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-x/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; } });