In this chapter, we are going to build our first application together. It won't take over the world (yet), but it will certainly help you to become more familiar with TypeScript's basic features.
Building this first concrete application will give us the chance to look at many TypeScript concepts.
We'll also take the opportunity to learn about npm with its package.json configuration file, as well as tsc (the TypeScript compiler) and the tsconfig.json configuration file.
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