✅Module not found: Error can’t resolve in react | ✅Uncaught ReferenceError | ②⓪②②

The following issues are handled:

1. Module not found: Error can’t resolve ‘child_process’
2. Uncaught ReferenceError: the process is not defined
3. Module Not Found: Can't resolve 'http2'
4. Uncaught ReferenceError: Buffer is not defined
5. Cannot resolve modules fs, net and tls
6. Module not found: Can't resolve 'fs'
7. Module not found: Can't resolve 'tls'
8. How to support polyfills without webpack file
9. etc