Phoenix UI is NO LONGER a component library. It is now a collection of re-usable components that you can copy and paste into your apps.

What do you mean by not a component library?

I mean you no longer install it as a dependency. It is not available or distributed via hex.pm.

From here on out, pick the components you need. Copy and paste the code into your project and customize to your needs. The code is yours.

Use this as a reference to build your own component libraries.