Where can I practice of more javascript basics

Hi all, I fear that i’m not good enough in vanilla javascript, and would like to practice more questions, could you please recommend a url to practice coding challenges that has a similar way of teaching as mosh does?

Not sure about tutorials that are quite the same as Mosh, but Laracast and LinkedIn Learning have some good content. Also, Codwars and HackerRank are excellent places to keep practicing.