tor-browser

The Tor Browser
git clone https://git.dasho.dev/tor-browser.git
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optional-expression.js (666B)

      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  optional chain on recursive optional expression
      7 info: |
      8  Left-Hand-Side Expressions
      9    OptionalExpression:
     10      OptionalExpression OptionalChain
     11 features: [optional-chaining]
     12 ---*/
     13 
     14 const obj = {
     15  a: {
     16    b: 22
     17  }
     18 };
     19 
     20 function fn () {
     21  return {};
     22 }
     23 
     24 // OptionalExpression (MemberExpression OptionalChain) OptionalChain
     25 assert.sameValue(22, obj?.a?.b);
     26 // OptionalExpression (CallExpression OptionalChain) OptionalChain
     27 assert.sameValue(undefined, fn()?.a?.b);
     28 
     29 reportCompare(0, 0);