'use strict'; var IS_PURE = require('../internals/is-pure'); var global = require('../internals/global'); var fails = require('../internals/fails'); var WEBKIT = require('../internals/engine-webkit-version'); // Forced replacement object prototype accessors methods module.exports = IS_PURE || !fails(function () { // This feature detection crashes old WebKit // https://github.com/zloirock/core-js/issues/232 if (WEBKIT && WEBKIT < 535) return; var key = Math.random(); // In FF throws only define methods // eslint-disable-next-line no-undef, no-useless-call -- required for testing __defineSetter__.call(null, key, function () { /* empty */ }); delete global[key]; });