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FeaturePolicy

Experimental: This is an experimental technology
Check the Browser compatibility table carefully before using this in production.

The FeaturePolicy interface represents the set of Permissions Policies applied to the current execution context.

FeaturePolicy.allowsFeature Experimental: Returns a Boolean that indicates whether or not a particular feature is enabled in the specified context.
FeaturePolicy.features Experimental: Returns a list of names of all features supported by the User Agent. Features whose names appear on the list might not be allowed by the Permissions Policy of the current execution context and/or might be restricted by user-granted permissions.
FeaturePolicy.allowedFeatures Experimental: Returns a list of names of all features supported by the User Agent and allowed by the Permissions Policy. Note that features appearing on this list might still be behind a user permission.
FeaturePolicy.getAllowlistForFeature Experimental: Returns the allow for the specified feature.

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