How to configure tsconfig.json to output files from multiple source folders to single flat outDir?

Question

I have multiple typescript projects (e.g. client and server), which share some common functionality (located in a common fold

Answer 1

I've solved this problem in my current project (which has the same setup) by putting a link to the common lib into both sources.

common/
  src/
    lib/
client/
  src/
    lib/ -> $PROJECT_PATH/common/src/lib/
server/
  src/
    lib/ -> $PROJECT_PATH/common/src/lib/

Compilation and bundling become transparent as the tools treat that directory as a local one.