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The HTMLTrackElement interface provides access to the properties of <track> elements, as well as methods to manipulate them.
Properties
Inherits properties from its parent, HTMLElement.
HTMLTrackElement.kind- Is a
DOMStringthat reflects thekindHTML attribute, indicating how the text track is meant to be used. Possible values are: subtitles, captions, descriptions, chapters, metadata. HTMLTrackElement.src- Is a
DOMStringthat reflects thesrcHTML attribute, indicating the address of the text track data. HTMLTrackElement.srclang- Is a
DOMStringthat reflects thesrclangHTML attribute, indicating the language of the text track data. HTMLTrackElement.label- Is a
DOMStringthat reflects thelabelHTML attribute, indicating a user-readable title for the track. HTMLTrackElement.default- Is a
Booleanreflects thedefaultHTML attribute, indicating that the track is to be enabled if the user's preferences do not indicate that another track would be more appropriate. HTMLTrackElement.readyStateRead only- Returns an
unsigned shortConstant Value Description NONE0 Indicates that the text track's cues have not been obtained. LOADING1 Indicates that the text track is loading and there have been no fatal errors encountered so far. Further cues might still be added to the track by the parser. LOADED2 Indicates that the text track has been loaded with no fatal errors. ERROR3 Indicates that the text track was enabled, but when the user agent attempted to obtain it, this failed in some way. Some or all of the cues are likely missing and will not be obtained. HTMLTrackElement.trackRead only- Returns
TextTrackis the track element's text track data.
track Read only |
TextTrack |
The track element's text track data. |
Methods
No specific method; inherits methods from its parent, HTMLElement.
Specifications
| Specification | Status | Comment |
|---|---|---|
| WHATWG HTML Living Standard The definition of 'HTMLTrackElement' in that specification. |
Living Standard | No change from HTML5. |
| HTML5 The definition of 'HTMLTrackElement' in that specification. |
Recommendation | Initial definition. |
Browser compatibility
| Feature | Chrome | Firefox (Gecko) | Internet Explorer | Opera | Safari (WebKit) |
|---|---|---|---|---|---|
| Basic support | ? | 24 (24)[1] | ? | ? | ? |
src attribute settable |
? | 50 (50)[2][3] | ? | ? | ? |
| Feature | Android | Firefox Mobile (Gecko) | IE Phone | Opera Mobile | Safari Mobile |
|---|---|---|---|---|---|
| Basic support | ? | 24.0 (24)[1] | ? | ? | ? |
src attribute settable |
? | 50.0 (50)[2][3] | ? | ? | ? |
[1] The HTMLTrackElement interface was added in Firefox 24, but was disabled by default behind the preference media.webvtt.enabled. The interface is enabled by default (along with all other WebVTT features) in Firefox 31.
[2] Until Firefox 50, the src attribute is settable, but the change does not get handled properly. Starting in Firefox 50, existing track data is properly disposed of, new track data is loaded and put into effect, and so forth.
[3] Prior to Firefox 50, text tracks would only load if the <track> is in a document. Starting in Firefox 50, this incorrect requirement is lifted.
See also
- The HTML element implementing this interface:
<track>.