mirror of https://github.com/tc39/test262.git
20 lines
724 B
JavaScript
20 lines
724 B
JavaScript
// Copyright (C) 2020 Alexey Shvayka. 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: sec-assignment-operators-runtime-semantics-evaluation
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description: >
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??= doesn't special-case [[IsHTMLDDA]] object; rval is not evaluated.
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info: |
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AssignmentExpression : LeftHandSideExpression ??= AssignmentExpression
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1. Let lref be the result of evaluating LeftHandSideExpression.
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2. Let lval be ? GetValue(lref).
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3. If lval is neither undefined nor null, return lval.
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features: [IsHTMLDDA, logical-assignment-operators]
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---*/
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var IsHTMLDDA = $262.IsHTMLDDA;
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var value = IsHTMLDDA;
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assert.sameValue(value ??= unresolved, IsHTMLDDA);
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assert.sameValue(value, IsHTMLDDA);
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