Definition
The HTML Permission Elements defines InPagePermissionMixin
interface mixin InPagePermissionMixin {
readonly attribute boolean isValid;
readonly attribute InPagePermissionMixinBlockerReason invalidReason;
readonly attribute PermissionState initialPermissionStatus;
readonly attribute PermissionState permissionStatus;
attribute EventHandler onpromptaction;
attribute EventHandler onpromptdismiss;
attribute EventHandler onvalidationstatuschange;
};