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-x/no-object-isextensible -- safe
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var $isExtensible = Object.isExtensible;
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var FAILS_ON_PRIMITIVES = fails(function () { $isExtensible(1); });
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// `Object.isExtensible` method
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// https://tc39.es/ecma262/#sec-object.isextensible
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module.exports = (FAILS_ON_PRIMITIVES || ARRAY_BUFFER_NON_EXTENSIBLE) ? function isExtensible(it) {
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if (!isObject(it)) return false;
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if (ARRAY_BUFFER_NON_EXTENSIBLE && classof(it) == 'ArrayBuffer') return false;
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return $isExtensible ? $isExtensible(it) : true;
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} : $isExtensible;
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