This lecture is free... Thank you so much!! In paid lectures or boot camps, they ignore the basics or operating principles and only teach you how to code without thinking, saying it's practical React code, so my basics were a bit vague. (It's just a coder robot training factory...ㅠㅠ) So I got a refund and chose this lecture to build up the basics step by step through self-study.. I'm so happy... React official documentation + Sopl's lecture = a perfect match✨