- Dev Build
- local Server
- HMR - Hot Module Replacement
- File Watching Algorithm - written in C++
- Caching - Fast building
- Image Optimisation
- Minification
- Bundling
- compress the file for production
- Consistent Hashing - Read about it.
- Code splitting
- Differential Bundling - support to older version
- Diagnostic
- Good Error Handling
- Gives support to Https as well along with http in case you wanted to test something which requires SSL.
- Tree Shaking - remove unused code
- Transpilation
- Different Dev and Prod Build