Strict mode Passingnon-Strict mode Passing
Features:
- ∅
// Copyright (c) 2012 Ecma International. All rights reserved. // This code is governed by the BSD license found in the LICENSE file. /*--- esid: sec-array.prototype.indexof description: > Array.prototype.indexOf - deleting own property causes index property not to be visited on an Array ---*/ var arr = [1, 2]; Object.defineProperty(arr, "1", { get: function() { return "6.99"; }, configurable: true }); Object.defineProperty(arr, "0", { get: function() { delete arr[1]; return 0; }, configurable: true }); assert.sameValue(arr.indexOf("6.99"), -1, 'arr.indexOf("6.99")');