Strict mode Failing
Expected no error, got SyntaxError: warning: the variable "unresolved" was not declared in function "global"
Features:
- IsHTMLDDA
- logical-assignment-operators
Expected no error, got SyntaxError: warning: the variable "unresolved" was not declared in function "global"
// Copyright (C) 2020 Alexey Shvayka. All rights reserved. // This code is governed by the BSD license found in the LICENSE file. /*--- esid: sec-assignment-operators-runtime-semantics-evaluation description: > ??= doesn't special-case [[IsHTMLDDA]] object; rval is not evaluated. info: | AssignmentExpression : LeftHandSideExpression ??= AssignmentExpression 1. Let lref be the result of evaluating LeftHandSideExpression. 2. Let lval be ? GetValue(lref). 3. If lval is neither undefined nor null, return lval. features: [IsHTMLDDA, logical-assignment-operators] ---*/ var IsHTMLDDA = $262.IsHTMLDDA; var value = IsHTMLDDA; assert.sameValue(value ??= unresolved, IsHTMLDDA); assert.sameValue(value, IsHTMLDDA);