com.google.javascript.jscomp.js.util.finddescriptor.js Maven / Gradle / Ivy
/*
* Copyright 2016 The Closure Compiler Authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
'require es6/reflect/getownpropertydescriptor';
'require es6/reflect/getprototypeof';
/**
* Helper function to find a descriptor.
* @param {!Object} target
* @param {string} propertyKey
* @return {!ObjectPropertyDescriptor|undefined}
*/
$jscomp.findDescriptor = function(target, propertyKey) {
var /** ?Object */ obj = target;
while (obj) {
var property = Reflect.getOwnPropertyDescriptor(obj, propertyKey);
if (property) {
return property;
}
obj = Reflect.getPrototypeOf(obj);
}
return undefined;
};