Global Attributes

The following attributes are supported by all HTML elements.

Core Attributes

Event-handler Attributes

• onabort = string
  Load of element was aborted by the user.
• onblur = string
  Element lost focus.
• oncanplay = string
  The UA can resume playback of media data for this video or audio element, but estimates that if playback were to be started now, the video or audio could not be rendered at the current playback rate up to its end without having to stop for further buffering of content.
• oncanplaythrough = string
  The UA estimates that if playback were to be started now, the video or audio element could be rendered at the current playback rate all the way to its end without having to stop for further buffering
• onchange = string
  User committed a change to the value of element (form control).
• onclick = string
  User pressed pointer button down and released pointer button over element, or otherwise activated the pointer in a manner that emulates such an action.
• oncontextmenu = string
  User requested the context menu for element.
• ondblclick = string
  User clicked pointer button twice over element, or otherwise activated the pointer in a manner that simulates such an action.
• ondrag = string
  User is continuing to drag element.
• ondragend = string
  User ended dragging element.
• ondragenter = string
  User’s drag operation entered element.
• ondragleave = string
  User’s drag operation left element.
• ondragover = string
  User is continuing drag operation over element.
• ondragstart = string
  User started dragging element.
• ondrop = string
  User completed drop operation over element.
• ondurationchange = string
  The DOM attribute duration on the video or audio element has been updated.
• onemptied = string
  The video or audio element has returned to the uninitialized state.
• onended = string
  The end of the video or audio element has been reached.
• onerror = string
  Element failed to load properly.
• onfocus = string
  Element received focus.
• onformchange = string
  User committed a change to the value of a form control in the form to which the element belongs.
• onforminput = string
  User changed the value of a form control in the form to which the element belongs.
• oninput = string
  User changed the value of element (form control).
• oninvalid = string
  Element (form control) did not meet validity constraints.
• onkeydown = string
  User pressed down a key.
• onkeypress = string
  User pressed down a key that is associated with a character value.
• onkeyup = string
  User release a key.
• onload = string
  Element finished loading.
• onloadeddata = string
  UA can render the video or audio element at the current playback position for the first time.
• onloadedmetadata = string
  UA has just determined the duration and dimensions of the video or audio element.
• onloadstart = string
  UA has begun looking for media data in the video or audio element.
• onmousedown = string
  User pressed down pointer button over element.
• onmousemove = string
  User moved mouse.
• onmouseout = string
  User moved pointer off boundaries of element.
• onmouseover = string
  User moved pointer into boundaries of element or one of its descendant elements.
• onmouseup = string
  User released pointer button over element.
• onmousewheel = string
  User rotated wheel of mouse or other device in a manner that emulates such an action.
• onpause = string
  User has paused playback of the video or audio element.
• onplay = string
  UA has initiated playback of the video or audio element.
• onplaying = string
  Playback of the video or audio element has started.
• onprogress = string
  UA is fetching media data for the video or audio element.
• onratechange = string
  Either the DOM attribute defaultPlaybackRate or the DOM attribute playbackRate on the video or audio element has been updated.
• onreadystatechange = string
  Element and all its subresources have finished loading.
• onscroll = string
  Element or document view was scrolled.
• onseeked = string
  The value of the IDL attribute seeking changed to false (a seek operation on the video or audio element ended).
• onseeking = string
  The value of the IDL attribute seeking changed to true, and the seek operation on the video or audio elements is taking long enough that the UA has time to fire the seeking event.
• onselect = string
  User selected some text.
• onshow = string
  User requested the element be shown as a context menu.
• onstalled = string
  UA is attempting to fetch media data for the video or audio element, but that data is not forthcoming.
• onsubmit = string
  The form element was submitted.
• onsuspend = string
  UA is intentionally not currently fetching media data for the video or audio element, but does not yet have the entire contents downloaded.
• ontimeupdate = string
  The current playback position of the video or audio element changed either as part of normal playback, or in an especially interesting way (for example, discontinuously).
• onvolumechange = string
  Either the DOM attribute volume or the DOM attribute muted on the video or audio element has been changed.
• onwaiting = string
  Playback of the video or audio element has stopped because the next frame is not yet available (but UA agent expects that frame to become available in due course).

XML Attributes

• xml:lang = language tag
  As defined in the XML specification [XML].
  A valid language tag, as defined in [BCP47].
• xml:space = "preserve"
  As defined in the XML specification [XML].
  The xml:space attribute should only be used with documents in the XML syntax; it must not be used in documents in the HTML syntax.
• xml:base = URL potentially surrounded by spaces
  As defined in the XML Base specification [XMLBase].
  The xml:base attribute should only be used with documents in the XML syntax; it must not be used in documents in the HTML syntax.