mirror of https://github.com/tc39/test262.git
23 lines
700 B
JavaScript
23 lines
700 B
JavaScript
// 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');
|
|
|