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Install `webpack` and `webpack-dev-server`,
```
npm i --save-dev webpack
npm i --save-dev webpack-dev-server
```

Start the webpack server,
```
webpack-dev-server --env development
```

Watch source for changes and recompile with webpack,
```
webpack --watch
```

View the files in browser,
- AutoRefresh: `http://localhost:8080/webpack-dev-server`
- NoRefresh: `http://localhost:8080/`

Source: https://survivejs.com/webpack/developing/automatic-browser-refresh/