If you wrote a browser client in Javascript / Typescript, then it makes sense to write a backend in it as well since it's easy to share code and data between th

If you wrote a browser client in Javascript / Typescript, then it makes sense to write a backend in it as well since it's easy to share code and data between them. Now you can also write CLI tools that are trivial to deploy and can also share code with everything else. This is the same motivation behind other languages that do the reverse; compile to JS / WASM.