Strict mode Passingnon-Strict mode Passing
Features:
- Symbol
// 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: > Returns count of present values inserted via iterable argument. info: | get Map.prototype.size 5. Let count be 0. 6. For each Record {[[key]], [[value]]} p that is an element of entries a. If p.[[key]] is not empty, set count to count+1. features: [Symbol] ---*/ var map = new Map([ [0, undefined], [undefined, undefined], [false, undefined], [NaN, undefined], [null, undefined], ['', undefined], [Symbol(), undefined], ]); assert.sameValue(map.size, 7, 'The value of `map.size` is `7`');