Is it possible to use Elixir with Phoenix (with or without Liveview) without ANY JavaScript though? If so, how to go about it?

Not sure I understand exactly what you mean, but yeah generally speaking. You really don't need JS beyond what any of the project generators give you for a tonne of use cases. A lot can be handled where you need by the LiveView.JS module. Phoenix without LiveView definitely doesn't need JS.

So, I could build an e-commerce website in Elixir using Phoenix, similarly to how I could do this in PHP?

Would something like:

  $ mix archive.install hex phx_new
  $ mix phx.new your_project_name --no-html --no-webpack

work? With all the JavaScript removed if it still creates any.[1]

[1] I think it does create a .js file at the very least but that is just a configuration file.

Yes, you can build fully server rendered web apps with Phoenix. You'd need HTML templates for that though, so you shouldn't use the --no-html option.

--no-webpack is deprecated as Phoenix uses esbuild now but see the docs: "--no-esbuild - do not include esbuild dependencies and assets. We do not recommend setting this option, unless for API only applications, as doing so requires you to manually add and track JavaScript dependencies"

If I intend to create an e-commerce website without any JavaScript, may I use "--no-esbuild" given that I do not want to add any JavaScript dependencies? I am trying to replace the e-commerce website I have built using PHP & HTML & CSS (without any JavaScript at all).

I was even considering "--no-assets" and add Tailwind (or whatever else) manually.

I hope a core developer of Phoenix could help me out here. :/

https://news.ycombinator.com/item?id=35928648