This is a lecture that I have never heard of before, and it is a lecture that allows people who do not know even the letter J in JS to learn the basics. There is a systematically organized curriculum, so there is no section where the difficulty level suddenly increases in the middle of the lecture. However, it is not a method that teaches everything from A to Z, but rather, you have to look up other necessary things yourself to some extent. This was a process that gave me an experience of learning more deeply from the lecture content than what I did not know. While taking this lecture, I came to clearly understand why JS is used and the power it possesses.