tor-browser

The Tor Browser
git clone https://git.dasho.dev/tor-browser.git
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regular-subclassing.js (722B)

      1 // Copyright (C) 2016 the V8 project authors. All rights reserved.
      2 // This code is governed by the BSD license found in the LICENSE file.
      3 /*---
      4 es6id: 21.1.1
      5 description: Subclassing the String object
      6 info: |
      7  21.1.1 The String Constructor
      8 
      9  ...
     10  The String constructor is designed to be subclassable. It may be used as the
     11  value of an extends clause of a class definition. Subclass constructors that
     12  intend to inherit the specified String behaviour must include a super call to
     13  the String constructor to create and initialize the subclass instance with a
     14  [[StringData]] internal slot.
     15 ---*/
     16 
     17 class S extends String {}
     18 
     19 var s = new S(' test262 ');
     20 
     21 assert.sameValue(s.trim(), 'test262');
     22 
     23 
     24 reportCompare(0, 0);