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19 lines
549 B
JavaScript
19 lines
549 B
JavaScript
// Copyright 2019 Google, Inc. 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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accessing optional value on undefined or null returns undefined.
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info: |
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If baseValue is undefined or null, then
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Return undefined.
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features: [optional-chaining]
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---*/
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const nul = null;
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const undf = undefined;
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assert.sameValue(undefined, nul?.a);
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assert.sameValue(undefined, undf?.b);
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assert.sameValue(undefined, null?.a);
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assert.sameValue(undefined, undefined?.b);
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