tor-browser

The Tor Browser
git clone https://git.dasho.dev/tor-browser.git
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emulates-undefined-and.js (912B)

      1 // Copyright (C) 2020 Alexey Shvayka. All rights reserved.
      2 // This code is governed by the BSD license found in the LICENSE file.
      3 /*---
      4 esid: sec-assignment-operators-runtime-semantics-evaluation
      5 description: >
      6  ToBoolean returns `false` for [[IsHTMLDDA]] object; rval is not evaluated.
      7 info: |
      8  AssignmentExpression : LeftHandSideExpression &&= AssignmentExpression
      9 
     10  1. Let lref be the result of evaluating LeftHandSideExpression.
     11  2. Let lval be ? GetValue(lref).
     12  3. Let lbool be ! ToBoolean(lval).
     13  4. If lbool is false, return lval.
     14 
     15  The [[IsHTMLDDA]] Internal Slot / Changes to ToBoolean
     16 
     17  1. If argument has an [[IsHTMLDDA]] internal slot, return false.
     18  2. Return true.
     19 features: [IsHTMLDDA, logical-assignment-operators]
     20 ---*/
     21 
     22 var IsHTMLDDA = $262.IsHTMLDDA;
     23 var value = IsHTMLDDA;
     24 assert.sameValue(value &&= unresolved, IsHTMLDDA);
     25 assert.sameValue(value, IsHTMLDDA);
     26 
     27 reportCompare(0, 0);