If you’ve been putting off learning TypeScript because your JavaScript already works fine, I get it. Adding a compilation step and annotating types on everything feels like friction you don’t need. But after building full-stack applications with it, the tradeoff is clearly worth it — especially once your codebase grows past a few files.
The real benefit isn’t catching typos. It’s that TypeScript forces you to think explicitly about the shape of your data. When you define an interface for an API response, you’re documenting your own code as you write it. Refactoring becomes dramatically less terrifying because the compiler tells you everywhere something breaks before you even run the app. If you’re starting a new project, there’s almost no reason not to use it — the setup cost is minimal and the long-term payoff is significant.