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document.featurePolicy＝ ／[Edge]

＝[object]：[object FeaturePolicy]

allowedFeatures＝[function]：function allowedFeatures() { [native code] }

allowsFeature＝[function]：function allowsFeature() { [native code] }

features＝[function]：function features() { [native code] }

getAllowlistForFeature＝[function]：function getAllowlistForFeature() { [native code] }