FeaturePolicy: allowedFeatures() method
Experimental: This is an experimental technology
Check the Browser compatibility table carefully before using this in production.
The allowedFeatures()
method of
the FeaturePolicy
interface returns a list of directive names of all
features allowed by the Permissions Policy. This enables introspection of individual directives
of the Permissions Policy it is run on. As such, allowedFeatures()
method
returns a subset of directives returned by features()
.
Syntax
js
const allowed = FeaturePolicy.allowedFeatures()
Parameters
None.
Return value
An array of strings representing the Permissions Policy directive names that are allowed by the Permissions Policy this method is called on.
Example
The following example logs all the allowed directives for the current document. Please note that these features might be restricted by the Permissions API, if the user did not grant the corresponding permission yet.
js
// First, get the Permissions Policy object
const featurePolicy = document.featurePolicy;
// Then query feature for specific
const allowed = featurePolicy.allowedFeatures();
for (const directive of allowed) {
console.log(directive);
}
Specifications
No specification found
No specification data found for api.FeaturePolicy.allowedFeatures
.
Check for problems with this page or contribute a missing spec_url
to mdn/browser-compat-data. Also make sure the specification is included in w3c/browser-specs.
Browser compatibility
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