<!DOCTYPE html>
<style>
details {
  background-color: blue;
  width: 100px;
  height: 100px;
}
</style>
<html>
<details id=o1><div></div></details>
<script>
window.onload = function(){
  o1.animate([{'transform': 'none'}], 100);
};
</script>
</html>
