初始化

康凯

2022-05-20 aa4c235a8ca67ea8b731f90c951a465e92c0a865

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var $ = require('../internals/export');
var getBuiltIn = require('../internals/get-built-in');
var anObject = require('../internals/an-object');
var FREEZING = require('../internals/freezing');
 
// `Reflect.preventExtensions` method
// https://tc39.github.io/ecma262/#sec-reflect.preventextensions
$({ target: 'Reflect', stat: true, sham: !FREEZING }, {
  preventExtensions: function preventExtensions(target) {
    anObject(target);
    try {
      var objectPreventExtensions = getBuiltIn('Object', 'preventExtensions');
      if (objectPreventExtensions) objectPreventExtensions(target);
      return true;
    } catch (error) {
      return false;
    }
  }
});