What are web applications to consolidate knowledge for implementation in native javascript?

Question

IT education

Hi all! I want to consolidate my knowledge of native javascript, but I have no idea what can be implemented, and if there is an idea, there is no understanding of how it works, I have already done something like todolist, a timer with customization options, a loan calculator, can you tell me what other interesting projects there are for practice

Answer 1

Any project with at least 5000 lines of non-repeating code. Thus, a skill is obtained.