com.google.javascript.jscomp.js.es6.util.assign.js Maven / Gradle / Ivy
/*
* Copyright 2018 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.
*/
/**
* @fileoverview
* @suppress {uselessCode}
*/
'require util/owns';
'require util/polyfill';
'require util/shouldpolyfill';
/**
* Equivalent to the Object.assign() method, but guaranteed to be available for use in code
* generated by the compiler.
*
* https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/assign
*
* Copies values of all enumerable own properties from one or more
* sources to the given target object, and returns the target.
*
* @final
* @param {!Object} target The target object onto which to copy.
* @param {...?Object} var_args The source objects.
* @return {!Object} The target object is returned.
*/
$jscomp.assign =
($jscomp.TRUST_ES6_POLYFILLS && typeof Object.assign == 'function') ?
Object.assign :
/**
* @param {!Object} target
* @param {...?Object} var_args
* @return {!Object}
* @suppress {reportUnknownTypes}
*/
function(target, var_args) {
for (var i = 1; i < arguments.length; i++) {
var source = arguments[i];
if (!source) continue;
for (var key in source) {
if ($jscomp.owns(source, key)) target[key] = source[key];
}
}
return target;
};