Webpack has a nifty feature called Hot Module Replacement [HMR] that helps replace old modules with the newer ones without reloading the browser. This is very helpful in many cases, for example when working with some dialog box or 3rd page of a navigation wizard and so on. In these cases you want to see the changes but reloading the browser to see the changes takes the app back to initial screen.
![Webpack & The Hot Module Replacement](https://cdn-ak-scissors.b.st-hatena.com/image/square/b269089f5745ae592ce60568d1205d1a20afdc32/height=288;version=1;width=512/https%3A%2F%2Fmiro.medium.com%2Fv2%2Fresize%3Afit%3A1200%2F1%2ADoOmboEYHv0sgSjaOWo0Qw.png)