tor-browser

The Tor Browser
git clone https://git.dasho.dev/tor-browser.git
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runtime-semantics-evaluation.js (571B)

      1 // Copyright 2019 Google, Inc.  All rights reserved.
      2 // This code is governed by the BSD license found in the LICENSE file.
      3 /*---
      4 esid: prod-OptionalExpression
      5 description: >
      6  accessing optional value on undefined or null returns undefined.
      7 info: |
      8  If baseValue is undefined or null, then
      9    Return undefined.
     10 features: [optional-chaining]
     11 ---*/
     12 
     13 const nul = null;
     14 const undf = undefined;
     15 assert.sameValue(undefined, nul?.a);
     16 assert.sameValue(undefined, undf?.b);
     17 assert.sameValue(undefined, null?.a);
     18 assert.sameValue(undefined, undefined?.b);
     19 
     20 reportCompare(0, 0);