Testing your sites on mobile devices is a critical part of the development process. Webpack dev server enables you to visit the server from any device using the host option. This lesson walks you through accessing webpack dev server using an iPhon
Check you ip address:
ifconfig
For scripts:
"start": "webpack-dev-server --open --hot --host 0.0.0.0 --port 4000"
After running the application, go to your ip address:port on your iphone, you should be able to access the app and hot reloading enabled
[Webpack] Access Webpack Dev Server from Mobile Safari on an iPhone
原文：http://www.cnblogs.com/Answer1215/p/6725882.html