HTML <video> data-* Attribute

HTML <var>

HTML <wbr>

A data-* attribute on a <video> tag attaches additional data to the video control.

To create a custom attribute, replace * with a lowercase string, such as data-id, data-status, or data-location.

Example

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A custom data-title attribute on a <video>.
The attribute value is not visible, but is readable by JavaScript.

<video data-title="Bucky Bunny" width="320" height="240" controls>
  <source src="/media/movie.mp4" type="video/mp4">
  <source src="/media/movie.ogg" type="video/ogg">
</video>

Using data-*

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The data-* attribute adds custom information to a <video> element.

The * part is replaced with a lowercase string, such as data-id, data-volume, data-breed, etc.

An <video> element can have any number of data-* attributes, each with their own name.

Using data-* attributes reduces the need for requests to the server.

Note: The data-* attribute is not visible and does not change the appearance of the video control.

Syntax

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<video data-*="value">

Note: The * can be any string, such as data-id, data-cost, data-supplier, etc.

Values

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Value	Description
value	A string value. Can be numeric, alphanumeric, JSON, etc.

More Examples

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A data-rating attribute on a <video> tag.
Clicking the button will display the rating for the video.

<video id="myvideo" data-rating="All audiences" width="320" height="240" controls>
  <source src="/media/movie.mp4" type="video/mp4">
  <source src="/media/movie.ogg" type="video/ogg">
</video>

<br/><br/>
<button onclick="show();">Show data</button>

<script>
  let show = () => {
     let element = document.getElementById("myvideo");
     alert("Rating = " + element.getAttribute('data-rating'));
  }
</script>

Code explanation

The <video> tag contains a custom data-rating attribute.

The data-rating value stores the title of the video file.

Button clicks are handled by the onclick event.

Onclick invokes a JavaScript function that extracts and displays the <video> rating.

Browser support

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Here is when data-* support started for each browser: