tor-browser

The Tor Browser
git clone https://git.dasho.dev/tor-browser.git
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update-expression-postfix.js (553B)

      1 // |reftest| error:SyntaxError
      2 // Copyright 2019 Google, Inc.  All rights reserved.
      3 // This code is governed by the BSD license found in the LICENSE file.
      4 /*---
      5 esid: prod-OptionalExpression
      6 description: >
      7  optional chaining is forbidden in write contexts
      8 info: |
      9  UpdateExpression[Yield, Await]:
     10    LeftHandSideExpression++
     11    LeftHandSideExpression--
     12    ++UnaryExpression
     13    --UnaryExpression
     14 features: [optional-chaining]
     15 negative:
     16  phase: parse
     17  type: SyntaxError
     18 ---*/
     19 
     20 $DONOTEVALUATE();
     21 
     22 // LeftHandSideExpression ++
     23 const a = {};
     24 a?.b++;