I happened to take this course just as I was thinking I needed a deeper dive into frontend development after finishing my studies on React, TypeScript, and Next!! I was already very satisfied with Jeonghwan's other courses, and as expected, this one was also top-tier~ The preliminary explanations about the libraries were especially helpful. I truly enjoyed the clean coding, precise diction, concise explanations, and even the newly added handbook for review. I plan to make this knowledge my own by reviewing it once more. Thank you!!! Frontend is Lee Jeonghwan.