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1 // Copyright 2015 The Chromium Authors. All rights reserved. | 1 // Copyright 2015 The Chromium Authors. All rights reserved. |
2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 var button = document.querySelector('button'); | 5 var button = document.querySelector('button'); |
6 var collapse = document.querySelector('#collapse'); | 6 var collapse = document.querySelector('#collapse'); |
7 button.addEventListener('click', function() { | 7 button.addEventListener('click', function() { |
8 collapse.toggle(); | 8 collapse.toggle(); |
9 }); | 9 }); |
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