Using components without build tools?

Is it possible to use vaadin components without build tools? Perhaps directly from a URL with ES6 modules the same way we’re able to with amber .

Hello. We are working on converting Vaadin components to LitElement.
The future versions will work with as well as

Polymer based issues are affected by this nasty issue at the moment:

Note, you can still use Vaadin components with only bare module specifier transform (same as for ES modues in general).
We recommend es-dev-server:

Could we follow the progress somewhere?