typescript transpiler

The typescript transpiler convert your code to javascript using tsc and then it run it with node. This can be used to develop standalone typescript applications (which doesn't mean you should, but some times it's useful).

Considerations when using build solution

By using a .solution.toml file, you can pass custom arguments to tsc if you want. But if you are already using a tsconfig.json to pass the arguments to tsc, make sure you set arguments = "" in your .solution.toml file because the arguments will prevail over anything you set on the tsconfig.json file.

Other considerations

Defining output on .solution.toml is not normally necessary on interpreted languages to be able to use to use the compiler option Build solution, but typescript is special in that sense, because it requires to be transpiled. So it is necessary on this case: You can find a example here.