This shows which elements are self closing or different text content
<$[data1] id=x>test</$[data1]>if(document.getElementById('x').textContent !== 'test') {0x0D
log('$[data1]');0x0D
}<area id=x>test</area><base id=x>test</base><br id=x>test</br><embed id=x>test</embed><hr id=x>test</hr><img id=x>test</img><input id=x>test</input><link id=x>test</link><meta id=x>test</meta><param id=x>test</param><source id=x>test</source><table id=x>test</table><template id=x>test</template><track id=x>test</track><wbr id=x>test</wbr>