This is a fun and informative lecture. You can learn how to apply the basic concepts of React, TS, and JS to real-world scenarios. It was very beneficial because I was able to implement the same UI in many different ways and learn many good methods for each requirement. I think it's a lecture in the style of a professor who suggests realistic directions like a mentor, but also encourages thinking without telling you everything. So, when I listen to the lecture, I naturally think, "I think I would do it this way?" and I can enjoy listening while thinking, "Why did you write this part like this?" For example, in the part where the hidden attribute is written in capital letters because React forcibly type-converts it, I thought, "Since I accessed it with ref anyway, can't I just assign the attribute with the setAttribute method?" I had the opportunity to think, and I also learned a lot of practical tips, such as using closures and how to handle the type of GNB more safely and readably. Thank you for creating this great lecture. I'm learning a lot thanks to you!