com.google.javascript.jscomp.js.es6.reflect.set.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/isextensible';
'require util/finddescriptor';
'require util/polyfill';
$jscomp.polyfill('Reflect.set', function(orig) {
if (orig) return orig;
/**
* Polyfill for Reflect.set() method:
* https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Reflect/set
*
* Applies the 'setprop' operator as a function.
*
* @param {!Object} target Target on which to get the property.
* @param {string} propertyKey Name of the property to get.
* @param {*} value Value to set.
* @param {!Object=} opt_receiver An optional 'this' to use for a setter.
* @return {boolean} Whether setting was successful.
*/
var polyfill = function(target, propertyKey, value, opt_receiver) {
var property = $jscomp.findDescriptor(target, propertyKey);
if (!property) {
if (Reflect.isExtensible(target)) {
target[propertyKey] = value;
return true;
}
return false;
}
if (property.set) {
property.set.call(arguments.length > 3 ? opt_receiver : target, value);
return true;
} else if (property.writable && !Object.isFrozen(target)) {
target[propertyKey] = value;
return true;
}
return false;
};
return polyfill;
}, 'es6', 'es5'); // ES5: findDescriptor requires getPrototypeOf