If those are a little too hard, I suggest Edabit! The easiest problems are easier than the 8kyu on Codewars imo, and become comparable as you level up. Codewars is frustrating to me because even the easiest problems require some higher level knowledge I don't yet have, but on Edabit I get to practice what I have learned so far and they provide a link to the MDN or SO pages that will help you get the answer.
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If those are a little too hard, I suggest Edabit! The easiest problems are easier than the 8kyu on Codewars imo, and become comparable as you level up. Codewars is frustrating to me because even the easiest problems require some higher level knowledge I don't yet have, but on Edabit I get to practice what I have learned so far and they provide a link to the MDN or SO pages that will help you get the answer.