> What if you're not building a browser app. For a server side, NodeJS app? Sure, you can add a build step on the back end, but that's not free, as it comes wit

> What if you're not building a browser app. For a server side, NodeJS app? Sure, you can add a build step on the back end, but that's not free, as it comes with setup, having to run a transpiler before your code. It is free if your IDE uses the TypeScript language server and gives you errors integrated with your code editor. You don't have to transpile if you don't want to. You can, as you said, just use esbuild to strip away the type information. > For typescript, you really need the official library which is slow and bloated. See above. You absolutely don't. And it's not slow or bloated at all. It has incremental builds, which are essentially instantaneous after the initial build.