le-api) . This stops execution
of freezable tasks such as JavaScript timers (e.g. [ ` setTimeout() ` ](/en-
US/docs/Web/API/setTimeout) ) and [ ` fetch() ` ](/en-US/docs/Web/API/fetch)
callbacks.

##  Syntax

http

    
    
    Permissions-Policy: execution-while-out-of-viewport=<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 ` execution-while-out-of-viewport ` is ` * ` .

##  Specifications

Specification  
---  
[ Page Lifecycle  
#  feature-policies  ](https://wicg.github.io/page-lifecycle/#feature-
policies)  
  
##  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?

Yes  No

[ 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-
US/docs/Web/HTTP/Headers/Permissions-Policy/execution-while-out-of-
viewport/contributors.txt) .

[ View this page on GitHub
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policy/execution-while-out-of-viewport \(Opens in a new tab\)") â¢  [ Report
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of-
viewport&metadata=%3C%21--+Do+not+make+changes+below+this+line+--%3E%0A%3Cdetails%3E%0A%3Csummary%3EPage+report+details%3C%2Fsummary%3E%0A%0A*+Folder%3A+%60en-
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US%2Fdocs%2FWeb%2FHTTP%2FHeaders%2FPermissions-Policy%2Fexecution-while-out-
of-
viewport%0A*+GitHub+URL%3A+https%3A%2F%2Fgithub.com%2Fmdn%2Fcontent%2Fblob%2Fmain%2Ffiles%2Fen-
us%2Fweb%2Fhttp%2Fheaders%2Fpermissions-policy%2Fexecution-while-out-of-
viewport%2Findex.md%0A*+Last+commit%3A+https%3A%2F%2Fgithub.com%2Fmdn%2Fcontent%2Fcommit%2F0880a90f3811475d78bc4b2c344eb4146f25f66c%0A*+Document+last+modified%3A+2023-04-10T19%3A47%3A15.000Z%0A%0A%3C%2Fdetails%3E
"This will take you to GitHub to file a new issue.")

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