HTMLSourceElement: sizes property

Baseline Widely available

This feature is well established and works across many devices and browser versions. It’s been available across browsers since March 2017.

The sizes property of the HTMLSourceElement interface is a string representing a list of one or more sizes, representing sizes between breakpoints, to which the resource applies.

It reflects the sizes attribute of the <source> element.

Value

A string.

Examples

html
<source
  id="el"
  src="mediumVideo.mov"
  type="video/quicktime"
  sizes="((min-width: 50em) and (max-width: 60em)) 50em,
         ((min-width: 30em) and (max-width: 50em)) 30em" />
js
const el = document.getElementById("el");
console.log(el.sizes); // Output: "((min-width: 50em) and (max-width: 60em)) 50em, ((min-width: 30em) and (max-width: 50em)) 30em"
el.sizes =
  "((min-width: 50em) and (max-width: 60em)) 50em, ((min-width: 30em) and (max-width: 50em)) 30em"; // Updates the sizes value

Specifications

Specification
HTML
# dom-source-sizes

Browser compatibility

Report problems with this compatibility data on GitHub
desktopmobile
Chrome
Edge
Firefox
Opera
Safari
Chrome Android
Firefox for Android
Opera Android
Safari on iOS
Samsung Internet
WebView Android
WebView on iOS
sizes

Legend

Tip: you can click/tap on a cell for more information.

Full support
Full support
See implementation notes.

See also