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-map.prototype.has description: > -0 and +0 are normalized to +0; info: | Map.prototype.has ( key ) 5. Repeat for each Record {[[key]], [[value]]} p that is an element of entries, a. If p.[[key]] is not empty and SameValueZero(p.[[key]], key) is true, return true. ... ---*/ var map = new Map(); assert.sameValue(map.has(-0), false); assert.sameValue(map.has(+0), false); map.set(-0, 42); assert.sameValue(map.has(-0), true); assert.sameValue(map.has(+0), true); map.clear(); map.set(+0, 42); assert.sameValue(map.has(-0), true); assert.sameValue(map.has(+0), true);