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23 lines
494 B
JavaScript
23 lines
494 B
JavaScript
// Copyright 2019 Google, LLC. All rights reserved.
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// This code is governed by the BSD license found in the LICENSE file.
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/*---
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esid: prod-OptionalExpression
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description: >
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optional chain in test portion of do while statement
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info: |
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IterationStatement
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for (LeftHandSideExpression in Expression) Statement
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features: [optional-chaining]
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---*/
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const obj = {
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inner: {
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a: 1,
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b: 2
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}
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};
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let str = '';
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for (const key in obj?.inner) {
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str += key;
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}
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assert.sameValue('ab', str);
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