In that article, I talked about how angular compiles the code in the latest version(v9) but think about it, not all code is compiled at the same time there are libraries, npm modules, there dependencies are precompiled and these may no work well with the way ngtsc compiles Angular code. This may cause failures at runtime, compile-time, etc. Fortunately, the Angular has already solved these problems for us using the Angular compatibility compiler ngcc.

#angular #compilers #angular9 #angular-internals