<vaadin-select> is a Web Component similar to a native browser select element, part of the Vaadin components.
<vaadin-select></vaadin-select>
<script>
document.querySelector('vaadin-select').renderer = root => {
if (root.firstElementChild) {
return;
}
// Note that innerHTML is only used for demo purposes here!
// Prefer using a templating library instead.
root.innerHTML = `
<vaadin-list-box>
<vaadin-item>Option one</vaadin-item>
<vaadin-item>Option two</vaadin-item>
<vaadin-item>Option three</vaadin-item>
<hr>
<vaadin-item disabled>Option four</vaadin-item>
</vaadin-list-box>
`;
};
</script>