“Unexpected token: punc ())” when building for production

Question

If I try to test-build my application with ng build --prod --aot I get the following, quite short, error message:

$ ng build --prod
                      


        

Answer 1

In my case it was a leftover comma at the end of a list of functions inside a custom .js file in \src directory.

The tip of by --source-map=true and also setting --build-optimizer=false in angular.json helped me a lot.