Josh Comeau

Why React re-renders  ↦

Josh Comeau takes times to answer the question that many of us have asked ourselves, but never sought out an answer to: exactly how does React’s re-rendering process work?

There are a lot of misconceptions out there about this topic, and it can lead to a lot of uncertainty. If we don’t understand React’s render cycle, how can we understand how to use React.memo, or when we should wrap our functions in useCallback?


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