| <style> | |
| .display-when-first-child { display: none; } | |
| .display-when-first-child:first-child { display: block; } | |
| </style> | |
| <div class="display-when-first-child">FAIL</div> | |
| <script> | |
| var test = document.createElement('div'); | |
| document.body.insertBefore(test, document.body.firstChild); | |
| if (document.body.innerText.indexOf('FAIL') < 0) | |
| test.innerText = 'PASS'; | |
| if (window.testRunner) | |
| testRunner.dumpAsText(); | |
| </script> |