Feature-Policy: autoplay

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

DesktopMobile
ChromeEdgeFirefoxInternet ExplorerOperaSafariAndroid webviewChrome for AndroidFirefox for AndroidOpera for AndroidSafari on iOSSamsung Internet
autoplay
Experimental
Chrome Full support 64Edge Full support 79Firefox Full support 74
Full support 74
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 64Firefox 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 47Safari iOS No support NoSamsung 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.

See also