ence/Global_Objects/Promise) returned by [ `
HTMLMediaElement.play() ` ](/en-US/docs/Web/API/HTMLMediaElement/play) will
reject with a [ ` DOMException ` ](/en-US/docs/Web/API/DOMException) . The [ `
autoplay ` ](/en-US/docs/Web/HTML/Element/audio#autoplay) attribute on [ `
<audio> ` ](/en-US/docs/Web/HTML/Element/audio) and [ ` <video> ` ](/en-
US/docs/Web/HTML/Element/video) elements will be ignored.

**Note:** For more details on autoplay and autoplay blocking, see the article
[ Autoplay guide for media and Web Audio APIs ](/en-
US/docs/Web/Media/Autoplay_guide) .

##  Syntax

http

    
    
    Permissions-Policy: autoplay=<allowlist>;
    

` <allowlist> `

    

A list of origins for which permission is granted to use the feature. See [ `
Permissions-Policy ` > Syntax ](/en-US/docs/Web/HTTP/Headers/Permissions-
Policy#syntax) for more details.

##  Default policy

The default allowlist for ` autoplay ` is ` self ` .

##  Specifications

Specification  
---  
[ HTML Standard  
#  autoplay-feature
](https://html.spec.whatwg.org/multipage/infrastructure.html#autoplay-feature)  
  
##  Browser compatibility

BCD tables only load in the browser  with JavaScript enabled. Enable
JavaScript to view data.

##  See also

  * [ ` Permissions-Policy ` ](/en-US/docs/Web/HTTP/Headers/Permissions-Policy) header 
  * [ Permissions Policy ](/en-US/docs/Web/HTTP/Permissions_Policy)

##  Help improve MDN

Was this page helpful to you?

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[ Learn how to contribute
](https://github.com/mdn/content/blob/main/CONTRIBUTING.md "This will take you
to our contribution guidelines on GitHub.") .

This page was last modified on  Apr 10, 2023  by  [ MDN contributors ](/en-
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