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20 lines
810 B
20 lines
810 B
3 years ago
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var $ = require('../internals/export');
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var fails = require('../internals/fails');
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var isObject = require('../internals/is-object');
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var classof = require('../internals/classof-raw');
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var ARRAY_BUFFER_NON_EXTENSIBLE = require('../internals/array-buffer-non-extensible');
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// eslint-disable-next-line es/no-object-isfrozen -- safe
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var $isFrozen = Object.isFrozen;
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var FAILS_ON_PRIMITIVES = fails(function () { $isFrozen(1); });
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// `Object.isFrozen` method
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// https://tc39.es/ecma262/#sec-object.isfrozen
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$({ target: 'Object', stat: true, forced: FAILS_ON_PRIMITIVES || ARRAY_BUFFER_NON_EXTENSIBLE }, {
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isFrozen: function isFrozen(it) {
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if (!isObject(it)) return true;
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if (ARRAY_BUFFER_NON_EXTENSIBLE && classof(it) == 'ArrayBuffer') return true;
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return $isFrozen ? $isFrozen(it) : false;
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}
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});
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