2 <style>#el0::first-letter, #el0:first-child { height:
100px;}
</style>
3 This test passes if it doesn't crash.
5 <div id='container' contentEditable
><a><img><div id=
"el0" style=
"display: inline-flex"><pre>AAAAA
</pre></div></a></div>
8 testRunner
.dumpAsText();
10 window
.getSelection().selectAllChildren(document
.getElementById('container'));
11 document
.execCommand('FormatBlock', false, '<h5>');