FeaturePolicy.getAllowlistForFeature()
Experimental: This is an experimental technology
Check the Browser compatibility table carefully before using this in production.
The getAllowlistForFeature()
method of the FeaturePolicy
allows query of the allow list for a
specific feature for the current Feature Policy.
Syntax
const allowlist = FeaturePolicy.getAllowlistForFeature(<feature>)
Parameter
Feature name
A specific feature name must be specified.
Return value
An Allow list for the specified feature.
Errors
The function will raise a warning if the specified Feature 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 Feature Policy. Please note that Camera API might be restricted by the Permissions API, if the user did not grant the corresponding permission yet.
// First, get the Feature Policy object
const featurePolicy = document.featurePolicy
// Then query feature for specific
const allowlist = featurePolicy.getAllowlistForFeature("camera")
for (const origin of allowlist) {
console.log(origin)
}
Specifications
No specification found
No specification data found for api.FeaturePolicy.getAllowlistForFeature
.
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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