| // Copyright 2019 Google, Inc. All rights reserved. | |
| // This code is governed by the BSD license found in the LICENSE file. | |
| /*--- | |
| esid: prod-OptionalExpression | |
| description: > | |
| optional chain bracket notation containing optional expresion | |
| info: | | |
| OptionalChain: | |
| ?. [OptionalExpression] | |
| features: [optional-chaining] | |
| ---*/ | |
| const a = undefined; | |
| const b = {e: 0}; | |
| const c = {}; | |
| c[undefined] = 11; | |
| const d = [22]; | |
| assert.sameValue(undefined, a?.[a?.b]); | |
| assert.sameValue(11, c?.[a?.b]); | |
| assert.sameValue(22, d?.[b?.e]); |