Summary
At the start of this chapter, there was a section on why we would use TypeScript to build a frontend. We now have first-hand experience of TypeScript catching errors early and giving us productivity features such as IntelliSense. We learned that TypeScript is just an extension of JavaScript. So, we get to use all of the features in JavaScript plus additional stuff from TypeScript. One of these additional things is type annotations, which help the compiler spot errors and light up features such as code navigation in our code editor.
We haven't covered everything about types yet, but we have enough knowledge to build fairly complex TypeScript programs now. Classes, in particular, allow us to model complex real-world objects nicely. ...
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