5 really resonants with me. I always hear you have to be Rock solid with JS, HTML and CSS to even think about going near React or similar frameworks. It's hard enough trying to learn one new thing. My strategy on what you should focus on is just look at the applications of the job you want to have and Chase after those. Make projects and become knowledgeable to the point where you can present your skills well on a resume and pass interview questions on the topics.
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