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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:

  • *: 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.
The default value is 'self'.

Specifications

Specification Status Comment
Feature Policy Editor's Draft Initial definition.

Browser compatibility

Update compatibility data on GitHub
DesktopMobile
ChromeEdgeFirefoxInternet ExplorerOperaSafariAndroid webviewChrome for AndroidEdge MobileFirefox for AndroidOpera for AndroidSafari on iOSSamsung Internet
Basic support
Experimental
Chrome Full support 64Edge No support NoFirefox Full support 65
Disabled
Full support 65
Disabled
Disabled From version 65: this feature is behind the dom.security.featurePolicy.header.enabled preference (needs to be set to true). To change preferences in Firefox, visit about:config.
IE No support NoOpera Full support 51Safari No support NoWebView Android Full support 64Chrome Android Full support 64Edge Mobile No support NoFirefox Android Full support 65
Disabled
Full support 65
Disabled
Disabled From version 65: this feature is behind the dom.security.featurePolicy.header.enabled preference (needs to be set to true). To change preferences in Firefox, visit about:config.
Opera Android Full support 51Safari iOS No support NoSamsung Internet Android No support No

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.

See also

Schlagwörter des Dokuments und Mitwirkende

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