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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.

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/*
 * 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.
 */


/**
 * @fileoverview Specifies objects that the compiler does NOT polyfill.
 * NOTE: this file should never be injected, since all the implementations
 * are null.
 */

'require util/polyfill';

// Proxy is not really possible to polyfill, because pre-es6 JS doesn't provide
// all of the hooks necessary to build it.
$jscomp.polyfill('Proxy', null, 'es6', 'es6');

// Polyfilling this in infeasible, since it would require including a large
// table of unicode information in the polyfill.
$jscomp.polyfill('String.prototype.normalize', null, 'es6', 'es6');