This is an experimental technology
Check the Browser compatibility table carefully before using this in production.
The HTTP Feature-Policy
header autoplay
directive controls whether the current document is allowed to autoplay media requested through the HTMLMediaElement
interface. When this policy is enabled and there were no user gestures, the Promise
returned by HTMLMediaElement.play()
will reject with a DOMException
. The autoplay
attribute on <audio>
and <video>
elements will be ignored.
For more details on autoplay and autoplay blocking, see the article Autoplay guide for media and Web Audio APIs.
Syntax
Feature-Policy: autoplay <allowlist>;
- <allowlist>
An allowlist is a list of origins that takes one or more of the following values, separated by spaces:
*
: The feature will be allowed in this document, and all nested browsing contexts (iframes) regardless of their origin.'self'
: The feature will be allowed in this document, and in all nested browsing contexts (iframes) in the same origin.'src'
: (In an iframe allow attribute only) The feature will be allowed in this iframe, as long as the document loaded into it comes from the same origin as the URL in the iframe's src attribute.'none'
: The feature is disabled in top-level and nested browsing contexts.- <origin(s)>: The feature is allowed for specific origins (for example, https://example.com). Origins should be separated by a space.
The values
*
(enable for all origins) or'none'
(disable for all origins) may only be used alone, while'self'
and'src'
may be used with one or more origins.Features are each defined to have a default allowlist, which is one of:
*
: The feature is allowed by default in top-level browsing contexts and all nested browsing contexts (iframes).'self'
: The feature is allowed by default in top-level browsing contexts and in nested browsing contexts (iframes) in the same origin. The feature is not allowed in cross-origin documents in nested browsing contexts.'none'
: The feature is disabled in top-level and nested browsing contexts.
Default policy
The default value in Google Chrome is 'self'
.
Specifications
Specification | Status | Comment |
---|---|---|
Feature Policy | Editor's Draft | Initial definition. |
Browser compatibility
Desktop | Mobile | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
autoplay | Chrome Full support 64 | Edge Full support 79 | Firefox
Full support
74
| IE No support No | Opera Full support 51 | Safari No support No | WebView Android Full support 64 | Chrome Android Full support 64 | Firefox Android
Full support
65
| Opera Android Full support 47 | Safari iOS No support No | Samsung Internet Android Full support 9.0 |
Legend
- Full support
- Full support
- No support
- No support
- Experimental. Expect behavior to change in the future.
- Experimental. Expect behavior to change in the future.
- User must explicitly enable this feature.
- User must explicitly enable this feature.