This is an experimental technologyCheck the Browser compatibility table carefully before using this in production.
The readyState
read-only property of the MediaSource
interface returns an enum representing the state of the current MediaSource
. The three possible values are:
closed
: The source is not currently attached to a media element.open
: The source is attached to a media element and ready to receiveSourceBuffer
objects.ended
: The source is attached to a media element but the stream has been ended via a call toMediaSource.endOfStream()
.
Syntax
var myReadyState = mediaSource.readyState;
Value
A DOMString
.
Example
The following snippet is from a simple example written by Nick Desaulniers (view the full demo live, or download the source for further investigation.)
if ('MediaSource' in window && MediaSource.isTypeSupported(mimeCodec)) {
var mediaSource = new MediaSource;
//console.log(mediaSource.readyState); // closed
video.src = URL.createObjectURL(mediaSource);
mediaSource.addEventListener('sourceopen', sourceOpen);
} else {
console.error('Unsupported MIME type or codec: ', mimeCodec);
}
function sourceOpen (_) {
//console.log(this.readyState); // open
var mediaSource = this;
var sourceBuffer = mediaSource.addSourceBuffer(mimeCodec);
fetchAB(assetURL, function (buf) {
sourceBuffer.addEventListener('updateend', function (_) {
mediaSource.endOfStream();
video.play();
//console.log(mediaSource.readyState); // ended
});
sourceBuffer.appendBuffer(buf);
});
};
Specifications
Specification | Status | Comment |
Media Source ExtensionsThe definition of 'readyState' in that specification. | Recommendation | Initial definition. |
Browser compatibility
The compatibility table on this page is generated from structured data. If you'd like to contribute to the data, please check out https://github.com/mdn/browser-compat-data and send us a pull request.
Update compatibility data on GitHub
Desktop | Mobile | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
|
Chrome
Full support 23 |
Edge
Full support 12 |
Firefox Full support 42 Full support 42 No support 25 — 42 Notes' Limited support to an allowed list of sites, for example YouTube, Netflix, and other popular streaming sites. The limitation was removed when Media Source Extensions was enabled by default in Firefox 42.
Disabled' From version 25 until version 42 (exclusive): this feature is behind the |
IE Full support 11 Full support 11 Notes' Only works on Windows 8+. |
Opera
Full support 15 |
Safari
Full support 8 |
WebView Android
Full support 4.4.3 |
Chrome Android
Full support 33 |
Firefox Android
Full support 41 |
Opera Android
Full support 14 |
Safari iOS
No support No |
Samsung Internet Android
Full support 2.0 |
Legend
- Full support
- Full support
- No support
- No support
- Experimental. Expect behavior to change in the future.'
- Experimental. Expect behavior to change in the future.
- See implementation notes.'
- See implementation notes.
- User must explicitly enable this feature.'
- User must explicitly enable this feature.
See also
MediaSource.readyState by Mozilla Contributors is licensed under CC-BY-SA 2.5.