From W3C Wiki
The <object> element represents can represent an external resource, which, depending on the type of the resource, will either be treated as an image, as a nested browsing context, or as an external resource to be processed by a plugin.
- Example of external resource:
Authors should ensure that the information and user interface components must be presentable to users in ways they can perceive (WCAG 2.0 - Principle 1: Perceivable). This includes providing alternatives for time-based media Guideline 1.2.
data= URL potentially surrounded by spaces
Specifies the address of the resource.
type= MIME type
Specifies the type of the resource.
Gives the name of the input element.
usemap= hash-name reference
Specifies a hash-name reference to a map element with which to associate the object.
form= the ID of a form element in the element's owner
Associate the object element with its form owner.
width= non-negative integer
Give the width of the visual content of the element, in CSS pixels.
height= non-negative integer
Give the height of the visual content of the element, in CSS pixels.
The following attributes are obsolete, and must not be used by authors:
The following example shows how a plugin can be used in HTML (in this case the Flash plugin, to show a video file). Fallback is provided for users who do not have Flash enabled, in this case using the video element to show the video for those using user agents that support video, and finally providing a link to the video for those who have neither Flash nor a video-capable browser [try it]
<p>Look at my video: <object type="application/x-shockwave-flash"> <param name=movie value="http://video.example.com/library/watch.swf"> <param name=allowfullscreen value=true> <param name=flashvars value="http://video.example.com/vids/315981"> <video controls src="http://video.example.com/vids/315981"> <a href="http://video.example.com/vids/315981">View video</a>. </video> </object> </p>
<figure> <object type="application/x-java-applet"> <param name="code" value="MyJavaClass"> <p>You do not have Java available, or it is disabled.</p> </object> <figcaption>My Java Clock</figcaption> </figure>
In this example, an HTML page is embedded in another using the object element [try it]:
<figure> <object data="clock.html"></object> <figcaption>My HTML Clock</figcaption> </figure>
The HTML5 specification defines the <object> element in 4.8.4 The object element.