Will check it out, thanks!

Also, I just came across this, which I think solves my problem: Progressive Web Apps  |  web.dev

As there is a package for phoenix js, I found it easy to integrate phoenix w/ javascript.

I made some test w/ Electron + React and was quite satisfied by the result.

The package is at https://www.npmjs.com/package/phoenix

LiveView is trying to avoid js, so it would not be the best match… unless your electron application is just a web client.

But You can do better, because You could also have a state manager in the frontend (like Redux, or newly use reducer hook).

Having a state manager on the frontend allows You to transform any data received in whatever You want. For example, I use those data in the frontend w/ THREE.js

LiveView is a way to have the state manager on the backend. But it will mostly communicate in HTML.

Having a state manager both in the backend AND in the frontend looks like a good solution to me, because You can send data on the wire only (JSON)