One thing that I really like about TypeScript is the ability to gradually adopt the typing system that it offers. So long as you're using the .ts (or .tsx) extension on your files, your JS and TS can co-exist in the same project and things just work.
Now we need to define the TypeScript compiler options we expect our project to follow. This can either be done manually, or you can use tsc - the TypeScript compiler - to initialise a set of sensible defaults for you. Imagine which option we will choose?
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