FeaturePolicy: getAllowlistForFeature() method
Experimental: This is an experimental technology
Check the Browser compatibility table carefully before using this in production.
The getAllowlistForFeature()
method of the FeaturePolicy interface enables querying of the allowlist for a specific feature for the current Permissions Policy.
Syntax
getAllowlistForFeature(feature)
Parameters
feature-
The specific feature name to get its allowlist.
Return value
An array of strings containing the serialized list of allowed origins for the feature. If a wildcard (*) is used, the array will contain *.
Exceptions
The function will raise a warning if the specified Permissions Policy directive name is not known. However, it will also return empty array, indicating that no origin is allowed to use the feature.
Example
The following example prints all the origins that are allowed to use Camera API by the Permissions Policy. Please note that Camera API might also be restricted by the Permissions API, if the user did not grant the corresponding permission.
// First, get the FeaturePolicy object
const featurePolicy = document.featurePolicy;
// Query for specific feature
const allowlist = featurePolicy.getAllowlistForFeature("camera");
for (const origin of allowlist) {
console.log(origin);
}
Specifications
This feature does not appear to be defined in any specification.Browser compatibility
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Legend
Tip: you can click/tap on a cell for more information.
- Full support
- Full support
- No support
- No support
- Experimental. Expect behavior to change in the future.
- User must explicitly enable this feature.