| // Copyright (C) 2016 the V8 project authors. All rights reserved. |
| // This code is governed by the BSD license found in the LICENSE file. |
| /*--- |
| es6id: 21.1.1 |
| description: Subclassing the String object |
| info: | |
| 21.1.1 The String Constructor |
| |
| ... |
| The String constructor is designed to be subclassable. It may be used as the |
| value of an extends clause of a class definition. Subclass constructors that |
| intend to inherit the specified String behaviour must include a super call to |
| the String constructor to create and initialize the subclass instance with a |
| [[StringData]] internal slot. |
| ---*/ |
| |
| class S extends String {} |
| |
| var s = new S(' test262 '); |
| |
| assert.sameValue(s.trim(), 'test262'); |
| |
