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Closure Compiler is a JavaScript optimizing compiler. It parses your
JavaScript, analyzes it, removes dead code and rewrites and minimizes
what's left. It also checks syntax, variable references, and types, and
warns about common JavaScript pitfalls. It is used in many of Google's
JavaScript apps, including Gmail, Google Web Search, Google Maps, and
Google Docs.
/*
* 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/apply';
'require util/polyfill';
$jscomp.polyfill('Reflect.construct', function(orig) {
if (orig) return orig;
/**
* Polyfill for Reflect.construct() method:
* https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Reflect/construct
*
* Calls a constructor as with the 'new' operator.
* TODO(sdh): how to type 'target' with (new: TARGET) if opt_newTarget missing?
*
* @param {function(new: ?, ...?)} target The constructor to call.
* @param {!Array} argList The arguments as a list.
* @param {function(new: TARGET, ...?)=} opt_newTarget The constructor to instantiate.
* @return {TARGET} The result of the function call.
* @template TARGET
*/
var polyfill = function(target, argList, opt_newTarget) {
// if (arguments.length < 3 || opt_newTarget == target) {
// return new target(...argList);
// }
if (opt_newTarget === undefined) opt_newTarget = target;
var proto = opt_newTarget.prototype || Object.prototype;
var obj = Object.create(proto);
var out = Reflect.apply(target, obj, argList);
return out || obj;
};
return polyfill;
}, 'es6', 'es5'); // ES5: Requires Object.create