webpack --watch not refreshing your bundles when modifying the source files. In this case, webpack’s output after changing the file is similar to the following one:
As you can see, there are some
[cached] mentions there in a few places and no
[code generated] statements at all. The effect is that your bundles are not rebuilt at all. In order to have them refreshed, you need to restart the building process, which takes time and makes your development flow painful. If you want to know how to solve that problem, read on ?