1. Make sure the application is actually running lmao (actual common)
    • npm start / npm run start
  2. Stop the app and restart (or just do a hard reload the browser)
  3. Always keep the terminal in the project AND the chrome dev tools console in the browser
      • react dev tools
  4. google the exact error msg
  5. always work with ESLint
  6. if nothing works, just compare code with the final code