com.google.javascript.jscomp.js.es6.reflect.preventextensions.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/defines';
'require util/polyfill';
'require es6/reflect/reflect';
$jscomp.polyfill('Reflect.preventExtensions', function(orig) {
if (orig) return orig;
if (!($jscomp.ASSUME_ES5 || typeof Object.preventExtensions == 'function')) {
return function() { return false; };
}
/**
* Polyfill for Reflect.preventExtensions() method:
* https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Reflect/preventExtensions
*
* Same function as Object.preventExtensions (the spec says
* to throw if the input is not an object, but jscompiler will
* fail to typecheck, so there's no reason to distinguish here).
*
* @param {!Object} target
* @return {boolean}
*/
var polyfill = function(target) {
Object.preventExtensions(target);
return !Object.isExtensible(target);
};
return polyfill;
}, 'es6', 'es3');