elect1>

<x-select-class1>
  <div></div>
</x-select-class1>

<x-select-attr>
  <x-attr></x-attr>
</x-select-attr>

<x-compose-select-attr></x-compose-select-attr>

<x-redistribute-a-b></x-redistribute-a-b>

<div id="container">
  <x-echo></x-echo>
  <span>1</span>
  <span>2</span>
</div>

<x-deep-contains></x-deep-contains>

<x-wrapped></x-wrapped>

<x-shadow-host-root>
  <x-shadow-host-root-light></x-shadow-host-root-light>
</x-shadow-host-root>

<x-outer>
  <button>click me</button>
</x-outer>
<script>
  