I would like to do the same, as I could in the good old `tsc` times: simply calling a `tsc -w`, and in the case of a changed file, it will be on the fly recompilated.

Unfortunately, `ngc` doesn't even seem to react anything to the `-w` flag, and even its possible command line arguments are completely undocumented.

But, `ng build` *has* a `--watch` flag, while it can create also AOT builds. Thus, probably a watch-mode `ngc` is possible.

But how?