I recently got inertia-phoenix (an Inertia.js adapter for Phoenix) working with Svelte. Setting up the server-side rendering (SSR) with Svelte and esbuild was a little tricky so I made a repo with a detailed guide and example project so that I would remember all the steps for future projects.
https://github.com/tonydangblog/phoenix-inertia-svelte
Thought I’d share it here in case anyone else is trying to get the same setup going. 
In addition to setting up Phoenix with Inertia and Svelte, the guide also includes a section for setting up several other JS tooling you may want when using Svelte, such as TypeScript, Prettier, ESLint, etc.
I’m definitely not an expert with esbuild setups, so please lmk if you see any mistakes or possible improvements! 
