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39 lines
857 B
JavaScript
39 lines
857 B
JavaScript
// Copyright 2020 Salesforce.com, 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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Productions for ?. IdentifierName
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info: |
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OptionalChain[Yield, Await]:
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?. IdentifierName
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features: [optional-chaining]
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---*/
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const arr = [10, 11];
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const obj = {
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a: 'hello'
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};
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assert.sameValue(obj?.a, 'hello');
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assert.sameValue(obj?.\u0061, 'hello');
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assert.sameValue(obj?.\u{0061}, 'hello');
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assert.sameValue(obj?.\u0062, undefined);
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assert.sameValue(obj?.\u{0062}, undefined);
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assert.sameValue(arr ?. length, 2);
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assert.sameValue(arr ?. l\u0065ngth, 2);
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assert.sameValue(arr ?. l\u{0065}ngth, 2);
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assert.sameValue(obj?.$, undefined);
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obj.$ = 42;
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assert.sameValue(obj?.$, 42);
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assert.sameValue(obj?._, undefined);
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obj._ = 39;
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assert.sameValue(obj?._, 39);
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