How much async JavaScript do I need before React?
You should be comfortable with promises, async/await, and fetching data from an API. Almost every real React application fetches data, and useEffect combined with async calls is one of the first things you will build.
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More FAQs in What You Should Know Before Learning React in 2025
You can try, but it will be painful and slow. React is built on JavaScript, so every concept in React assumes you understand JavaScript fundamentals. Strengthening your JavaScript first is the highest-leverage thing you can do before starting React.
No. Learn plain React first. TypeScript is a valuable next step, but adding it before you understand React itself doubles the cognitive load. Get comfortable with React, then layer TypeScript on top.
Yes, the basics. You should understand HTML structure, common tags, and CSS layout including flexbox. You do not need to be a designer, but you should be able to build a simple, clean UI without React first.
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