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How to see output on VS Code with Typescript?

I am doing some code challenges using Typescript in VS code. When I try to run the code and see the output, I get "Code Language is not supported or defined". The language mode is set to Typescript React (I also tried just Typescript). And the file has a .tsx ending. Finally, I also did compile the file and make a duplicate .js version. Is there something I am forgetting?

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