Should I Learn JavaScript Before Starting TypeScript?

TypeScript is useful, especially on larger team projects, but it can be frustrating when a library has incomplete or awkward type definitions. For a small first project, JavaScript may let you focus on learning the web fundamentals with less setup. For a serious long-term project, TypeScript is often worth the additional complexity.

TypeScript is essentially JavaScript with an additional type system, so learning either one will help you understand the other. Starting with JavaScript can be simpler because browsers run it directly—you can use a script tag or the browser’s developer console without setting up a compiler. Once you’re comfortable with the basics, adding TypeScript is usually straightforward.

If you already know the project will become fairly large, using TypeScript from the beginning can save you a later migration. Converting an established JavaScript codebase isn’t impossible, but it can be tedious. Just make sure you still learn the underlying JavaScript concepts instead of treating TypeScript as a completely separate language.

You can start with TypeScript if you prefer the extra structure. Its type checking catches many mistakes early and can encourage good habits, even for beginners. The tradeoff is that TypeScript doesn’t run directly in browsers, so you’ll need a development setup that compiles it into JavaScript.