99% of my projects are in NodeJS as web apps, so Javascript is king, my coding agents are in Node too, plain, boring, beautiful javascript, not typescript. Yesterday I needed a Rust project and my agents delivered so no need to change from JS
Yes. Vanilla JS is the best. You don't need TypeScript, Claude never makes type errors. TS just costs additional tokens and fills up the context window with useless type information; the wasted space could have been used to provide additional code/logical context.
