more details.

##  Default policy

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

##  Specifications

Specification  
---  
[ WebUSB API  
#  permissions-policy  ](https://wicg.github.io/webusb/#permissions-policy)  
  
##  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)

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  *[
                
                 Non-standard
                
               ]: Non-standard. Check cross-browser support before using.
  *[
                
                 Deprecated
                
               ]: Deprecated. Not for use in new websites.
  *[