< HTML Audio/Video DOM Reference
Example
Change the playing speed of a video and alert that the speed was changed:
// Get the <video> element with id="myVideo"
var vid =
document.getElementById("myVideo");
// Set the current playback speed
of the video to 0.3 (slow motion)
function setPlaySpeed() {
vid.playbackRate = 0.3;
}
// Assign a ratechange event to the
<video> element, and execute a function if the playing speed of the video is
changed. The function will alert some text
vid.onratechange = function()
{myFunction()};
function
myFunction() {
alert("The playing speed of the video
was changed");
}
Try it Yourself »
Definition and Usage
The ratechange event occurs when the playing speed of the audio/video is changed (like when a user switches to a slow motion or fast forward mode).
This event is invoked by the playbackRate property of the Audio/Video Object, which sets or returns the current playback speed of an audio/video.
Browser Support
The numbers in the table specify the first browser version that fully supports the event.
| Event | |||||
|---|---|---|---|---|---|
| ratechange | Yes | 9.0 | Yes | Yes | Yes |
Syntax
In HTML:
<audio|video onratechange="myScript">Try it
In JavaScript:
audio|video.onratechange=function(){myScript};Try it
In JavaScript, using the addEventListener() method:
audio|video.addEventListener("ratechange", myScript);Try it
Note: The addEventListener() method is not supported in Internet Explorer 8 and earlier versions.
Technical Details
| Supported HTML tags: | <audio> and <video> |
|---|---|
| Supported JavaScript objects: | Audio, Video |