Strict mode Passingnon-Strict mode Passing
Features:
- ∅
// Copyright (C) 2015 the V8 project authors. All rights reserved. // This code is governed by the BSD license found in the LICENSE file. /*--- esid: sec-get-map.prototype.size description: > Throws a TypeError if `this` object does not have a [[MapData]] internal slot. info: | get Map.prototype.size 1. Let M be the this value. 2. If Type(M) is not Object, throw a TypeError exception. 3. If M does not have a [[MapData]] internal slot, throw a TypeError exception. ... ---*/ var descriptor = Object.getOwnPropertyDescriptor(Map.prototype, 'size'); var map = new Map(); // Does not throw descriptor.get.call(map); assert.throws(TypeError, function() { descriptor.get.call([]); });