Top coder has many great front end learning cases to improve skills.
learning video link: https://www.bilibili.com/video/BV1Gg411o7aE?spm_id_from=333.1007.top_right_bar_window_history.content.click&vd_source=2867cb498c0ac3d5b222e5e9dadf6cfd
Notice: This project is slightly changed from the official project.