com.google.javascript.jscomp.js.es6.reflect.get.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 util/finddescriptor';
'require util/polyfill';
'require es6/reflect/reflect';
$jscomp.polyfill('Reflect.get', function(orig) {
if (orig) return orig;
/**
* Polyfill for Reflect.get() method:
* https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Reflect/get
*
* Applies the 'getprop' operator as a function.
*
* @param {!Object} target Target on which to get the property.
* @param {string} propertyKey Name of the property to get.
* @param {!Object=} opt_receiver An optional 'this' to use for a getter.
* @return {*} The value of the property.
* @suppress {reportUnknownTypes}
*/
var polyfill = function(target, propertyKey, opt_receiver) {
if (arguments.length <= 2) {
return target[propertyKey];
}
var property = $jscomp.findDescriptor(target, propertyKey);
if (property) {
return property.get ? property.get.call(opt_receiver) : property.value;
}
return undefined;
};
return polyfill;
}, 'es6', 'es5'); // ES5: findDescriptor requires getPrototypeOf