| <script src="../../resources/testharness.js"></script> | |
| <script src="../../resources/testharnessreport.js"></script> | |
| <style>style { display: none; }</style> | |
| <style>* { display: table; }</style> | |
| <body>Test passes if it does not crash. | |
| <div id="log"></div> | |
| </body> | |
| <script> | |
| setup({single_test: true}); | |
| document.designMode = "on"; | |
| range = document.createRange(); | |
| range.selectNodeContents(document.body); | |
| window.getSelection().addRange(range); | |
| document.execCommand("FormatBlock", false, "h1"); | |
| done(); | |
| </script> |