Have you checked this comment? You shouldn’t need anything special to integrate Bootstrap with Phoenix 1.7. I’d say that it’s even easier now that we have the Esbuild CLI built-in.
I think if you just follow the instructions on the docs you’ll get it to work, they even have a Vite-specific section there now: Get started with Bootstrap · Bootstrap v5.3.
About the thread, I won’t be updating it because the focus here is on ViteJs. However, I’m almost sure if you search the forum you’ll find threads like this one that goes step by step on how to configure Bootstrap itself: Phoenix 1.7 Bootstrap CSS for Core Components.
Cheers!
