// 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: > ToBoolean returns `false` for [[IsHTMLDDA]] object; rval is evaluated. info: | AssignmentExpression : LeftHandSideExpression ||= AssignmentExpression 1. Let lref be the result of evaluating LeftHandSideExpression. 2. Let lval be ? GetValue(lref). 3. Let lbool be ! ToBoolean(lval). [...] 7. Perform ? PutValue(lref, rval). 8. Return rval. The [[IsHTMLDDA]] Internal Slot / Changes to ToBoolean 1. If argument has an [[IsHTMLDDA]] internal slot, return false. 2. Return true. features: [IsHTMLDDA, logical-assignment-operators] ---*/ var value = $262.IsHTMLDDA; assert.sameValue(value ||= 2, 2); assert.sameValue(value, 2);