Add built-in support for TypeScript #368
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This relies on
esbuild
to strip out types during import. ESbuild was chosen for its sheer performance. The official tsc compiler is very slow in comparison. This means there is no built-in type checking yet.The plan is to have a non emitting tsc process running in parallel just for type checking.
This PR is mainly waiting on Unable to preserve dynamic imports withtransform
ortransformSync
API evanw/esbuild#1029