Strict mode Passingnon-Strict mode Passing
Features:
- ∅
// Copyright (C) 2017 Leo Balter. All rights reserved. // This code is governed by the BSD license found in the LICENSE file. /*--- esid: sec-array.prototype.concat description: > "concat" property of Array.prototype info: | 17 ECMAScript Standard Built-in Objects Every other data property described in clauses 18 through 26 and in Annex B.2 has the attributes { [[Writable]]: true, [[Enumerable]]: false, [[Configurable]]: true } unless otherwise specified. includes: [propertyHelper.js] ---*/ assert.sameValue(typeof Array.prototype.concat, 'function', 'The value of `typeof Array.prototype.concat` is expected to be "function"'); verifyProperty(Array.prototype, "concat", { writable: true, enumerable: false, configurable: true });