It was good to be able to handle various data structures with JavaScript. However, the mouse click sound is very loud when the speed is fast, so on days when I can't concentrate, I have an unfortunate incident where I can't concentrate even more. I highly, highly recommend a silent mouse. If you look at the reviews, there are some parts that say the implementation is lacking, but personally, I think the explanation was good, and the parts that I felt were lacking are purely my own understanding and concentration issues. Anyway, I listened well, and I hope the mouse sound is improved.