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Compiling TypeScript with tsc
Prerequisites: Your first TypeScript program
tsc --init generates a tsconfig.json file, which controls how the
compiler behaves for an entire project instead of one file at a time.
tsc --init
tsc
With a tsconfig.json present, running tsc alone (no filename)
compiles every .ts file the config includes. tsc --watch
recompiles automatically every time you save.