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- var $ = require('../internals/export');
- 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-isfrozen -- safe
- var $isFrozen = Object.isFrozen;
- var FAILS_ON_PRIMITIVES = fails(function () { $isFrozen(1); });
- // `Object.isFrozen` method
- // https://tc39.es/ecma262/#sec-object.isfrozen
- $({ target: 'Object', stat: true, forced: FAILS_ON_PRIMITIVES || ARRAY_BUFFER_NON_EXTENSIBLE }, {
- isFrozen: function isFrozen(it) {
- if (!isObject(it)) return true;
- if (ARRAY_BUFFER_NON_EXTENSIBLE && classof(it) == 'ArrayBuffer') return true;
- return $isFrozen ? $isFrozen(it) : false;
- }
- });
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