Feature-Policy: sync-xhr
Experimental: This is an experimental technology
Check the Browser compatibility table carefully before using this in production.
The HTTP Feature-Policy header sync-xhr directive controls whether the current document is allowed to make synchronous XMLHttpRequest requests.
Syntax
Feature-Policy: sync-xhr <allowlist>;
- <allowlist>
-
A list of origins for which the feature is allowed. See
Feature-Policy.
Default policy
By default the policy is set to *, which means synchronous requests are allowed in all frames.
Browser compatibility
BCD tables only load in the browser