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20 lines
528 B
JavaScript
20 lines
528 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 ?. Arguments
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info: |
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OptionalChain[Yield, Await]:
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?. Arguments
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features: [optional-chaining]
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---*/
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function fn(arg1, arg2, arg3 = 0) {
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return arg1 + arg2 + arg3;
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}
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assert.sameValue(fn?.(10, 20), 30, 'regular');
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assert.sameValue(String?.(42), '42', 'built-in');
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assert.sameValue(fn ?. (...[10, 20, 40]), 70, 'spread');
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