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- 'use strict';
- var fails = require('../internals/fails');
- var isObject = require('../internals/is-object');
- var classof = require('../internals/classof-raw');
- var ARRAY_BUFFER_NON_EXTENSIBLE = require('../internals/array-buffer-non-extensible');
-
- // eslint-disable-next-line es/no-object-isextensible -- safe
- var $isExtensible = Object.isExtensible;
- var FAILS_ON_PRIMITIVES = fails(function () { $isExtensible(1); });
-
- // `Object.isExtensible` method
- // https://tc39.es/ecma262/#sec-object.isextensible
- module.exports = (FAILS_ON_PRIMITIVES || ARRAY_BUFFER_NON_EXTENSIBLE) ? function isExtensible(it) {
- if (!isObject(it)) return false;
- if (ARRAY_BUFFER_NON_EXTENSIBLE && classof(it) === 'ArrayBuffer') return false;
- return $isExtensible ? $isExtensible(it) : true;
- } : $isExtensible;
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