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IsExtensible.js 510B

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  1. 'use strict';
  2. var GetIntrinsic = require('../GetIntrinsic');
  3. var $Object = GetIntrinsic('%Object%');
  4. var isPrimitive = require('../helpers/isPrimitive');
  5. var $preventExtensions = $Object.preventExtensions;
  6. var $isExtensible = $Object.isExtensible;
  7. // https://www.ecma-international.org/ecma-262/6.0/#sec-isextensible-o
  8. module.exports = $preventExtensions
  9. ? function IsExtensible(obj) {
  10. return !isPrimitive(obj) && $isExtensible(obj);
  11. }
  12. : function IsExtensible(obj) {
  13. return !isPrimitive(obj);
  14. };