Summary

This has been a fast-paced introduction to what TypeScript is, and what it can do for JavaScript development. We started by setting up a simple development environment, got the TypeScript compiler installed, and started to use it to generate JavaScript. We then took a look at the basics of the type system, and explored how types can elevate the development experience. Finally, we used a third-party JavaScript library with the help of the declaration files.

In the next chapter, we will take a closer look at the type syntax in a lot more detail, get to understand where and how to use the available types, and how the type syntax can be used in different ways when writing functions.