1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
|
// Copyright 2019 Google, Inc. All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.
/*---
esid: prod-OptionalExpression
description: >
accessing optional value on undefined or null returns undefined.
info: |
If baseValue is undefined or null, then
Return undefined.
features: [optional-chaining]
---*/
const nul = null;
const undf = undefined;
assert.sameValue(undefined, nul?.a);
assert.sameValue(undefined, undf?.b);
assert.sameValue(undefined, null?.a);
assert.sameValue(undefined, undefined?.b);
|
