The seekable read-only property of the HTMLMediaElement returns a TimeRanges object that contains the time ranges that the user is able to seek to, if any.


var seekable = audioOrVideo.seekable;


A TimeRanges object.


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.

<audio id="example" preload="auto">
 <source src="sound.ogg" type="audio/ogg" />
var obj = document.getElementById('example');

obj.addEventListener('loadeddata', function() {

  if(obj.readyState >= 2) {;




Specification Status Comment
WHATWG HTML Living Standard
The definition of 'HTMLMediaElement' in that specification.
Living Standard No change from HTML5
The definition of 'HTMLMediaElement' in that specification.
Recommendation Initial definition.
Media Source Extensions
The definition of 'HTMLMediaElement extensions, like for seekable' in that specification.
Candidate Recommendation Specifies a new algorithm for returning the seekable time range of a media element whose source is a MediaSource object.

Browser compatibility

Feature Chrome Firefox (Gecko) Internet Explorer Opera Safari (WebKit)
Basic support (Yes) 8.0 (8.0) 9 ? ?
Using seekable along with MSE 23 25.0 (25.0)[1]
42.0 (42.0)
11[2] 15 8
Feature Android Firefox Mobile (Gecko) Firefox OS (Gecko) IE Phone Opera Mobile Safari Mobile
Basic support (Yes) 8.0 (8.0) (Yes) ? ? ?
Using seekable along with MSE 4.4.4

Not supported

Not supported 11 30 Not supported

[1] Available after switching the about:config preference media.mediasource.enabled to true. In addition, support was limited to a whitelist of sites, for example YouTube, Netflix, and other popular streaming sites. The whitelist was removed and Media Source Extensions was enabled by default in 42+ for all sites.

[2] Only works on Windows 8+.

See also


© 2016 Mozilla Contributors
Licensed under the Creative Commons Attribution-ShareAlike License v2.5 or later.

API Audio Extensions HTMLMediaElement Media MSE Property Reference seekable source Source Video