HTMLMediaElement: preload property - Web APIs | MDN

Value

A string. Possible values are as follows:

none

Indicates that the media should not be preloaded.

metadata

Indicates that only media metadata (e.g., length) is fetched.

auto

Indicates that the whole media file can be downloaded, even if the user is not expected to use it.

empty string

A synonym of the auto value.

Examples

html

<video
  id="el"
  controls
  src="https://example.com/media.mp4"
  poster="https://example.com/media.jpg"
  width="800"
  height="600"
  preload="metadata">
  Sorry, your browser doesn't support embedded videos, but don't worry, you can
  <a href="https://example.com/media.mp4" download="media.mp4">download it</a>
  and watch it with your favorite video player!
</video>

js

const el = document.getElementById("el");
console.log(el.preload); // Output: "metadata"

Specifications

Specification
HTML
# dom-media-preload

Browser compatibility

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