## HTML Audio/Video DOM addTextTrack() Method
The `addTextTrack()` method is a built-in HTML5 DOM method used to programmatically create and return a new `TextTrack` object. This new track is automatically appended to the media element's list of text tracks (such as subtitles, captions, or descriptions).
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## Definition and Usage
The `addTextTrack()` method allows developers to dynamically add text tracks to an `
` or `` element directly via JavaScript, without needing to declare a `` element in the static HTML markup.
Once the `TextTrack` object is created, you can dynamically add cues (using `addCue()`) to display text at specific timestamps during media playback.
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## Syntax
```javascript
mediaElement.addTextTrack(kind, label, language)
```
### Parameter Values
| Parameter | Type | Description |
| :--- | :--- | :--- |
| `kind` | String | **Required.** Specifies the type of text track. Allowed values include:`"subtitles"`: Transcription or translation of the dialogue, suitable for when the sound is available but not understood. `"captions"`: Transcription or translation of dialogue, sound effects, and other relevant audio information, suitable for when the sound is unavailable or muted. `"descriptions"`: Textual descriptions of the video's visual actions, suitable for audio description. `"chapters"`: Chapter titles, intended to help the user navigate the media resource. `"metadata"`: Track intended for use by scripts. Not visible to the user. 
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