotes elements that are editing hosts or content editable.
An element is said to have
pointer events disabled
if the resolved value of its "pointer-events
" style property
is "none
".
An element is to be considered read only
if it is an input
element
whose readonly
attribute is set.
In order to determine if an element can be interacted with using pointer actions, WebDriver performs hit-testing to find if the interaction will be able to reach the requested element.
An interactable element is an element which is either pointer-interactable or keyboard-interactable.
A pointer-interactable element is defined to be the first element, defined by the paint order found at the center point of its rectangle that is inside the viewport, excluding the size of any rendered scrollbars.
A keyboard-interactable element
is any element that has a focusable area,
is a body
element,
or is the document element.
An element's in-view center point
is the origin position of the rectangle
that is the intersection between
the element's first DOMRect
of getClientRects
()
and the initial viewport.
Given an element that is known to be in view,
it can be calculated this way:
Let rectangle be
the first element of the DOMRect
sequence
returned by calling getClientRects
()
on element.
Let left be max(0, min(x coordinate, x coordinate + width dimension)).
Let right be min(innerWidth, max(x coordinate, x coordinate + width dimension)).
Let top be max(0, min(y coordinate, y coordinate + height dimension)).
Let bottom be min(innerHeight, max(y coordinate, y coordinate + height dimension)).
Let x be floor((left + right) ÷ 2.0).
Let y be floor((top + bottom) ÷ 2.0).
Return the pair of (x, y).
An element element is disabled if the following steps return true:
If element is an option element or element is an optgroup element:
For each inclusive ancestor ancestor of element:
If ancestor is an optgroup element or ancestor is a select element, and ancestor is actually disabled, return true.
Return false.
Return element is actually disabled.
An element is in view if it is a member of its own pointer-interactable paint tree, given the pretense that its pointer events are not disabled.
An element is obscured if the pointer-interactable paint tree at its center point is empty, or the first element in this tree is not an inclusive descendant of itself.
An element's pointer-interactable paint tree is produced this way:
If element is not in the same tree as session's current browsing context's active document, return an empty sequence.
Let rectangles be
the DOMRect
sequence
returned by calling getClientRects
()
.
If rectangles has the length of 0, return an empty sequence.
Let center point be the in-view center point of the first indexed element in rectangles.
Return the elements from point given the coordinates center point.
A shadow root is an abstraction used to identify a shadow root when it is transported via the protocol, between remote and local ends.
The shadow root identifier is the string constant
"shadow-6066-11e4-a52e-4f735466cecf
".
An ECMAScript Object represents a shadow root if it has a shadow root identifier own property.
To get a known shadow root given session and reference:
ShadowRoot
return error with error code
no such shadow root.
To get or create a shadow root reference given session and shadow root:
ShadowRoot
.
The shadow root reference object for session and shadow root is given by:
Let identifier be the shadow root identifier.
Let reference be the result of get or create a shadow root reference with session and shadow root.
Return a JSON Object initialized with a property with name identifier and value reference.
When required to deserialize a shadow root by a JSON Object object that represents a shadow root:
If object has no own property shadow root identifier, return error with error code invalid argument.
Let reference be the result of getting the shadow root identifier property from object.
Let shadow be the result of trying to get a known shadow root with session and reference.
Return success with data shadow.
A shadow root is detached if its node document is not the active document or if the element node referred to as its host is stale.
The Find Element, Find Elements, Find Element From Element, Find Elements From Element, Find Element From Shadow Root, and Find Elements From Shadow Root commands allow lookup of individual elements and collections of elements. Element retrieval searches are performed using pre-order traversal of the document's nodes that match the provided selector's expression.
When required to find given session, start node, using and value, a remote end must run the following steps:
Let location strategy be equal to using.
Let selector be equal to value.
Let timeout be session's session timeouts' implicit wait timeout.
Let timer be a new timer.
If timeout is not null:
Start the timer with timer and timeout.
Let elements returned be an empty List.
While elements returned is empty and timer's timeout fired flag is not set:
Set elements returned to the result of trying to call the relevant element location strategy with arguments start node, and selector.
DOMException
, SyntaxError
,
XPathException
, or other error occurs during the
execution of the element location strategy, return error
invalid selector.
Let result be an empty List.
For each element in elements returned, append the web element reference object for session and element, to result.
Return success with data result.
An element location strategy is an enumerated attribute deciding what technique should be used to search for elements in session's current browsing context. The following table of location strategies lists the keywords and states defined for this attribute:
State | Keyword |
---|---|
CSS selector | "css selector "
|
Link text selector | "link text "
|
Partial link text selector | "partial link text "
|
Tag name | "tag name "
|
XPath selector | "xpath "
|
To find a web element with the CSS Selector strategy the following steps need to be completed:
Let elements be the result of calling
querySelectorAll
()
with start node as this
and selector as the argument. If this causes an exception
to be thrown, return error with error code
invalid selector.
Return success with data elements.
To find a web element with the Link Text strategy the following steps need to be completed:
Let elements be the result of calling
querySelectorAll
()
with start node as this
and "a
" as the argument. If this throws an exception,
return error with error code unknown error.
Let result be an empty NodeList
.
For each element in elements:
Let rendered text be the value that would be returned via a call to Get Element Text for element.
Let trimmed text be the result of removing all whitespace from the start and end of the string rendered text.
If trimmed text equals selector, append element to result.
Return success with data result.
The Partial link text strategy
is very similar to the Link Text strategy,
but rather than matching the entire string,
only a substring needs to match.
That is, return all a
elements
with rendered text that contains the selector expression.
To find a web element with the Partial Link Text strategy the following steps need to be completed:
Let elements be the result of calling
querySelectorAll
()
with start node as this
and "a
" as the argument. If this throws an exception,
return error with error code unknown error.
Let result be an empty NodeList
.
For each element in elements:
Let rendered text be the value that would be returned via a call to Get Element Text for element.
If rendered text contains selector, append element to result.
Return success with data result.
To find a web element with the Tag Name
strategy return success with data set to the result of
calling getElementsByTagName
()
with
start node as this and selector as the
argument.
To find a web element with the XPath Selector strategy the following steps need to be completed:
Let evaluateResult be the result of
calling evaluate
,
with arguments selector,
start node,
null
,
ORDERED_NODE_SNAPSHOT_TYPE,
and null
.
A snapshot is used to promote operation atomicity.
Let index be 0.
Let length be the result of getting the
property "snapshotLength
"
from evaluateResult. If this throws
an XPathException return error with error
code invalid selector, otherwise if this throws any other
exception return error with error code unknown
error.
Let result be an empty NodeList
.
Repeat, while index is less than length:
If node is not an element return an error with error code invalid selector.
Return success with data result.
HTTP Method | URI Template |
---|---|
POST | /session/{session id}/element |
The remote end steps, given session, URL variables and parameters are:
Let location strategy be the result of getting a
property named "using
" from parameters.
If location strategy is not present as a keyword in the table of location strategies, return error with error code invalid argument.
Let selector be the result of getting a
property named "value
" from parameters.
If selector is undefined, return error with error code invalid argument.
If session's current browsing context is no longer open, return error with error code no such window.
Try to handle any user prompts with session.
Let start node be session's current browsing context's document element.
If start node is null
,
return error with error code no such element.
Let result be the result of trying to Find with session, start node, location strategy, and selector.
If result is empty, return error with error code no such element. Otherwise, return the first element of result.
HTTP Method | URI Template |
---|---|
POST | /session/{session id}/elements |
The remote end steps, given session, URL variables and parameters are:
Let location strategy be the result of getting a
property named "using
" from parameters.
If location strategy is not present as a keyword in the table of location strategies, return error with error code invalid argument.
Let selector be the result of getting a
property named "value
" from parameters.
If selector is undefined, return error with error code invalid argument.
If session's current browsing context is no longer open, return error with error code no such window.
Try to handle any user prompts with session.
Let start node be session's current browsing context's document element.
If start node is null
,
return error with error code no such element.
HTTP Method | URI Template |
---|---|
POST | /session/{session id}/element/{element id}/element |
The remote end steps, given session, URL variables and parameters are:
Let location strategy be the result of getting a
property named "using
" from parameters.
If location strategy is not present as a keyword in the table of location strategies, return error with error code invalid argument.
Let selector be the result of getting a
property named "value
" from parameters.
If selector is undefined, return error with error code invalid argument.
If session's current browsing context is no longer open, return error with error code no such window.
Try to handle any user prompts with session.
Let start node be the result
of trying to get a known element
with session and URL variables["element id
"].
If result is empty, return error with error code no such element. Otherwise, return the first element of result.
HTTP Method | URI Template |
---|---|
POST | /session/{session id}/element/{element id}/elements |
The remote end steps, given session, URL variables and parameters are:
Let location strategy be the result of getting a
property named "using
" from parameters.
If location strategy is not present as a keyword in the table of location strategies, return error with error code invalid argument.
Let selector be the result of getting a
property named "value
" from parameters.
If selector is undefined, return error with error code invalid argument.
If session's current browsing context is no longer open, return error with error code no such window.
Try to handle any user prompts with session.
Let start node be the result
of trying to get a known element
with session and URL variables["element id
"].
HTTP Method | URI Template |
---|---|
POST | /session/{session id}/shadow/{shadow id}/element |
The remote end steps, given session, URL variables and parameters are:
Let location strategy be the result
of getting a property called "using
".
If location strategy is not present as a keyword in the table of location strategies, return error with error code invalid argument.
Let selector be the result
of getting a property called "value
".
If selector is undefined, return error with error code invalid argument.
If the ssession's current browsing context is no longer open, return error with error code no such window.
Handle any user prompts and return its value if it is an error.
Let start node be the result of trying
to get a known shadow root with session
and URL variables["shadow id
"].
If result is empty, return error with error code no such element. Otherwise, return the first element of result.
HTTP Method | URI Template |
---|---|
POST | /session/{session id}/shadow/{shadow id}/elements |
The remote end steps, given session, URL variables and parameters are:
Let location strategy be the result
of getting a property called "using
".
If location strategy is not present as a keyword in the table of location strategies, return error with error code invalid argument.
Let selector be the result
of getting a property called "value
".
If selector is undefined, return error with error code invalid argument.
If session's current browsing context is no longer open, return error with error code no such window.
Handle any user prompts and return its value if it is an error.
Let start node be the result
of trying to get a known shadow root
with session and URL variables["shadow id
"].
HTTP Method | URI Template |
---|---|
GET | /session/{session id}/element/active |
The remote end steps, given session, URL variables and parameters are:
If session's current browsing context is no longer open, return error with error code no such window.
Try to handle any user prompts with session.
Let active element be the active element of session's current browsing context's document element.
If active element is a non-null element, return success with data set to web element reference object for session and active element.
Otherwise, return error with error code no such element.
HTTP Method | URI Template |
---|---|
GET | /session/{session id}/element/{element id}/shadow |
The remote end steps, given session, URL variables and parameters are:
If session's current browsing context is no longer open, return error with error code no such window.
Handle any user prompts and return its value if it is an error.
Let element be the result of trying to get a known element with session and URL variables[element id].
Let shadow root be element's shadow root.
If shadow root is null, return error with error code no such shadow root.
Let serialized be the shadow root reference object for session and shadow root.
Return success with data serialized.
To calculate the absolute position given session and element:
Let rect be the value
returned by calling getBoundingClientRect
()
.
Let window be the associated window of session's current top-level browsing context.
Let x be (scrollX of window + rect's x coordinate).
Let y be (scrollY of window + rect's y coordinate).
Return a pair of (x, y).
To determine if node is not in the same tree as another node, other, run the following substeps:
If the node's node document is not other's node document, return true.
Return true if the result of calling the node's
compareDocumentPosition
()
with other as argument
is DOCUMENT_POSITION_DISCONNECTED
(1),
otherwise return false.
An element's container is:
option
element in a valid element context
optgroup
element in a valid element context
The element's element context, which is determined by:
Let datalist parent be
the first datalist
element reached
by traversing the tree in reverse order from element,
or undefined if the root of the tree is reached.
Let select parent be the
first select
element reached
by traversing the tree in reverse order from element,
or undefined if the root of the tree is reached.
If datalist parent is undefined, the element context is select parent. Otherwise, the element context is datalist parent.
option
element in an invalid element context
The element does not have a container.
The container is the element itself.
HTTP Method | URI Template |
---|---|
GET | /session/{session id}/element/{element id}/selected |
The Is Element Selected command
determines if the referenced element is selected or not.
This operation only makes sense on input
elements
of the Checkbox- and Radio Button states,
or on option
elements.
The remote end steps, given session, URL variables and parameters are:
If session's current browsing context is no longer open, return error with error code no such window.
Try to handle any user prompts with session.
Let element be the result of trying to get a known element with session and URL variables[element id].
Let selected be the value corresponding to the first matching statement:
input
element
with a type
attribute
in the Checkbox- or Radio Button state
The result of element's checkedness.
option
element
The result of element's selectedness.
Return success with data selected.
HTTP Method | URI Template |
---|---|
GET | /session/{session id}/element/{element id}/attribute/{name} |
The remote end steps, given session, URL variables and parameters are:
If session's current browsing context is no longer open, return error with error code no such window.
Try to handle any user prompts with session.
Let element be the result of trying to get a known element with session and URL variables' element id.
Let name be URL variables["name
"].
"true
" (string)
if the element hasAttribute
()
with name,
otherwise null
.
The result of getting an attribute by name name.
Return success with data result.
Please note that the behavior of this command
deviates from the behavior of getAttribute
()
in [DOM],
which in the case of a set boolean attribute
would return an empty string.
The reason this command returns true as a string
is because this evaluates to true in most dynamically typed programming languages,
but still preserves the expected type information.
HTTP Method | URI Template |
---|---|
GET | /session/{session id}/element/{element id}/property/{name} |
The remote end steps, given session, URL variables and parameters are:
If session's current browsing context is no longer open, return error with error code no such window.
Try to handle any user prompts with session.
Let element be the result of trying to get a known element with session and URL variables' element id.
Let name URL variables["name
"].
Let property be the result of calling the Object.[[GetProperty]](name) on element.
Let result be the value of
property if not undefined, or null
.
Return success with data result.
HTTP Method | URI Template |
---|---|
GET | /session/{session id}/element/{element id}/css/{property name} |
The remote end steps, given session, URL variables and parameters are:
If session's current browsing context is no longer open, return error with error code no such window.
Try to handle any user prompts with session.
Let element be the result
of trying to get a known element
with URL variables["element id
"].
Let computed value be the result of the first matching condition:
xml
"
property name
"]
from element's style declarations.
HTTP Method | URI Template |
---|---|
GET | /session/{session id}/element/{element id}/text |
When processing text,
whitespace is defined as characters from the Unicode Character Database
with the Unicode character property "WSpace=Y
" or "WS
".
[UAX44]
The remote end steps, given session, URL variables and parameters are:
If session's current browsing context is no longer open, return error with error code no such window.
Try to handle any user prompts with session.
Let element be the result of trying to get a known element with session and URL variables[element id].
Let rendered text be the result of performing
implementation-specific steps whose result is exactly the same as
the result of
a Function.[[Call]](null
, element)
with bot.dom.getVisibleText
as the this value.
Return success with data rendered text.
HTTP Method | URI Template |
---|---|
GET | /session/{session id}/element/{element id}/name |
The remote end steps, given session, URL variables and parameters are:
If session's current browsing context is no longer open, return error with error code no such window.
Try to handle any user prompts with session.
Let element be the result
of trying to get a known element
with URL variables["element id
"].
Let qualified name be the result of getting
element's tagName
IDL attribute.
Return success with data qualified name.
HTTP Method | URI Template |
---|---|
GET | /session/{session id}/element/{element id}/rect |
The remote end steps, given session, URL variables and parameters are:
If session's current browsing context is no longer open, return error with error code no such window.
Try to handle any user prompts with session.
Let element be the result
of trying to get a known element
with session and URL variables["element id
"].
Let coordinates be calculate the absolute position with session and element.
Let rect be element's bounding rectangle.
Let body be a new JSON Object initialized with:
x
"
y
"
width
"
height
"
Return success with data body.
HTTP Method | URI Template |
---|---|
GET | /session/{session id}/element/{element id}/enabled |
The remote end steps, given session, URL variables and parameters are:
If session's current browsing context is no longer open, return error with error code no such window.
Try to handle any user prompts with session.
Let element be the result of trying to get a known element with session and URL variables[element id].
Let enabled be a boolean initially set to true
if session's current browsing context's
active document's type is not
"xml
".
Otherwise, let enabled to false and jump to the last step of this algorithm.
Set enabled to false if a form control is disabled.
Return success with data enabled.
HTTP Method | URI Template |
---|---|
GET | /session/{session id}/element/{element id}/computedrole |
The remote end steps, given session, URL variables and parameters are:
If session's current browsing context is no longer open, return error with error code no such window.
Try to handle any user prompts with session.
Let element be the result
of trying to get a known element
with URL variables["element id
"].
Let role be the result of computing the WAI-ARIA role of element.
Return success with data role.
HTTP Method | URI Template |
---|---|
GET | /session/{session id}/element/{element id}/computedlabel |
The remote end steps, given session, URL variables and parameters are:
If session's current browsing context is no longer open, return error with error code no such window.
Try to handle any user prompts with session.
Let element be the result of trying
to get a known element with session
and URL variables["element id
"].
Let label be the result of a Accessible Name and Description Computation for the Accessible Name of the element.
Return success with data label.
The element interaction commands provide a high-level instruction set for manipulating form controls. Unlike Actions, they will implicitly scroll elements into view and check that it is an interactable element.
Some resettable elements define their own clear algorithm.
Unlike their associated reset algorithms,
changes made to form controls as part of these algorithms
do count as changes caused by the user
(and thus, e.g. do cause input
events to fire).
When the clear algorithm is invoked
for an element that does not define its own clear algorithm,
its reset algorithm must be invoked instead.
The clear algorithm for input
elements
is to set the dirty value flag and dirty checkedness flag back to false,
set the value of the element to an empty string,
set the checkedness of the element to true
if the element has a checked
content attribute and false if it does not,
empty the list of selected files,
and then invoke the value sanitization algorithm
iff the type
attribute's current state defines one.
The clear algorithm for textarea
elements
is to set the dirty value flag back to false,
and set the raw value of element to an empty string.
The clear algorithm for output
elements
is set the element's value mode flag to default
and then to set the element's textContent
IDL attribute
to an empty string (thus clearing the element's child nodes).
HTTP Method | URI Template |
---|---|
POST | /session/{session id}/element/{element id}/click |
The remote end steps, given session, URL variables and parameters are:
If session's current browsing context is no longer open, return error with error code no such window.
Try to handle any user prompts with session.
Let element be the result of trying to get a known element with session and element id.
If the element is
an input
element in the file upload state
return error with error code invalid argument.
Scroll into view the element's container.
If element's container is still not in view, return error with error code element not interactable.
If element's container is obscured by another element, return error with error code element click intercepted.
Matching on element:
option
element
Let parent node be the element's container.
Fire a mouseOver event at parent node.
Fire a mouseMove event at parent node.
Fire a mouseDown event at parent node.
Run the focusing steps on parent node.
If element is not disabled:
Let previous selectedness be equal to element selectedness.
If element's container
has the multiple
attribute,
toggle the element's selectedness state
by setting it to the opposite value of its current selectedness.
Otherwise, set the element's selectedness state to true.
If previous selectedness is false,
fire a change
event
at parent node.
Fire a mouseUp event at parent node.
Fire a click event at parent node.
Let input state be the result of get the input state given session and session's current top-level browsing context.
Let actions options be a new actions options with the is element origin steps set to represents a web element, and the get element origin steps set to get a WebElement origin.
Let input id be a the result of generating a UUID.
Let source be the result of create an input
source with input state, and "pointer
".
Add an input source with input state, input id and source.
Let click point be the element's in-view center point.
Let pointer move action be an action
object constructed with arguments input id,
"pointer
", and "pointerMove
".
Set a property x
to 0
on
pointer move action.
Set a property y
to 0
on
pointer move action.
Set a property origin
to element on pointer move action.
Let pointer down action be an action
object constructed with arguments input id,
"pointer
", and "pointerDown
".
Set a property button
to 0
on pointer down action.
Let pointer up action be an action
object constructed with arguments input id,
"pointer
", and "pointerUp
" as arguments.
Set a property button
to 0
on pointer up action.
Let actions be the list «pointer move action, pointer down action, pointer up action».
Dispatch a list of actions with input state, actions, session's current browsing context, and actions options.
Remove an input source with input state and input id.
Wait until the user agent event loop has spun enough times to process the DOM events generated by the previous step.
Perform implementation-defined steps to allow any navigations triggered by the click to start.
It is not always clear how long this will cause the algorithm to wait, and it is acknowledged that some implementations may have unavoidable race conditions. The intention is to allow a new attempt to navigate to begin so that the next step in the algorithm is meaningful. It is possible the click does not cause an attempt to navigate, in which case the implementation-defined steps can return immediately, and the next step will also return immediately.
Try to wait for navigation to complete with session.
Try to run the post-navigation checks.
HTTP Method | URI Template |
---|---|
POST | /session/{session id}/element/{element id}/clear |
To clear a content editable element:
If element's innerHTML
IDL attribute
is an empty string do nothing and return.
Run the focusing steps for element.
Set element's innerHTML
IDL attribute
to an empty string.
Run the unfocusing steps for the element.
To clear a resettable element:
Let empty be the result of the first matching condition:
input
element
whose type
attribute is in the File Upload state
If element is a candidate for constraint validation it satisfies its constraints, and empty is true, abort these substeps.
Invoke the focusing steps for element.
Invoke the clear algorithm for element.
Invoke the unfocusing steps for the element.
The remote end steps, given session, URL variables and parameters are:
If session's current browsing context is no longer open, return error with error code no such window.
Try to handle any user prompts with session.
Let element be the result of trying to get a known element with session and element id.
If element is not editable, return an error with error code invalid element state.
Scroll into view the element.
Let timeout be session's session timeouts' implicit wait timeout.
Let timer be a new timer.
If timeout is not null:
Start the timer with timer and timeout.
Wait for element to become interactable, or timer's timeout fired flag to be set, whichever occurs first.
If element is not interactable, return error with error code element not interactable.
Run the substeps of the first matching statement:
Invoke the steps to clear a resettable element.
Invoke the steps to clear a content editable element.
Return error with error code invalid element state.
HTTP Method | URI Template |
---|---|
POST | /session/{session id}/element/{element id}/value |
The Element Send Keys command scrolls into view the form control element and then sends the provided keys to the element. In case the element is not keyboard-interactable, an element not interactable error is returned.
A non-typeable form control
is an input
element
whose type
attribute state
causes the primary input mechanism
not to be through means of a keyboard, whether virtual or physical.
Non-typeable form controls means to refer to
form control elements rendered by the user agent
as something other than as a text input control.
When targetting an input
element
in the color
state
being presented as a color wheel,
interaction with it will be simulated,
rather than typed using key emulation with actions.
Other examples of non-typeable form controls include
form controls interacted with via system-native widgets,
such as a scrolled option list for select
elements
and a number keypad for input
elements
in the number
state on non-desktop devices.
The key input source used for input may be cleared mid-way through “typing” by sending the null key, which is U+E000 (NULL).
To clear the modifier key state given input state, input id, source, undo actions, and browsing context:
If source is not a key input source return error with error code invalid argument.
Let actions options be a new actions options with the is element origin steps set to represents a web element, and the get element origin steps set to get a WebElement origin.
For each entry key in the lexically sorted keys of undo actions:
Let action be the value of undo actions equal to the key entry key.
If action is not an action object with
type "key
" and subtype "keyUp
",
return error with error code invalid
argument.
Let actions be the list «action»
Dispatch a list of actions with input state, actions, browsing context, and actions options.
An extended grapheme cluster is typeable if it consists of a single unicode code point and the code is not undefined.
The shifted state for keyboard is the value
of keyboard's shift
property.
To dispatch the events for a typeable string given input state, input id, source, text, and browsing context:
Let actions options be a new actions options with the is element origin steps set to represents a web element, and the get element origin steps set to get a WebElement origin.
Let global key state be the result of get the global key state with input state.
If char is a shifted character, and the shifted state of source is false:
Let action be an action object
constructed with input id, "key
", and
"keyDown
", and set its value
property
to U+E008 ("left shift").
Let actions be the list «action».
Dispatch a list of actions with input state, actions, and browsing context.
If char is not a shifted character and the shifted state of source is true:
Let action be an action object
constructed with input id, "key
", and
"keyUp
", and set its value
property to
U+E008 ("left shift").
Let tick actions be the list «action».
Dispatch a list of actions with input state, actions, browsing context, and actions options.
Let keydown action be an action object
constructed with arguments input id, "key
",
and "keyDown
".
Set the value
property of keydown
action to char.
Let keyup action be a copy of keydown action
with the subtype property changed to "keyUp
".
Let actions be the list «keydown action, keyup action».
Dispatch a list of actions with input state, actions, browsing context, and actions options.
When required to dispatch a composition event given type and cluster, and browsing context, the remote end must perform implementation-specific action dispatch steps on browsing context equivalent to sending composition events in accordance with the requirements of [UI-EVENTS], and producing the following event with the specified properties.
composition event
with properties:
Attribute | Value |
---|---|
type |
type |
data |
cluster |
To dispatch actions for a string given input state, input id, source, text, browsing context, and actions options:
Let clusters be an array created by breaking text into extended grapheme clusters.
Let undo actions be an empty map.
Let current typeable text be an empty list.
For each cluster corresponding to an indexed property in clusters run the substeps of the first matching statement:
Dispatch the events for a typeable string with input state, input id, source, current typeable text, and browsing context. Empty current typeable text.
Try to clear the modifier key state with input state, input id, source, undo actions and browsing context.
Clear undo actions.
Dispatch the events for a typeable string with input state, input id, source, current typeable text, and browsing context.
Emptycurrent typeable text.
Let keydown action be an action object
constructed with arguments input id,
"key
", and "keyDown
".
Set the value
property of keydown
action to cluster.
Let actions be the list «keydown action»
Dispatch a list of actions with input state, actions, browsing context, and actions options.
Add an entry to undo actions with
key cluster and value being a copy of keydown
action with the subtype property modified to
"keyUp
".
Append cluster to current typeable text.
Dispatch the events for a typeable string with input state, input id, source, current typeable text, and browsing context.
Empty current typeable text.
Dispatch a composition event
with
arguments "compositionstart
", undefined,
and browsing context.
Dispatch a composition event
with arguments
"compositionupdate
", cluster,
and browsing context.
Dispatch a composition event
with arguments
"compositionend
", cluster,
and browsing context.
Dispatch the events for a typeable string with input state, input id and source, current typeable text, and browsing context.
Try to clear the modifier key state with input state, input id, source, undo actions, and browsing context.
The remote end steps, given session, URL variables and parameters are:
Let text be the result
of getting a property named "text
"
from parameters.
If text is not a String, return an error with error code invalid argument.
If session's current browsing context is no longer open, return error with error code no such window.
Try to handle any user prompts with session.
Let element be the result of trying to get a known element with session and URL variables[element id].
Let file be true if element is
input
element in the file upload state, or false
otherwise.
If file is false or the session's strict file interactability, is true run the following substeps:
Scroll into view the element.
Let timeout be session's session timeouts' implicit wait timeout.
Let timer be a new timer.
If timeout is not null:
Start the timer with timer and timeout.
Wait for element to become keyboard-interactable, or timer's timeout fired flag to be set, whichever occurs first.
If element is not keyboard-interactable, return error with error code element not interactable.
If element is not the active element run the focusing steps for the element.
Run the substeps of the first matching condition:
Let files be the result of splitting text
on the newline (\n
) character.
If files is of 0 length, return an error with error code invalid argument.
Let multiple equal the result
of calling hasAttribute
()
with "multiple"
on element.
if multiple is false
and the
length of files is not equal to 1,
return an error with error code invalid argument.
Verify that each file given by the user exists. If any do not, return error with error code invalid argument.
Complete implementation specific steps
equivalent to setting the selected files
on the input
element.
If multiple is true
files are be appended to element's selected files.
Fire these events in order on element:
If element does not have an own property
named value
return an error with error
code element not interactable
If element is not mutable return an error with error code element not interactable.
Set a property value
to text
on element.
If element is suffering from bad input return an error with error code invalid argument.
If element does not currently have focus, let current text length be the length of element's API value.
Set the text insertion caret using set selection range
using current text length for both the start
and end
parameters.
Let input state be the result of get the input state with session and session's current top-level browsing context.
Let input id be a the result of generating a UUID.
Let source be the result of create an input
source with input state, and "key
".
Add an input source with input state, input id and source.
Dispatch actions for a string with arguments input state, input id, and source, text, and session's current browsing context.
Remove an input source with input state and input id.
HTTP Method | URI Template |
---|---|
GET | /session/{session id}/source |
The Get Page Source command returns a string serialization of the DOM of session's current browsing context active document.
The remote end steps, given session, URL variables and parameters are:
If session's current browsing context is no longer open, return error with error code no such window.
Try to handle any user prompts with session.
Let source be the result of invoking the
fragment serializing algorithm on a fictional node whose only
child is the document element providing true
for the
require well-formed
flag. If this causes an exception
to be thrown, let source be null
.
Let source be the result of serializing to string
session's current browsing context's active document,
if source is null
.
Return success with data source.
A collection is an Object that implements the Iterable interface, and whose:
toString
own property is "Arguments
"
Array
DOMTokenList
FileList
HTMLAllCollection
HTMLCollection
HTMLFormControlsCollection
HTMLOptionsCollection
NodeList
To JSON deserialize given session, value and optional argument seen, a remote end must run the following steps:
If seen is not provided, let seen be an empty List.
Jump to the first appropriate step below:
Matching on value:
null
Return success with data value.
Return the deserialized web element of value.
Return the deserialized shadow root of value.
Return the deserialized web frame of value.
Return the deserialized web window of value.
Return clone an object algorithm with session, value and seen, and the JSON deserialize algorithm as the clone algorithm.
To JSON clone given session and value, return the result of internal JSON clone with session, value and an empty List.
To internal JSON clone given session, value and seen, return the value of the first matching statement, matching on value:
null
Return success with data value.
Element
If the element is stale, return error with error code stale element reference.
Otherwise:
Let reference be the web element reference object for session and value.
Return success with data reference.
ShadowRoot
If the shadow root is detached, return error with error code detached shadow root.
Otherwise:
Let reference be the shadow root reference object for session and value.
Return success with data reference.
WindowProxy
object
If the associated browsing context
of the WindowProxy
object
in value has been destroyed,
return error with error code stale element reference.
Otherwise:
Let reference be the
WindowProxy
reference object for value.
Return success with data reference.
toJSON
" that is
a Function
toJSON
) with value
as the this value.
Let result be clone an object with session value and seen, and internal JSON clone as the clone algorithm.
To clone an object, given session, value, seen, and clone algorithm:
If value is in seen, return error with error code javascript error.
Append value to seen.
Let result be the value of the first matching statement, matching on value:
A new Array
which length
property is equal
to the result of getting the property length
of value.
A new Object.
For each enumerable property in value, run the following substeps:
Let name be the name of the property.
Let source property value be the result of getting a property named name from value. If doing so causes script to be run and that script throws an error, return error with error code javascript error.
Let cloned property result be the result of calling the clone algorithm with session, source property value and seen.
If cloned property result is a success, set a property of result with name name and value equal to cloned property result's data.
Otherwise, return cloned property result.
Remove the last element of seen.
When required to extract the script arguments from a request with argument parameters the implementation must:
Let script be the result of getting a
property named "script
" from parameters.
If script is not a String, return error with error code invalid argument.
Let args be the result of getting a property
named "args
" from parameters.
If args is not an Array return error with error code invalid argument.
Let arguments be JSON deserialize with session and args.
Return success with data script and arguments.
The rules to execute a function body are as follows. The algorithm returns an ECMAScript completion record.
If at any point during the algorithm a user prompt appears,
immediately return Completion { [[Type]]: normal
, [[Value]]: null
,
[[Target]]: empty
}, but continue to run the other steps of this algorithm in parallel.
Let window be the associated window of session's current browsing context's active document.
Let environment settings be window's relevant settings object.
If body is not parsable as a FunctionBody
or if parsing detects an early error,
return
Completion { [[Type]]: normal
, [[Value]]: null
, [[Target]]: empty
}.
If body begins with a directive prologue that contains a use strict directive then let strict be true, otherwise let strict be false.
Prepare to run script with environment settings.
Prepare to run a callback with environment settings.
Let function be the result of calling FunctionCreate, with arguments:
Let completion be Function.[[Call]](window, parameters) with function as the this value.
Clean up after running a callback with environment settings.
Clean up after running script with environment settings.
Return completion.
The above algorithm is not associated with any particular element, and is therefore not subject to the document CSP directives.
HTTP Method | URI Template |
---|---|
POST | /session/{session id}/execute/sync |
The remote end steps, given session, URL variables and parameters are:
Let body and arguments be the result of trying to extract the script arguments from a request with argument parameters.
If session's current browsing context is no longer open, return error with error code no such window.
Try to handle any user prompts with session.
Let timeout be session's session timeouts' script timeout.
Let timer be a new timer.
If timeout is not null:
Start the timer with timer and timeout.
Let promise be a new Promise.
Run the following substeps in parallel:
Let scriptPromise be the result of promise-calling execute a function body, with arguments body and arguments.
Upon fulfillment of scriptPromise with value v, resolve promise with value v.
Upon rejection of scriptPromise with value r, reject promise with value r.
Wait until promise is resolved, or timer's timeout fired flag is set, whichever occurs first.
If promise is still pending and timer's timeout fired flag is set, return error with error code script timeout.
If promise is fulfilled with value v, let result be JSON clone with session and v, and return success with data result.
If promise is rejected with reason r, let result be JSON clone with session and r, and return error with error code javascript error and data result.
HTTP Method | URI Template |
---|---|
POST | /session/{session id}/execute/async |
The Execute Async Script command causes JavaScript to execute as an anonymous function. An additional value is provided as the final argument to the function. This is a function that may be invoked to signal the completion of the asynchronous operation. The first argument provided to the function will be serialized to JSON and returned by Execute Async Script.
The remote end steps, given session, URL variables and parameters are:
Let body and arguments by the result of trying to extract the script arguments from a request with argument parameters.
If session's current browsing context is no longer open, return error with error code no such window.
Try to handle any user prompts with session.
Let timeout be session's session timeouts' script timeout.
Let timer be a new timer.
If timeout is not null:
Start the timer with timer and timeout.
Let promise be a new Promise.
Run the following substeps in parallel:
Let resolvingFunctions be CreateResolvingFunctions(promise).
Append resolvingFunctions.[[Resolve]]
to
arguments.
Let result be the result of calling execute a function body, with arguments body and arguments.
If scriptResult.[[Type]] is not normal
, then reject
promise with value scriptResult.[[Value]], and abort these steps.
Prior revisions of this specification did not recognize the return value of the provided script. In order to preserve legacy behavior, the return value only influences the command if it is a "thenable" object or if determining this produces an exception.
If Type(scriptResult.[[Value]]) is not Object, then abort these steps.
Let then be Get(scriptResult.[[Value]], "then").
If then.[[Type]] is not normal
, then reject
promise with value then.[[Value]], and abort these steps.
If IsCallable(then.[[Type]]) is false
,
then abort these steps.
Let scriptPromise be PromiseResolve(Promise, scriptResult.[[Value]]).
Upon fulfillment of scriptPromise with value v, resolve promise with value v.
Upon rejection of scriptPromise with value r, reject promise with value r.
Wait until promise is resolved, or timer's timeout fired flag is set, whichever occurs first.
If promise is still pending and timer's timeout fired flag is set, return error with error code script timeout.
If promise is fulfilled with value v, let result be JSON clone with session and v, and return success with data result.
If promise is rejected with reason r, let result be JSON clone with session and r, and return error with error code javascript error and data result.
The Actions API provides a low-level interface for providing virtualized device input to the web browser. Conceptually, the Actions commands divide time into a series of ticks. The local end sends a series of actions which correspond to the change in state, if any, of each input device during each tick. For example, pressing a key is represented by an action sequence consisting of a single key input device and two ticks, the first containing a keyDown action, and the second a keyUp action, whereas a pinch-zoom input is represented by an action sequence consisting of three ticks and two pointer input devices of type touch, each performing a sequence of actions pointerDown, followed by pointerMove, and then pointerUp.
Configuration of actions dispatch is controlled by a actions options object. This is a struct that has a fields named is element origin, which is a set of steps that validate if a protocol object represents an element origin, and get element origin, which is a set of steps used to deserialize an element.
To get a WebElement origin given session, origin and browsing context:,
Assert: browsing context is the current browsing context.
Let element be equal to the result of trying to get a known element with session and origin.
Return success with data element.
An input source is a virtual device providing input events. Each input source is represented by an struct specific to the type of the input source. Each input source has an input id which is stored as a key in the input state map.
To create an input source given input state, type and optional subtype:
Run the substeps matching the first matching value of type:
none
"
key
"
pointer
"
wheel
"
A null input source is an input source that is not associated with a specific physical device. a null input source has no type-specific items, and supports the following actions:
Action | Non-normative Description |
---|---|
pause | Used with an integer argument to specify the duration of a tick, or as a placeholder to indicate that an input source does nothing during a particular tick. |
To create a null input source, return a new null input source.
A key input source is an input source that is associated with a keyboard-type device.
A key input source has the following items:
Item | Non-normative Description | Default Value |
---|---|---|
pressed | A set of strings representing currently pressed keys. | Empty set |
alt | A boolean indicating whether the alt modifier is depressed. | False |
ctrl | A boolean indicating whether the ctrl modifier is depressed. | False |
meta | A boolean indicating whether the meta modifier is depressed. | False |
shift | A boolean indicating whether the shift modifier is depressed. | False |
A key input source supports the same pause action as a null input source plus the following actions:
Action | Non-normative Description |
---|---|
keyDown | Used to indicate that a particular key should be held down. |
keyUp | Used to indicate that a depressed key should be released. |
To create a key input source, return a new key input source with the items initalized to their default values.
A pointer input source is an input source that is associated with a pointer-type input device.
A pointer input source has the following items:
Item | Non-normative Description | Default Value |
---|---|---|
subtype | The type of pointing device. This can be "mouse ",
"pen ", or "touch ".
| |
pointerId | The numeric id of the pointing device. This is a positive integer, with the values 0 and 1 reserved for mouse-type pointers. | |
pressed | A set of unsigned integers representing the pointer buttons that are currently depressed. | Empty set |
x | An unsigned integer representing the pointer x location in viewport coordinates. | 0 |
y | An unsigned integer representing the pointer y location in viewport coordinates. | 0 |
A pointer input source supports the same pause action as a null input source plus the following actions:
Action | Non-normative Description |
---|---|
pointerDown | Used to indicate that a pointer should be depressed in some way e.g. by holding a button down (for a mouse) or by coming into contact with the active surface (for a touch or pen device). |
pointerUp | Used to indicate that a pointer should be released in some way e.g. by releasing a mouse button or moving a pen or touch device away from the active surface. |
pointerMove | Used to indicate a location on the screen that a pointer should move to, either in its active (pressed) or inactive state. |
pointerCancel | Used to cancel a pointer action. |
To create a pointer input source object given input state, and subtype, return a new pointer input source with subtype set to subtype, pointerId set to get a pointer id with input state and subtype, and the other items set to their default values.
A wheel input source is an input source that is associated with a wheel-type input device. A wheel input source has no type specific items, and supports the same pause action as a null input source plus the following actions:
Action | Non-normative Description |
---|---|
scroll | Used to indicate that the scroll wheel is rolled down, up, right or left to scroll the page down, up, right or left. |
To create a wheel input source return a new wheel input source.
An input state represents the overall state of a collection of input sources. An input state has the following items:
A input state map which is a map where keys are input ids, and the values are input sources.
An input cancel list, which is a list of action objects. This list is used to manage dispatching events when resetting the state of the input source
An actions queue which is a queue that ensures that access to the input state is serialized.
To get the input state given session and browsing context:
Assert: browsing context is a top-level browsing context.
Let input state map be session's browsing context input state map.
If input state map does not contain browsing context, set input state map[browsing context] to create an input state.
Return input state map[browsing context].
To reset the input state given session and browsing context:
Assert: browsing context is a top-level browsing context.
Let input state map be session's browsing context input state map.
If input state map[browsing context] exists, then remove input state map[browsing context].
To create an input state:
Let input state be an input state with the input state map set to an empty map, and the input cancel list set to an empty list.
Return input state.
To add an input source given input state, input id, and source:
Let input state map be input state's input state map.
To remove an input source given input state, and input id:
Assert: None of the items in input state's input cancel list has id equal to input id.
Let input state map be input state's input state map.
To get an input source given input state and input id:
Let input state map be input state's input state map.
If input state map[input id] exists, return input state map[input id].
Return undefined.
To get or create an input source given input state, type, input id, and optional subtype:
Let source be get an input source with input state and input id.
If source is not undefined and source's type is not equal to type, or source is a pointer input source, return error with error code invalid argument.
If source is undefined, set source to the result of trying to create an input source with input state and type.
Return success with data source.
A global key state is a struct with items pressed, altKey, ctrlKey, metaKey, and shiftKey.
To get the global key state given input state:
Let input state map be input state's input state map.
Let sources be the result of getting the values with input state map.
Let key state be a new global key state
with pressed
set to an empty
set, altKey
, ctrlKey
, metaKey
,
and shiftKey
set to false.
For each source in sources:
If source is not a key input source, continue to the first step of this loop.
Set key state's pressed
item to the
union of its current value and source's pressed item.
If source's alt
item is true,
set key state's altKey
item to true.
If source's ctrl
item is true,
set key state's ctrlKey
item to true.
If source's meta
item is true,
set key state's metaKey
item to true.
If source's shift
item is true,
set key state's shiftKey
item to true.
Return key state.
To get a pointer id given input state and subtype:
mouse
", or 2 otherwise.
Let sources be the result of getting the values with input state's input state map.
For each source in sources.:
If source is a pointer input source, append source's pointerId to pointer ids.
Return the smallest integer that is greater than or equal to minimum id and that is not contained in pointer ids.
A tick is the basic unit of time over which actions can be performed. During a tick, each input source has an assigned action — possibly a noop pause action — which may result in changes to the user agent internal state and eventually cause DOM events to be fired at the page. The next tick begins after the user agent has had a chance to process all DOM events generated in the current tick.
Waiting asynchronously means waiting for something to occur whilst allowing the browser to continue processing the event loop.
At the lowest level, the behavior of actions is intended to mimic the remote end's behavior with an actual input device as closely as possible, and the implementation strategy may involve e.g. injecting synthesized events into a browser event loop. Therefore the steps to dispatch an action will inevitably end up in implementation-specific territory. However there are certain content observable effects that must be consistent across implementations. To accommodate this, the specification requires that remote ends perform implementation-specific action dispatch steps on a browsing context context, and a list of events and their properties. These steps must be equivalent to performing the given input device manipulations on context, such that trusted events corresponding to the entries in list of eventsare dispatched.
The algorithm for extracting an action sequence from a request takes the JSON Object representing an action sequence, validates the input, and returns a data structure that is the transpose of the input JSON, such that the actions to be performed in a single tick are grouped together.
To get coordinates relative to an origin given source, x offset, y offset, origin, browsing context, and actions options:
Run the substeps of the first matching value of origin
viewport
"
Let x equal x offset and y equal y offset.
pointer
"
Let start x be equal to the x
property of source.
Let start y be equal to the y
property of source.
Let x equal start x + x offset and y equal start y + y offset.
Let element be the result of trying to run actions options' get element origin steps with origin and browsing context.
If element is null, return error with error code no such element.
Let x element and y element be the result of calculating the in-view center point of element.
Let x equal x element + x offset, and y equal y element + y offset.
Return (x, y)
To extract an action sequence given input state, parameters, and actions options:
Let actions be the result of getting a
property named "actions
" from parameters.
If actions is undefined or is not an Array, return error with error code invalid argument.
Let actions by tick be an empty List.
For each value action sequence corresponding to an indexed property in actions:
Let source actions be the result of trying to process an input source action sequence given input state, action sequence, and actions options.
For each action in source actions:
Return success with data actions by tick.
When required to process an input source action sequence, given input state, action sequence, and actions options, a remote end must:
Let type be the result of getting a property
named "type
" from action sequence.
If type is
not "key
", "pointer
",
"wheel
", or "none
",
return an error with
error code invalid argument.
Let id be the result of
getting the property "id
" from
action sequence.
If id is undefined or is not a String, return error with error code invalid argument.
If type is equal to "pointer
",
let parameters data be the result
of getting the property "parameters
"
from action sequence.
Then let parameters be the result
of trying to process pointer parameters
with argument parameters data.
Let source be the result of trying to get or create an input source given input state, type and id.
If parameters is not undefined,
then if its pointerType
property is not equal to
source's subtype property, return an error
with error code invalid argument.
Let action items be the result of getting a
property named "actions
" from
action sequence.
If action items is not an Array, return error with error code invalid argument.
Let actions be a new list.
For each action item in action items:
If action item is not an Object return error with error code invalid argument.
If type is "none
"
let action be the result of trying to process
a null action with parameters id, and
action item.
Otherwise, if type is "key
"
let action be the result of trying to process
a key action with parameters id, and
action item.
Otherwise, if type is "pointer
"
let action be the result of trying to process
a pointer action with parameters id,
parameters, action item, and actions
options.
Otherwise, if type is "wheel
"
let action be the result of trying to process
a wheel action with parameters id, and
action item, and actions options.
Append action to actions.
Return success with data actions.
The default pointer parameters consist of an object with
property pointerType
set to mouse
.
To process pointer parameters given parameters data:
Let parameters be the default pointer parameters.
If parameters data is undefined, return success with data parameters.
If parameters data is not an Object, return error with error code invalid argument.
Let pointer type be the result
of getting a property named "pointerType
"
from parameters data.
If pointer type is not undefined:
If pointer type does not have one of the values
"mouse
",
"pen
",
or "touch
",
return error with error code invalid argument.
Set the pointerType
property of parameters
to pointer type.
Return success with data parameters.
An action object constructed with arguments id, type, and subtype is an object with property id set to id, type set to type and subtype set to subtype. Specific action objects have further properties added by other algorithms in this specification.
To process a null action given id and action item:
Let subtype be the result of getting a property
named "type
" from action item.
If subtype is not "pause
",
return error with error code invalid argument.
Let action be an action object constructed with arguments
id,
"none"
,
and subtype.
Let result be the result of trying to process a pause action with arguments action item and action.
Return result.
To process a key action given id and action item:
Let subtype be the result of getting a property
named "type
" from action item.
If subtype is not one of the values
"keyUp
",
"keyDown
",
or "pause
",
return an error with error code invalid argument.
Let action be an action object constructed with arguments
id,
"key
",
and subtype.
If subtype is "pause
",
let result be the result
of trying to process a pause action with arguments
action item and action,
and return result.
Let key be the result of getting a property
named "value
" from action item.
If key is not a String containing a single unicode code point or grapheme cluster? return error with error code invalid argument.
Set the value
property on action to key.
Return success with data action.
To process a pointer action given id, parameters, action item, and action options:
Let subtype be the result
of getting a property named "type
"
from action item.
If subtype is not one of the values
"pause
",
"pointerUp
",
"pointerDown
",
"pointerMove
",
or "pointerCancel
",
return an error with error code invalid argument.
Let action be an action object constructed with arguments
id,
"pointer
",
and subtype.
If subtype is "pause
",
let result be the result of trying to
process a pause action with arguments
action item, action, and actions
options, and return result.
Set the pointerType
property of action
equal to the pointerType
property of parameters.
If subtype is "pointerUp
" or "pointerDown
",
process a pointer up or pointer down action with arguments
action item and action.
If doing so results in an error, return that error.
If subtype is "pointerMove
"
process a pointer move action with arguments
action item, action, and actions
options. If doing so results in an error, return
that error.
If subtype is "pointerCancel
"
process a pointer cancel action.
If doing so results in an error, return that error.
Return success with data action.
To process a wheel action given id, action item, and actions options:
Let subtype be the result
of getting a property named "type
"
from action item.
If subtype is not the value
"pause
", or
"scroll
",
return an error with error code invalid argument.
Let action be an action object constructed with arguments
id,
"wheel
",
and subtype.
If subtype is "pause
",
let result be the result of trying to
process a pause action with arguments
action item and action,
and return result.
Let duration be the result of getting a property
named "duration
" from action item.
If duration is not undefined and duration is not an Integer greater than or equal to 0, return error with error code invalid argument.
Set the duration
property of action
to duration.
Let origin be the result of getting the property
origin
from action item.
If origin is undefined let
origin equal "viewport
".
If origin is not equal to "viewport
",
or actions options' is element origin steps given
origin return false, return error with
error code invalid argument.
Set the origin
property of action
to origin.
Let x be the result of getting the property
x
from action item.
If x is not an Integer, return error with error code invalid argument.
Set the x
property of action to x.
Let y be the result of getting the property
y
from action item.
If y is not an Integer, return error with error code invalid argument.
Set the y
property of action to y.
Let deltaX be the result of getting the property
deltaX
from action item.
If deltaX is not an Integer, return error with error code invalid argument.
Set the deltaX
property of action to deltaX.
Let deltaY be the result of getting the property
deltaY
from action item.
If deltaY is not an Integer, return error with error code invalid argument.
Set the deltaY
property of action to deltaY.
Return success with data action.
To process a pause action given action item, and action:
Let duration be the result of getting the
property "duration
" from action item.
If duration is not undefined and duration is not an Integer greater than or equal to 0, return error with error code invalid argument.
Set the duration
property of action
to duration.
Return success with data action.
To process a pointer up or pointer down action given action item, and action:
Let button be the result
of getting the property button
from action item.
If button is not an Integer greater than or equal to 0 return error with error code invalid argument.
Set the button
property of action
to button.
Let width be the result
of getting the property width
from action item.
If width is not undefined and width is not a Number greater than or equal to 0 return error with error code invalid argument.
Set the width
property of action
to width.
Let height be the result
of getting the property height
from action item.
If height is not undefined and height is not a Number greater than or equal to 0 return error with error code invalid argument.
Set the height
property of action
to height.
Let pressure be the result
of getting the property pressure
from action item.
If pressure is not undefined and pressure is not a Number greater than or equal to 0 and less than or equal to 1 return error with error code invalid argument.
Set the pressure
property of action
to pressure.
Let tangentialPressure be the result
of getting the property tangentialPressure
from action item.
If tangentialPressure is not undefined and tangentialPressure is not a Number greater than or equal to -1 and less than or equal to 1 return error with error code invalid argument.
Set the tangentialPressure
property of action
to tangentialPressure.
Let tiltX be the result
of getting the property tiltX
from action item.
If tiltX is not undefined and tiltX is not an Integer greater than or equal to -90 and less than or equal to 90 return error with error code invalid argument.
Set the tiltX
property of action
to tiltX.
Let tiltY be the result
of getting the property tiltY
from action item.
If tiltY is not undefined and tiltY is not an Integer greater than or equal to -90 and less than or equal to 90 return error with error code invalid argument.
Set the tiltY
property of action
to tiltY.
Let twist be the result
of getting the property twist
from action item.
If twist is not undefined and twist is not an Integer greater than or equal to 0 and less than or equal to 359 return error with error code invalid argument.
Set the twist
property of action
to twist.
Let altitudeAngle be the result
of getting the property altitudeAngle
from action item.
If altitudeAngle is not undefined and altitudeAngle is not a Number greater than or equal to 0 and less than or equal to π/2 return error with error code invalid argument.
Set the altitudeAngle
property of action
to altitudeAngle.
Let azimuthAngle be the result
of getting the property azimuthAngle
from action item.
If azimuthAngle is not undefined and azimuthAngle is not a Number greater than or equal to 0 and less than or equal to 2π return error with error code invalid argument.
Set the azimuthAngle
property of action
to azimuthAngle.
Return success with data null
.
To process a pointer move action given action item, action, and actions options:
Let duration be the result
of getting the property duration
from action item.
If duration is not undefined and duration is not an Integer greater than or equal to 0, return error with error code invalid argument.
Set the duration
property of action
to duration.
Let origin be the result
of getting the property origin
from action item.
If origin is undefined let
origin equal "viewport
".
If origin is not equal to "viewport
"
or "pointer
", and actions options is
element origin steps given origin return false,
return error with error code invalid argument.
Set the origin
property of action
to origin.
Let x be the result
of getting the property x
from action item.
If x is not an Integer, return error with error code invalid argument.
Set the x
property of action
to x.
Let y be the result
of getting the property y
from action item.
If y is not an Integer, return error with error code invalid argument.
Set the y
property of action
to y.
Let width be the result
of getting the property width
from action item.
If width is not undefined and width is not a Number greater than or equal to 0 return error with error code invalid argument.
Set the width
property of action
to width.
Let height be the result
of getting the property height
from action item.
If height is not undefined and height is not a Number greater than or equal to 0 return error with error code invalid argument.
Set the height
property of action
to height.
Let pressure be the result
of getting the property pressure
from action item.
If pressure is not undefined and pressure is not a Number greater than or equal to 0 and less than or equal to 1 return error with error code invalid argument.
Set the pressure
property of action
to pressure.
Let tangentialPressure be the result
of getting the property tangentialPressure
from action item.
If tangentialPressure is not undefined and tangentialPressure is not a Number greater than or equal to -1 and less than or equal to 1 return error with error code invalid argument.
Set the tangentialPressure
property of action
to tangentialPressure.
Let tiltX be the result
of getting the property tiltX
from action item.
If tiltX is not undefined and tiltX is not an Integer greater than or equal to -90 and less than or equal to 90 return error with error code invalid argument.
Set the tiltX
property of action
to tiltX.
Let tiltY be the result
of getting the property tiltY
from action item.
If tiltY is not undefined and tiltY is not an Integer greater than or equal to -90 and less than or equal to 90 return error with error code invalid argument.
Set the tiltY
property of action
to tiltY.
Let twist be the result
of getting the property twist
from action item.
If twist is not undefined and twist is not an Integer greater than or equal to 0 and less than or equal to 359 return error with error code invalid argument.
Set the twist
property of action
to twist.
Let altitudeAngle be the result
of getting the property altitudeAngle
from action item.
If altitudeAngle is not undefined and altitudeAngle is not a Number greater than or equal to 0 and less than or equal to π/2 return error with error code invalid argument.
Set the altitudeAngle
property of action
to altitudeAngle.
Let azimuthAngle be the result
of getting the property azimuthAngle
from action item.
If azimuthAngle is not undefined and azimuthAngle is not a Number greater than or equal to 0 and less than or equal to 2π return error with error code invalid argument.
Set the azimuthAngle
property of action
to azimuthAngle.
Return success with data null
.
The algorithm to dispatch actions takes a list of actions grouped by tick, and then causes each action to be run at the appropriate point in the sequence.
To dispatch actions given input state, actions by tick, browsing context, and actions options:
Let token be a new unique identifier.
Enqueue token in input state's actions queue.
Wait for token to be the first item in input state's actions queue.
Let actions result be the result of dispatch actions inner with input state, actions by tick, browsing context, and actions options.
Dequeue input state's actions queue.
Assert: this returns token
Return actions result.
To dispatch actions inner given input state, actions by tick, browsing context, and actions options:
For each item tick actions in actions by tick:
Let tick duration be the result of computing the tick duration with argument tick actions.
Try to dispatch tick actions with input state, tick actions, tick duration, browsing context, and actions options.
Wait until the following conditions are all met:
There are no pending asynchronous waits arising from the last invocation of the dispatch tick actions steps.
The user agent event loop has spun enough times to process the DOM events generated by the last invocation of the dispatch tick actions steps.
At least tick duration milliseconds have passed.
Return success with data null
.
To compute the tick duration given tick actions:
Let max duration be 0.
For each action object in tick actions:
let duration be undefined.
If action object has subtype property set to
"pause
" or action object has type property
set to "pointer
" and subtype property set to
"pointerMove
", or action object has type
property set to "wheel
" and subtype property set to
"scroll
", let duration be equal to
the duration
property of action object.
If duration is not undefined, and duration is greater than max duration, let max duration be equal to duration.
Return max duration.
To dispatch tick actions given input state, tick actions, tick duration, browsing context, and actions options:
For each action object in tick actions:
Let input id be equal to the value of action object's id property.
Let source type be equal to the value of action object's type property.
Let source be the result of get an input source given input state and input id.
Assert: source is not undefined.
Let global key state be the result of get the global key state with input state.
Let subtype be action object's subtype.
Let algorithm be the value of the column dispatch action algorithm from the following table where the source type column is source type and the subtype column is equal to subtype.
source type | subtype | Dispatch action algorithm |
---|---|---|
"none " | "pause " | Dispatch a pause action |
"key " | "pause " | Dispatch a pause action |
"key " | "keyDown " | Dispatch a keyDown action |
"key " | "keyUp " | Dispatch a keyUp action |
"pointer " | "pause " | Dispatch a pause action |
"pointer " | "pointerDown " | Dispatch a pointerDown action |
"pointer " | "pointerUp " | Dispatch a pointerUp action |
"pointer " | "pointerMove " | Dispatch a pointerMove action |
"pointer " | "pointerCancel " | Dispatch a pointerCancel action |
"wheel " | "pause " | Dispatch a pause action |
"wheel " | "scroll " | Dispatch a scroll action |
If subtype is "keyDown
", append
a copy of action object with the subtype
property changed to "keyUp
" to input
state's input cancel list.
If subtype is "pointerDown
", append
a copy of action object with the subtype
property changed to "pointerUp
" to input
state's input cancel list.
To dispatch a list of actions given input state, actions, browsing context, and actions options:
Let tick actions be the list «actions»
Let actions by tick be the list «tick actions».
Return the result of dispatch actions with input state, actions by tick, browsing context, and actions options.
To dispatch a pause action given action object, source, global key state, tick duration, browsing context, and actions options:
The normalized key value for a raw key key is, if key appears in the table below, the string value in the second column on the row containing key's unicode code point in the first column, otherwise it is key.
key's codepoint | Normalized key value |
---|---|
\uE000 | "Unidentified" |
\uE001 | "Cancel" |
\uE002 | "Help" |
\uE003 | "Backspace" |
\uE004 | "Tab" |
\uE005 | "Clear" |
\uE006 | "Return" |
\uE007 | "Enter" |
\uE008 | "Shift" |
\uE009 | "Control" |
\uE00A | "Alt" |
\uE00B | "Pause" |
\uE00C | "Escape" |
\uE00D | " " |
\uE00E | "PageUp" |
\uE00F | "PageDown" |
\uE010 | "End" |
\uE011 | "Home" |
\uE012 | "ArrowLeft" |
\uE013 | "ArrowUp" |
\uE014 | "ArrowRight" |
\uE015 | "ArrowDown" |
\uE016 | "Insert" |
\uE017 | "Delete" |
\uE018 | ";" |
\uE019 | "=" |
\uE01A | "0" |
\uE01B | "1" |
\uE01C | "2" |
\uE01D | "3" |
\uE01E | "4" |
\uE01F | "5" |
\uE020 | "6" |
\uE021 | "7" |
\uE022 | "8" |
\uE023 | "9" |
\uE024 | "*" |
\uE025 | "+" |
\uE026 | "," |
\uE027 | "-" |
\uE028 | "." |
\uE029 | "/" |
\uE031 | "F1" |
\uE032 | "F2" |
\uE033 | "F3" |
\uE034 | "F4" |
\uE035 | "F5" |
\uE036 | "F6" |
\uE037 | "F7" |
\uE038 | "F8" |
\uE039 | "F9" |
\uE03A | "F10" |
\uE03B | "F11" |
\uE03C | "F12" |
\uE03D | "Meta" |
\uE040 | "ZenkakuHankaku" |
\uE050 | "Shift" |
\uE051 | "Control" |
\uE052 | "Alt" |
\uE053 | "Meta" |
\uE054 | "PageUp" |
\uE055 | "PageDown" |
\uE056 | "End" |
\uE057 | "Home" |
\uE058 | "ArrowLeft" |
\uE059 | "ArrowUp" |
\uE05A | "ArrowRight" |
\uE05B | "ArrowDown" |
\uE05C | "Insert" |
\uE05D | "Delete" |
The code for key is the value in the last column of the following table on the row with key in either the first or second column, if any such row exists, otherwise it is undefined.
A shifted character is one that appears in the second column of the following table.
Key | Alternate Key | code |
---|---|---|
"`" | "~" | "Backquote" |
"\" | "|" | "Backslash" |
"\uE003" |
| "Backspace" |
"[" | "{" | "BracketLeft" |
"]" | "}" | "BracketRight" |
"," | "<" | "Comma" |
"0" | ")" | "Digit0" |
"1" | "!" | "Digit1" |
"2" | "@" | "Digit2" |
"3" | "#" | "Digit3" |
"4" | "$" | "Digit4" |
"5" | "%" | "Digit5" |
"6" | "^" | "Digit6" |
"7" | "&" | "Digit7" |
"8" | "*" | "Digit8" |
"9" | "(" | "Digit9" |
"=" | "+" | "Equal" |
"<" | ">" | "IntlBackslash" |
"a" | "A" | "KeyA" |
"b" | "B" | "KeyB" |
"c" | "C" | "KeyC" |
"d" | "D" | "KeyD" |
"e" | "E" | "KeyE" |
"f" | "F" | "KeyF" |
"g" | "G" | "KeyG" |
"h" | "H" | "KeyH" |
"i" | "I" | "KeyI" |
"j" | "J" | "KeyJ" |
"k" | "K" | "KeyK" |
"l" | "L" | "KeyL" |
"m" | "M" | "KeyM" |
"n" | "N" | "KeyN" |
"o" | "O" | "KeyO" |
"p" | "P" | "KeyP" |
"q" | "Q" | "KeyQ" |
"r" | "R" | "KeyR" |
"s" | "S" | "KeyS" |
"t" | "T" | "KeyT" |
"u" | "U" | "KeyU" |
"v" | "V" | "KeyV" |
"w" | "W" | "KeyW" |
"x" | "X" | "KeyX" |
"y" | "Y" | "KeyY" |
"z" | "Z" | "KeyZ" |
"-" | "_" | "Minus" |
"." | "." | "Period" |
"'" | """ | "Quote" |
";" | ":" | "Semicolon" |
"/" | "?" | "Slash" |
"\uE00A" |
| "AltLeft" |
"\uE052" |
| "AltRight" |
"\uE009" |
| "ControlLeft" |
"\uE051" |
| "ControlRight" |
"\uE006" |
| "Enter" |
"\uE00B" |
| "Pause" |
"\uE03D" |
| "MetaLeft" |
"\uE053" |
| "MetaRight" |
"\uE008" |
| "ShiftLeft" |
"\uE050" |
| "ShiftRight" |
" " | "\uE00D" | "Space" |
"\uE004" |
| "Tab" |
"\uE017" |
| "Delete" |
"\uE010" |
| "End" |
"\uE002" |
| "Help" |
"\uE011" |
| "Home" |
"\uE016" |
| "Insert" |
"\uE00F" |
| "PageDown" |
"\uE00E" |
| "PageUp" |
"\uE015" |
| "ArrowDown" |
"\uE012" |
| "ArrowLeft" |
"\uE014" |
| "ArrowRight" |
"\uE013" |
| "ArrowUp" |
"\uE00C" |
| "Escape" |
"\uE031" |
| "F1" |
"\uE032" |
| "F2" |
"\uE033" |
| "F3" |
"\uE034" |
| "F4" |
"\uE035" |
| "F5" |
"\uE036" |
| "F6" |
"\uE037" |
| "F7" |
"\uE038" |
| "F8" |
"\uE039" |
| "F9" |
"\uE03A" |
| "F10" |
"\uE03B" |
| "F11" |
"\uE03C" |
| "F12" |
"\uE019" |
| "NumpadEqual" |
"\uE01A" | "\uE05C" | "Numpad0" |
"\uE01B" | "\uE056" | "Numpad1" |
"\uE01C" | "\uE05B" | "Numpad2" |
"\uE01D" | "\uE055" | "Numpad3" |
"\uE01E" | "\uE058" | "Numpad4" |
"\uE01F" |
| "Numpad5" |
"\uE020" | "\uE05A" | "Numpad6" |
"\uE021" | "\uE057" | "Numpad7" |
"\uE022" | "\uE059" | "Numpad8" |
"\uE023" | "\uE054" | "Numpad9" |
"\uE025" |
| "NumpadAdd" |
"\uE026" |
| "NumpadComma" |
"\uE028" | "\uE05D" | "NumpadDecimal" |
"\uE029" |
| "NumpadDivide" |
"\uE007" |
| "NumpadEnter" |
"\uE024" |
| "NumpadMultiply" |
"\uE027" |
| "NumpadSubtract" |
The key location for key is the value in the
last column in the table below on the row with key appears
in the first column, if such a row exists, otherwise it
is 0
.
key's codepoint | Description | Location |
---|---|---|
\uE007 | Enter | 1 |
\uE008 | Left Shift | 1 |
\uE009 | Left Control | 1 |
\uE00A | Left Alt | 1 |
\uE019 | Numpad = | 3 |
\uE01A | Numpad 0 | 3 |
\uE01B | Numpad 1 | 3 |
\uE01C | Numpad 2 | 3 |
\uE01D | Numpad 3 | 3 |
\uE01E | Numpad 4 | 3 |
\uE01F | Numpad 5 | 3 |
\uE020 | Numpad 6 | 3 |
\uE021 | Numpad 7 | 3 |
\uE022 | Numpad 8 | 3 |
\uE023 | Numpad 9 | 3 |
\uE024 | Numpad * | 3 |
\uE025 | Numpad + | 3 |
\uE026 | Numpad , | 3 |
\uE027 | Numpad - | 3 |
\uE028 | Numpad . | 3 |
\uE029 | Numpad / | 3 |
\uE03D | Left Meta | 1 |
\uE050 | Right Shift | 2 |
\uE051 | Right Control | 2 |
\uE052 | Right Alt | 2 |
\uE053 | Right Meta | 2 |
\uE054 | Numpad PageUp | 3 |
\uE055 | Numpad PageDown | 3 |
\uE056 | Numpad End | 3 |
\uE057 | Numpad Home | 3 |
\uE058 | Numpad ArrowLeft | 3 |
\uE059 | Numpad ArrowUp | 3 |
\uE05A | Numpad ArrowRight | 3 |
\uE05B | Numpad ArrowDown | 3 |
\uE05C | Numpad Insert | 3 |
\uE05D | Numpad Delete | 3 |
To dispatch a keyDown action given action object, source, global key state, tick duration, browsing context, and actions options:
Let raw key be equal to the
action object's value
property.
Let key be equal to the normalized key value for raw key.
If the source's pressed
property
contains key, let repeat be true, otherwise
let repeat be false.
Let code be the code for raw key.
Let location be the key location for raw key.
Let charCode, keyCode
and which be the implementation-specific values of
the charCode
, keyCode
and which
properties appropriate for a key with
key key and location location on a 102 key US
keyboard, following the guidelines in [UI-EVENTS].
If key is "Alt"
, let
source's alt
property be true.
If key is "Shift"
, let
source's shift
property be true.
If key is "Control"
, let
source's ctrl
property be true.
If key is "Meta"
, let
source's meta
property be true.
Add key to source's pressed
property.
Perform implementation-specific action dispatch steps
on browsing context equivalent to pressing a key on the
keyboard in accordance with the requirements of [UI-EVENTS], and
producing the following events, as appropriate, with the specified
properties. This will always produce events including at least
a keyDown
event.
keyDown
with properties:
Attribute | Value |
---|---|
key | key |
code | code |
location | location |
altKey | source's alt property
|
shiftKey | source's shift property
|
ctrlKey | source's ctrl property
|
metaKey | source's meta property
|
repeat | repeat |
isComposing | false |
charCode | charCode |
keyCode | keyCode |
which | which |
keyPress
with properties:
Attribute | Value |
---|---|
key | key |
code | code |
location | location |
altKey | source's alt property
|
shiftKey | source's shift property
|
ctrlKey | source's ctrl property
|
metaKey | source's meta property
|
repeat | repeat |
isComposing | false |
charCode | charCode |
keyCode | keyCode |
which | which |
To dispatch a keyUp action given, action object, source, global key state, tick duration, browsing context, and actions options:
Let raw key be equal to
action object's value
property.
Let key be equal to the normalized key value for raw key.
If the source's pressed
item
does not contain key, return.
Let code be the code for raw key.
Let location be the key location for raw key.
Let charCode, keyCode
and which be the implementation-specific values of
the charCode
, keyCode
and which
properties appropriate for a key with
key key and location location on a 102 key US
keyboard, following the guidelines in [UI-EVENTS].
If key is "Alt
", let
source's alt
property be false.
If key is "Shift
", let
source's shift
property be false.
If key is "Control"
, let
source's ctrl
property be false.
If key is "Meta"
, let
source's meta
property be false.
Remove key
from sources's pressed
property.
Perform implementation-specific action dispatch steps on browsing context equivalent to releasing a key on the keyboard in accordance with the requirements of [UI-EVENTS], and producing at least the following events with the specified properties:
keyup
,
with properties:
Attribute | Value |
---|---|
key | key |
code | code |
location | location |
altKey | source's altKey property |
shiftKey | source's shift property |
ctrlKey | source's ctrl property |
metaKey | source's meta property |
repeat | false |
isComposing | false |
charCode | charCode |
keyCode | keyCode |
which | which |
To dispatch a pointerDown action given action object, source, global key state, tick duration, browsing context, and actions options:
Let pointerType be equal to
action object's pointerType
property.
Let button be equal to
action object's button
property.
If the source's pressed
property
contains button return success with data null
.
Let x be equal to source's
x
property.
Let y be equal to source's
y
property.
Add button to the set corresponding to
source's pressed
property, and
let buttons be the resulting value of that property.
Let width be equal to action object's
width
property.
Let height be equal to action object's
height
property.
Let pressure be equal to action object's
pressure
property.
Let tangentialPressure be equal to
action object's tangentialPressure
property.
Let tiltX be equal to action object's
tiltX
property.
Let tiltY be equal to action object's
tiltY
property.
Let twist be equal to action object's
twist
property.
Let altitudeAngle be equal to action object's
altitudeAngle
property.
Let azimuthAngle be equal to action object's
azimuthAngle
property.
Perform implementation-specific action dispatch steps
on browsing context equivalent to pressing the button
numbered button on the pointer with pointerId equal
to source's pointerId, having
type pointerType at viewport x coordinate x,
viewport y coordinate y, width, height,
pressure, tangentialPressure, tiltX,
tiltY, twist, altitudeAngle,
azimuthAngle, with buttons buttons depressed
in accordance with the requirements of [UI-EVENTS] and
[POINTER-EVENTS]. set ctrlKey
, shiftKey
,
altKey
, and metaKey
equal to the
corresponding items in global key state. Type specific
properties for the pointer that are not exposed through the
webdriver API must be set to the default value specified for
hardware that doesn't support that property.
To dispatch a pointerUp action given, action object, source, global key state, tick duration, browsing context, and actions options:
Let pointerType be equal to
action object's pointerType
property.
Let button be equal to
action object's button
property.
If the source's pressed
property
does not contain button,
return success with data null
.
Let x be equal to source's
x
property.
Let y be equal to source's
y
property.
Remove button from the set corresponding
to source's pressed
property, and
let buttons be the resulting value of that
property.
Perform implementation-specific action dispatch steps
on browsing context equivalent to releasing the button
numbered button on the pointer with pointerId equal
to input source's pointerId, having
type pointerType at viewport x coordinate x,
viewport y coordinate y, with buttons buttons
depressed, in accordance with the requirements of [UI-EVENTS] and
[POINTER-EVENTS]. The generated events must
set ctrlKey
, shiftKey
,
altKey
, and metaKey
equal to the
corresponding items in global key state. Type specific
properties for the pointer that are not exposed through the
webdriver API must be set to the default value specified for
hardware that doesn't support that property.
To dispatch a pointerMove action given action object, source, global key state, tick duration, browsing context, and actions options:
Let x offset be equal to the x
property of action object.
Let y offset be equal to the y
property of action object.
Let origin be equal to the origin
property of action object.
Let (x, y) be the result of trying to get coordinates relative to an origin with source, x offset, y offset, origin, browsing context, and actions options.
If x is less than 0 or greater than the width of the viewport in CSS pixels, then return error with error code move target out of bounds.
If y is less than 0 or greater than the height of the viewport in CSS pixels, then return error with error code move target out of bounds.
Let duration be equal to
action object's duration
property if it
is not undefined, or tick duration
otherwise.
If duration is greater than 0 and inside any implementation-defined bounds, asynchronously wait for an implementation defined amount of time to pass.
Let width be equal to action object's
width
property.
Let height be equal to action object's
height
property.
Let pressure be equal to action object's
pressure
property.
Let tangentialPressure be equal to
action object's tangentialPressure
property.
Let tiltX be equal to action object's
tiltX
property.
Let tiltY be equal to action object's
tiltY
property.
Let twist be equal to action object's
twist
property.
Let altitudeAngle be equal to action object's
altitudeAngle
property.
Let azimuthAngle be equal to action object's
azimuthAngle
property.
Perform a pointer move with arguments source, global key state, duration, start x, start y, x, y, width, height, pressure, tangentialPressure, tiltX, tiltY, twist, altitudeAngle, azimuthAngle.
To perform a pointer move given source, global key state, duration, start x, start y, target x, target y, width, height, pressure, tangentialPressure, tiltX, tiltY, twist, altitudeAngle, and azimuthAngle:
Let time delta be the time since the beginning of the current tick, measured in milliseconds on a monotonic clock.
Let duration ratio be the ratio of time delta and duration, if duration is greater than 0, or 1 otherwise.
If duration ratio is 1, or close enough to 1 that
the implementation will not further subdivide the move action,
let last be true. Otherwise let last
be false
.
If last is true, let x equal target x and y equal target y.
Otherwise let x equal an approximation to duration ratio × (target x - start x) + start x, and y equal an approximation to duration ratio × (target y - start y) + start y.
Let current x equal the x
property
of input state.
Let current y equal the y
property
of input state.
If x is not equal to current x or y is not equal to current y, run the following steps:
Let buttons be equal to input
state's buttons
property.
Perform implementation-specific action dispatch steps
on browsing context equivalent to moving the pointer
with pointerId equal to input source's pointerId,
having type pointerType from viewport x
coordinate current x, viewport y
coordinate current y to viewport x
coordinate x and viewport y
coordinate y, width, height,
pressure, tangentialPressure, tiltX,
tiltY, twist, altitudeAngle,
azimuthAngle, with
buttons buttons depressed, in accordance with the
requirements of [UI-EVENTS] and [POINTER-EVENTS]. The generated
events must set ctrlKey
, shiftKey
,
altKey
, and metaKey
equal to the
corresponding items in global key state. Type specific
properties for the pointer that are not exposed through the
WebDriver API must be set to the default value specified for
hardware that doesn't support that property. In the case where
the pointerType is "pen
" or
"touch
", and buttons is empty, this may be
a no-op. For a pointer of type "mouse
" this will
always produce events including at least
a pointerMove
event.
Let input state's x
property
equal x and y
property
equal y.
If last is true, return.
Run the following substeps in parallel:
Asynchronously wait for an implementation defined amount of time to pass.
Perform a pointer move with arguments input state, duration, start x, start y, target x, target y.
To dispatch a pointerCancel action given action object, source, global key state, tick duration, browsing context, and actions options:
Perform implementation-specific action dispatch steps on browsing context equivalent to cancelling the any action of the pointer with pointerId equal to source's pointerId item. having type pointerType, in accordance with the requirements of [UI-EVENTS] and [POINTER-EVENTS].
To dispatch a scroll action given action object, source, global key state, tick duration, browsing context, and actions options:
Let x offset be equal to the x
property of action object.
Let y offset be equal to the y
property of action object.
Let origin be equal to the origin
property of action object.
Let (x, y) be the result of trying to get coordinates relative to an origin with source, x offset, y offset, origin, browsing context, and actions options.
If x is less than 0 or greater than the width of the viewport in CSS pixels, then return error with error code move target out of bounds.
If y is less than 0 or greater than the height of the viewport in CSS pixels, then return error with error code move target out of bounds.
Let delta x be equal to the deltaX
property of action object.
Let delta y be equal to the deltaY
property of action object.
Let duration be equal to
action object's duration
property if it
is not undefined, or tick duration
otherwise.
If duration is greater than 0 and inside any implementation-defined bounds, asynchronously wait for an implementation defined amount of time to pass.
Perform a scroll with arguments global key state, duration, x, y, delta x, delta y, 0, 0.
To perform a scroll given duration, x, y, target delta x, target delta y, current delta x and current delta y:
Let time delta be the time since the beginning of the current tick, measured in milliseconds on a monotonic clock.
Let duration ratio be the ratio of time delta and duration, if duration is greater than 0, or 1 otherwise.
If duration ratio is 1, or close enough to 1 that
the implementation will not further subdivide the move action,
let last be true. Otherwise let last
be false
.
If last is true, let delta x equal target delta x - current delta x and delta y equal target delta y - current delta y.
Otherwise let delta x equal an approximation to duration ratio × target delta x - current delta x, and delta y equal an approximation to duration ratio × target delta y - current delta y.
If delta x is not equal to 0 or delta y is not equal to 0, run the following steps:
Perform implementation-specific action dispatch steps
on browsing context equivalent to wheel scroll at
viewport x coordinate x, viewport y
coordinate y, deltaX value delta x, deltaY
value delta y, in accordance with the requirements of
[UI-EVENTS]. The generated events must
set ctrlKey
, shiftKey
,
altKey
, and metaKey
equal to the
corresponding items in global key state.
Let current delta x
property
equal delta x + current delta x and
current delta y
property equal
delta y + current delta y.
If last is true, return.
Run the following substeps in parallel:
Asynchronously wait for an implementation defined amount of time to pass.
Perform a scroll with arguments duration, x, y, target delta x, target delta y, current delta x, current delta y.
HTTP Method | URI Template |
---|---|
POST | /session/{session id}/actions |
The remote end steps, given session, URL variables and parameters are:
Let input state be the result of get the input state with session and session's current top-level browsing context.
Let actions options be a new actions options with the is element origin steps set to represents a web element, and the get element origin steps set to get a WebElement origin.
Let actions by tick be the result of trying to extract an action sequence with input state, parameters, and actions options.
If session's current browsing context is no longer open, return error with error code no such window.
Try to handle any user prompts with session.
Dispatch actions with input state, actions by tick, current browsing context, and actions options. If this results in an error return that error.
HTTP Method | URI Template |
---|---|
DELETE | /session/{session id}/actions |
The Release Actions command is used to release all the keys and pointer buttons that are currently depressed. This causes events to be fired as if the state was released by an explicit series of actions. It also clears all the internal state of the virtual devices.
The remote end steps, given session, URL variables and parameters are:
If session's current browsing context is no longer open, return error with error code no such window.
Let input state be the result of get the input state with session and current top-level browsing context.
Let actions options be a new actions options with the is element origin steps set to represents a web element, and the get element origin steps set to get a WebElement origin.
Let undo actions be input state's input cancel list in reverse order.
Try to dispatch tick actions with arguments
undo
actions, 0
,session's current
browsing context, and actions options.
Reset the input state with session and session's current top-level browsing context.
This chapter describes interaction with various types of user prompts. The common denominator for user prompts is that they are modal windows requiring users to interact with them before the event loop is unpaused and control is returned to session's current top-level browsing context.
By default user prompts are not handled automatically unless a user prompt handler has been defined. When a user prompt appears, it is the task of the subsequent command to handle it. If the subsequent requested command is not one listed in this chapter, an unexpected alert open error will be returned.
Whenever active sessions is a list containing exactly one item, and that item is a HTTP session, but is not a BiDi session, then in the steps to fire beforeunload, implementations must act as if showing an unload prompt is likely to be annoying, deceptive, or pointless.
This means that beforeunload prompts are never shown when there's an active HTTP-only session.
A user prompt has an associated user prompt message
that is the string message shown to the user,
or null
if the message length is 0
.
To get the active user prompt given browsing context:
Let agent be browsing context's active document's relevant agent.
If agent's event loop is not currently paused, return null.
Return the user prompt which handles the input required to meet the condition passed when event loop was paused.
The current user prompt is the result of get the active user prompt with current browsing context.
To dismiss a user prompt, act as if the user clicked the Cancel button on that prompt, if present, or otherwise accept the prompt.
To accept a user prompt, act as if the user clicked the OK button on that prompt.
A remote end has a user prompt handler which defines how a WebDriver session will react when a user prompt is displayed. It is either null or a map between strings and prompt handler configuration values. Initially it is null.
A prompt handler configuration is a struct with two items; a handler, which is a string, and a notify, which is a boolean.
To serialize a prompt handler configuration given configuration:
Let serialized be configuration's handler.
If «"dismiss
", "accept
"»
contains serialized,
and configuration's notify is true, append " and notify
"
to serialized.
Return serialized.
Handler key | Description (non-normative). |
---|---|
"dismiss "
| All simple dialogs encountered should be dismissed. |
"accept "
| All simple dialogs encountered should be accepted. |
"dismiss and notify "
| All simple dialogs encountered should be dismissed, and an error returned that the dialog was handled. |
"accept and notify "
| All simple dialogs encountered should be accepted, and an error returned that the dialog was handled. |
"ignore "
| All simple dialogs encountered should be left to the user to handle. |
The valid prompt types are «"alert
",
"beforeUnload
", "confirm
",
"default
", "prompt
"».
The "default
" type represents a fallback
when no specific handler is defined for a given prompt type, including
the "beforeUnload
" prompt type. It can only be set if the
unhandled prompt behavior is a map which
contains "default
". For HTTP-only sessions setting
unhandled prompt behavior as a string value, the value will be assigned to
the internal type "fallbackDefault
". The
"fallbackDefault
" value is not used for the
"beforeUnload
" prompt type, instead it falls back to the
"accept
" handler. This is because HTTP-only sessions do not
allow the "beforeUnload
" handler to be customized, and enabling
other protocols isn't expected to change the user prompt handling as a
side effect.
To deserialize as an unhandled prompt behavior given argument value:
Set value to the result of converting a JSON-derived JavaScript value to an Infra value with value.
If value is not a string, an implementation that does not also support [WebDriver-BiDi] may return error with error code invalid argument.
This is to avoid [WebDriver-BiDi] monkey-patching the current spec.
Let is string value be false.
If value is a string set value to
the map «["fallbackDefault
"
→ value]» and set is string value to true.
If value is not a map return error with error code invalid argument.
For each prompt type → handler in value:
If is string value is false and valid prompt types does not contain prompt type return error with error code invalid argument.
If known prompt handlers does not contain an entry with handler key handler return error with error code invalid argument.
Let notify be false.
If handler is "accept and notify
",
set handler to "accept
"
and notify to true.
If handler is "dismiss and notify
",
set handler to "dismiss
"
and notify to true.
If handler is "ignore
",
set notify to true.
Let configuration be a prompt handler configuration with handler handler and notify notify.
Set user prompt handler[prompt type] to configuration.
Return success with data user prompt handler.
To check user prompt handler matches given requested prompt handler:
If the user prompt handler is null, return true.
For each request prompt type → request handler in requested prompt handler:
If the user prompt handler contains request prompt type:
If the requested prompt handler's handler is not equal to the user prompt handler's handler, return false.
This does not check the requested prompt handler's notify matches the handler, because the notify component only affects the HTTP session, if any.
To update the user prompt handler given requested prompt handler:
If the user prompt handler is null, set the user prompt handler to an empty map.
For each request prompt type → request handler in requested prompt handler:
Set user prompt handler[request prompt type] to request handler.
To serialize the user prompt handler:
If the user prompt handler is null, return
"dismiss and notify
".
If the user prompt handler has size 1,
and user prompt handler contains
"fallbackDefault
", return the result of serialize a prompt
handler configuration with user prompt
handler["fallbackDefault
"].
Let serialized be an empty map.
For each key → value
of user prompt
handler:
Set serialized[key] to serialize a prompt handler configuration with value.
Return convert an Infra value to a JSON-compatible JavaScript value with serialized.
An annotated unexpected alert open error is an error with error code unexpected alert open and an optional error data dictionary with the following entries:
text
"
To get the prompt handler type:
If the user prompt handler is null, let handlers be an empty map. Otherwise let handlers be user prompt handler.
If handlers contains type return handlers[type].
If handlers contains "default
"
return handlers["default
"].
If type is "beforeUnload
", return a
prompt handler configuration with handler "accept
"
and notify false.
If handlers contains "fallbackDefault
"
return handlers["fallbackDefault
"].
Return a prompt handler
configuration with handler "dismiss
" and notify true.
To handle any user prompts:
If the current browsing context is not blocked by a dialog return success.
Let type be "default
".
If the current user prompt is an alert dialog,
set type to "alert
". Otherwise, if
the current user prompt is a beforeunload dialog,
set type to "beforeUnload
". Otherwise, if
the current user prompt is a confirm dialog,
set type to "confirm
". Otherwise, if
the current user prompt is a prompt dialog,
set type to "prompt
".
Let handler be get the prompt handler with type.
Perform the following substeps based on handler's handler:
accept
"
dismiss
"
ignore
"
Do nothing.
If handler's notify is true, return annotated unexpected alert open error.
Return success.
HTTP Method | URI Template |
---|---|
POST | /session/{session id}/alert/dismiss |
The Dismiss Alert command dismisses a simple dialog if present. A request to dismiss an alert user prompt, which may not necessarily have a dismiss button, has the same effect as accepting it.
The remote end steps, given session, URL variables and parameters are:
If session's current top-level browsing context is no longer open, return error with error code no such window.
If the current user prompt is null, return error with error code no such alert.
HTTP Method | URI Template |
---|---|
POST | /session/{session id}/alert/accept |
The remote end steps, given session, URL variables and parameters are:
If session's current top-level browsing context is no longer open, return error with error code no such window.
If the current user prompt is null, return error with error code no such alert.
HTTP Method | URI Template |
---|---|
GET | /session/{session id}/alert/text |
The remote end steps, given session, URL variables and parameters are:
If session's current top-level browsing context is no longer open, return error with error code no such window.
If the current user prompt is null, return error with error code no such alert.
Let message be the text message
associated with the current user prompt,
or otherwise be null
.
Return success with data message.
HTTP Method | URI Template |
---|---|
POST | /session/{session id}/alert/text |
The Send Alert Text command
sets the text field of a window.prompt
user prompt to the given value.
The remote end steps, given session, URL variables and parameters are:
Let text be the result of
getting the property "text
"
from parameters.
If text is not a String, return error with error code invalid argument.
If session's current top-level browsing context is no longer open, return error with error code no such window.
If the current user prompt is null, return error with error code no such alert.
Run the substeps for the API that created the current user prompt:
window.alert
window.confirm
Return error with error code element not interactable.
window.prompt
Do nothing.
Return error with error code unsupported operation.
Perform user agent dependent steps to set the value of current user prompt's text field to text.
Screenshots are a mechanism for providing additional visual diagnostic information. They work by dumping a snapshot of the initial viewport's framebuffer as a lossless PNG image. It is returned to the local end as a Base64 encoded string.
WebDriver provides the Take Screenshot command to capture the top-level browsing context's initial viewport, and a command Take Element Screenshot for doing the same with the visible region of an element's bounding rectangle after it has been scrolled into view.
In order to draw a bounding box from the framebuffer, given a rectangle:
If either the initial viewport's width or height is 0 CSS pixels, return error with error code unable to capture screen.
Let paint width be the initial viewport's width – min(rectangle x coordinate, rectangle x coordinate + rectangle width dimension).
Let paint height be the initial viewport's height – min(rectangle y coordinate, rectangle y coordinate + rectangle height dimension).
Let canvas be a new canvas
element,
and set its width
and height
to paint width and paint height, respectively.
Let context, a canvas context mode, be the result of invoking the 2D context creation algorithm given canvas as the target.
Complete implementation specific steps equivalent to drawing the region of the framebuffer specified by the following coordinates onto context:
Return success with canvas.
To encode a canvas as
Base64 a canvas
element:
If the canvas
element's bitmap's
origin-clean flag is set to false,
return error with error code unable to capture screen.
If the canvas
element's bitmap
has no pixels (i.e. either its horizontal dimension or vertical dimension is zero)
then return error with error code unable to capture screen.
Let file be
a serialization of the canvas
element's bitmap as a file,
using "image/png
" as an argument.
Let index be the index of ",
"
in data URL.
Let encoded string be a substring of data URL using (index + 1) as the start argument.
Return success with data encoded string.
HTTP Method | URI Template |
---|---|
GET | /session/{session id}/screenshot |
The remote end steps, given session, URL variables and parameters are:
If session's current top-level browsing context is no longer open, return error with error code no such window.
When the user agent is next to run the animation frame callbacks:
Let root rect be session's current top-level browsing context's document element's rectangle.
Let screenshot result be the result of trying to call draw a bounding box from the framebuffer, given root rect as an argument.
Let canvas be a canvas
element
of screenshot result's data.
Let encoding result be the result of trying encoding a canvas as Base64 canvas.
Let encoded string be encoding result's data.
Return success with data encoded string.
HTTP Method | URI Template |
---|---|
GET | /session/{session id}/element/{element id}/screenshot |
The Take Element Screenshot command takes a screenshot of the visible region encompassed by the bounding rectangle of an element.
The remote end steps, given session, URL variables and parameters are:
If session's current browsing context is no longer open, return error with error code no such window.
Try to handle any user prompts with session.
Let element be the result of
trying to get a known element with session
and URL variables["element id
"].
Scroll into view the element.
When the user agent is next to run the animation frame callbacks:
Let element rect be element's rectangle.
Let screenshot result be the result of trying to call draw a bounding box from the framebuffer, given element rect as an argument.
Let canvas be a canvas
element
of screenshot result's data.
Let encoding result be the result of trying encoding a canvas as Base64 canvas.
Let encoded string be encoding result's data.
Return success with data encoded string.
The print functions are a mechanism to render the document to a paginated format. It is returned to the local end as a Base64 encoded string containing a PDF representation of the paginated document.
When required to parse a page range with arguments pageRanges and totalPages, an implementation must:
If range is a Number:
Otherwise:
-
" character.
Otherwise:
1
. Otherwise
let lowerBound be the result
of trying to parse as an integer the
first element of rangeParts.
A String is equivalent to an empty string if it has zero length after removing all whitespace characters.
When required to parse as an integer with argument input an implementation must:
U+0030
- U+0039
(i.e. 0 - 9)
inclusive, return error with status invalid argument.
10
.
HTTP Method | URI Template |
---|---|
POST | /session/{session id}/print |
The remote end steps, given session, URL variables and parameters are:
If session's current top-level browsing context is no longer open, return error with error code no such window.
Try to handle any user prompts with session.
Let orientation be the result of getting a
property with default named "orientation
" and with
default "portrait
" from parameters.
If orientation is not a String or does not
have one of the values "landscape
" or
"portrait
", return error with error
code invalid argument.
Let scale be the result of getting a
property with default named "scale
" and with
default 1
from parameters.
If scale is not a Number, or is less
than 0.1
or greater than 2
return error with error code invalid argument.
Let background be the result of getting a
property with default named "background
" and with
default false
from parameters.
If background is not a Boolean return error with error code invalid argument.
Let page be the result of getting a property
with default named "page
" and with a default of an
empty Object from parameters.
Let pageWidth be the result of getting a
property with default named "width
" and with a
default of 21.59
from page.
Let pageHeight be the result of getting a
property with default named "height
" and with a
default of 27.94
from page.
If either of pageWidth or pageHeight is
not a Number, or is less than (2.54 / 72)
, return error
with error code invalid argument.
The minimum page size is 1
point, which is
(2.54 / 72)
as per absolute lengths.
Let margin be the result of getting a property
with default named "margin
" and with a default of an
empty Object from parameters.
Let marginTop be the result of getting a
property with default named "top
" and with a
default of 1
from margin.
Let marginBottom be the result of getting a
property with default named "bottom
" and with a
default of 1
from margin.
Let marginLeft be the result of getting a
property with default named "left
" and with a
default of 1
from margin.
Let marginRight be the result of getting a
property with default named "right
" and with a
default of 1
from margin.
If any of marginTop, marginBottom, marginLeft, or marginRight is not a Number, or is less then 0, return error with error code invalid argument.
Let shrinkToFit be the result of getting a
property with default named "shrinkToFit
" and with
default true
from parameters.
If shrinkToFit is not a Boolean return error with error code invalid argument.
Let pageRanges be the result of getting a
property with default named "pageRanges
" from
parameters with default of an
empty Array.
If pageRanges is not an Array return error with error code invalid argument.
When the user agent is next to run the animation frame
callbacks, let pdfData be the result of trying
to take UA-specific steps to generate a paginated representation of
session's current browsing context, with the
CSS media type set to print
, encoded as a PDF,
with the following paper settings:
Property | Value |
---|---|
Width in cm | pageWidth if orientation is
"portrait " otherwise pageHeight
|
Height in cm | pageHeight if orientation is
"portrait " otherwise pageWidth
|
Top margin, in cm | marginTop |
Bottom margin, in cm | marginBottom |
Left margin, in cm | marginLeft |
Right margin, in cm | marginRight |
In addition, the following formatting hints should be applied by the UA:
1
false
true
If pageRanges is not an empty Array, Let pages be the result of trying to parse a page range with arguments pageRanges and the number of pages contained in pdfData, then remove any pages from pdfData whose one-based index is not contained in pages
Let encoding result be the result of calling Base64 Encode on pdfData.
Let encoded string be encoding result's data.
Return success with data encoded string
It is advisable that remote ends create a new profile when creating a new session. This prevents potentially sensitive session data from being accessible to new sessions, ensuring both privacy and preventing state from bleeding through to the next session.
A user agent can rely on a command-line flag or a configuration option to test whether to enable WebDriver, or alternatively make the user agent initiate or confirm the connection through a privileged content document or control widget, in case the user agent does not directly implement the HTTP endpoints.
It is strongly suggested that user agents require users to take explicit action to enable WebDriver, and that WebDriver remains disabled in publicly consumed versions of the user agent.
To prevent arbitrary machines on the network from connecting and creating sessions, it is suggested that only connections from loopback devices are allowed by default.
The remote end can include
a configuration option to limit
the accepted IP range allowed to connect and make requests.
The default setting for this might be
to limit connections to the IPv4 localhost
CIDR range 127.0.0.0/8
and the IPv6 localhost address ::1
. [RFC4632]
It is also suggested that user agents make an effort to visually distinguish a user agent session that is under control of WebDriver from those used for normal browsing sessions. This can be done through a browser chrome element such as a “door hanger”, colorful decoration of the OS window, or some widget element that is prevalent in the window so that it easy to identify automation windows.
Although WebDriver does not define a primitive to ascertain the visibility of an element in the viewport, we acknowledge that it is an important feature for many users. Here we include a recommended approach which will give a simplified approximation of an element's visibility, but please note that it relies only on tree-traversal, and only covers a subset of visibility checks.
The visibility of an element is guided
by what is perceptually visible to the human eye.
In this context, an element's displayedness
does not relate to the visibility
or display
style properties.
The approach recommended to implementors to ascertain an element's visibility was originally developed by the Selenium project, and is based on crude approximations about an element's nature and relationship in the tree. An element is in general to be considered visible if any part of it is drawn on the canvas within the boundaries of the viewport.
The element displayed state is a boolean representing whether an element is currently visible.
To get the element displayed state using
the bot.dom.isShown
Selenium atoms,
given element:
Let function be
the bot.dom.isShown
function.
Let result be the result of calling function's [[Call]] internal method with arguments null and element. If this raises an exception, return an error with error code unknown error.
Return success with data result.
The element displayed state is typically exposed as an
endpoint for GET
requests with a URI Template of
/session/{session id}/element/{element id}/displayed
.
There have been a lot of people that have helped make browser automation possible over the years and thereby furthered the goals of this standard. In particular, thanks goes to the Selenium Open Source community, without which this standard would never have been possible.
This standard is authored by Aleksey Chemakin, Andreas Tolfsen, Andrey Botalov, Brian Burg, Christian Bromann, Clayton Martin, Daniel Wagner-Hall, David Burns, Dominique Hazael-Massieux, Eran Messeri, Erik Wilde, Gábor Csárdi, Henrik Skupin, James Graham, Jason Juang, Jason Leyba, Jim Evans, John Chen, John Jansen, Jonathan Lipps, Jonathon Kereliuk, Luke Inman-Semerau, Maja Frydrychowicz, Malini Das, Manoj Kumar, Marc Fisher, Mike Pennisi, Ondřej Machulda, Randall Kent, Sam Sneddon, Seva Lotoshnikov, Simon Stewart, Sri Harsha, Titus Fortner, and Vangelis Katsikaros. The work is coordinated and edited by David Burns and Simon Stewart.
Thanks to Berge Schwebs Bjørlo, Lukas Tetzlaff, Malcolm Rowe, Michael[tm] Smith, Nathan Bloomfield, Philippe Le Hégaret, Robin Berjon, Ross Patterson, and Wilhelm Joys Andersen for proofreading and suggesting areas for improvement.
This specification relies on several other underlying specifications.
The following terms are defined in the Accessible Rich Internet Applications (WAI-ARIA) 1.2 specification: [wai-aria-1.2]
The following terms are defined in the Accessible Name and Description Computation 1.1 specification: [accname-1.1]
The following terms are defined in the Content Security Policy Level 3 specification: [CSP3]
The following terms are defined in The Base16, Base32, and Base64 Data Encodings specification: [RFC4648]
The following terms are defined in the DOM Parsing and Serialization specification: [DOM-PARSING]
The following attributes are defined in the UI Events specification: [UI-EVENTS]
The following attributes are defined in the UI Events Code specification: [UIEVENTS-KEY]
The following terms are defined in the ECMAScript Language Specification: [ECMA-262]
The following terms are defined in the WHATWG Encoding specification: [ENCODING]
The following terms are defined in the WHATWG Fetch specification: [FETCH]
The following terms are defined in the WHATWG Fullscreen specification: [FULLSCREEN]
The following terms are defined in the HTML specification: [HTML]
activeElement
attribute on Document
Document
object
[[GetOwnProperty]]
of a Window
object
Window
object
WindowProxy
exotic object
setSelectionRange
confirm
alert
prompt
The HTML specification also defines states
of the input
element:
The HTML specification also defines a range of different attributes:
The HTML Editing APIs specification defines the following terms: [EDITING]
The following events are also defined in the HTML specification:
The “data” URL scheme specification defines the following terms: [RFC2397]
To be HTTP compliant, it is supposed that the implementation supports the relevant subsets of [RFC7230], [RFC7231], [RFC7232], [RFC7234], and [RFC7235].
The following terms are defined in the Cookie specification: [RFC6265]
The following terms are defined in the Same Site Cookie specification: [RFC6265bis]
The following terms are defined in the Hypertext Transfer Protocol (HTTP) Status Code Registry:
The following terms are defined in the Infra specification: [INFRA]
The specification uses URI Templates. [URI-TEMPLATE]
hidden
visibilityState
attribute on Document
visible
33c6b7841a59aaaad55744909c0600f066fd5593
.
visibility
property
display
property
The following terms are defined in the standard: [RFC1928]
The IDL fragments in this specification must be interpreted as required for conforming IDL fragments, as described in the Web IDL specification. [WEBIDL]
The following terms are defined in the Promises Guide. [PROMISES-GUIDE]
The following terms are defined in the Document Object Model XPath standard [XPATH]
[[Call]]
internal slot for Function
§E.[[GetOwnProperty]]
internal slot for Object
§E.
§E.[[GetProperty]]
internal slot for Object
§E.