npm install @damienmortini/damdom-gui
<script src="node_modules/@damienmortini/damdom-gui/index.js"></script>
<damdom-gui></damdom-gui>
<script type="module">
import Element from '@damienmortini/damdom-gui';
window.customElements.define('my-element-name', class extends Element { });
</script>
<my-element-name></my-element-name>