HTML <track> tag provides a simple, standardized way to add captions, subtitles, screen reader descriptions and chapters to Video and Audio objects.
The track element is generally used to specify external timed text tracks for media elements.
HTML track Tag Sample Code
<video src="video_sample.ogv" width="100%" height="250" controls>
<track kind="subtitles" label="Represent english subtitles" src="video_sample.vtt"
srclang="en" default></track>
<p>Sorry, your web browser doesn't support this tag or video.</p>
</video>
HTML track Tag Sample Result
Note: The track tag is not likely supported by all web browsers. To view result, use “Google Chrome” and see the text on the video changes during track play.
Tag Specific Attributes Support
Following are the tag specific attributes that are supported by <track> tag.
| Attribute | Value | Description |
|---|---|---|
| default | default | Represents the enabled track evenif the user do not indicate that another track will more familiar to it |
| kind | chapters captions descriptions metadata subtitles etc. |
Represents the kind of track text that is used to display on video for multimedia object |
| label | label_text | Represents the title for the track text |
| src | url | Represents the source location for files for the track |
| srclang | lang_code | Represents the language code for the track text for example use srclang=”en” for English, srclang=”it” for Italian etc. It is required whenever you are using kind=”subtitles” |
Standard Attributes Support
HTML <track> tag supports mostly all HTML Attributes. Following are some most common attributes that are used by <track> tag. You can get more details about available HTML Attributes here.
| Attribute | Value | Description |
|---|---|---|
| class | user_defined | Represents a style for an element which is used in CSS style sheet |
| id | user_defined | Represents unique id for an element |
| style | css_properties | Represents an inline style for an element for e.g style=”color:red;text-decoration:underline;” |
| title | user_defined | Represents a tooltip information for an elements like img, a, abbr etc |
Event Attributes Support
The “script” is invoked when a certain “event” occurs. Each event handler content attribute deals with a different event. HTML <track> tag supports mostly all HTML Event Attributes. Following are some most common event attributes that are used by <track> tag. You can get more details about available HTML Event Attributes here.
| Attribute | Value | Description |
|---|---|---|
| onclick | script | Event Fires immediately when mouse click on the specified element |
| ondblclick | script | Event Fires immediately when mouse double-click on the specified element |
| onkeydown | script | Event Fires immediately when user is pressing a down key from keyboard |
| onkeypress | script | Event Fires immediately when user presses a key from keyboard |
| onkeyup | script | Event Fires immediately when user releases a key from keyboard |
| onmousedown | script | Event Fires immediately when mouse pointer gets down from an element |
| onmousemove | script | Event Fires immediately when mouse pointer moves over an element |
| onmouseout | script | Event Fires immediately when mouse pointer gets out from an element |
| onmouseover | script | Event Fires immediately when mouse pointer moves over an element |
| onmouseup | script | Event Fires immediately when a mouse pointer is released over an element |
