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HTMLMediaElement: readyState property

The HTMLMediaElement.readyState property indicates the readiness state of the media.

Value

An unsigned short. Possible values are:

Constant Value Description
HAVE_NOTHING 0 No information is available about the media resource.
HAVE_METADATA 1 Enough of the media resource has been retrieved that the metadata attributes are initialized. Seeking will no longer raise an exception.
HAVE_CURRENT_DATA 2 Data is available for the current playback position, but not enough to actually play more than one frame.
HAVE_FUTURE_DATA 3 Data for the current playback position as well as for at least a little bit of time into the future is available (in other words, at least two frames of video, for example).
HAVE_ENOUGH_DATA 4 Enough data is available—and the download rate is high enough—that the media can be played through to the end without interruption.

Examples

This example will listen for audio data to be loaded for the element example. It will then check if at least the current playback position has been loaded. If it has, the audio will play.

html

<audio id="example" preload="auto">
  <source src="sound.ogg" type="audio/ogg" />
</audio>

js

const obj = document.getElementById("example");

obj.addEventListener("loadeddata", () => {
  if (obj.readyState >= 2) {
    obj.play();
  }
});

Specifications

Specification
HTML Standard
# dom-media-readystate-dev

Browser compatibility

Desktop Mobile
Chrome Edge Firefox Internet Explorer Opera Safari WebView Android Chrome Android Firefox for Android Opera Android Safari on IOS Samsung Internet
readyState 3 12 3.5 5.5 ≤12.1 3.1 ≤37 18 4 ≤12.1 3 1.0

See also

  • HTMLMediaElement: Interface used to define the HTMLMediaElement.readyState property

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https://developer.mozilla.org/en-US/docs/Web/API/HTMLMediaElement/readyState