object-prototype-accessors-forced.js

'use strict';
var IS_PURE = require('../internals/is-pure');
var global = require('../internals/global');
var fails = require('../internals/fails');
var userAgent = require('../internals/engine-user-agent');

// 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
  var webkit = userAgent.match(/AppleWebKit\/(\d+)\./);
  if (webkit && +webkit[1] < 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];
});