Web Reference: Master the distinction between initial renders and re-renders in React. Learn lifecycle differences, hook behavior, and optimization strategies for both phases. For the initial render, React will use the appendChild() DOM API to put all the DOM nodes it has created on screen. For re-renders, React will apply the minimal necessary operations (calculated while rendering!) to make the DOM match the latest rendering output. Feb 8, 2022 · The guide explains what re-renders are, what a necessary and unnecessary re-render is, what can trigger a React component re-render. Also includes most important patterns that can help prevent re-renders and a few anti-patterns that lead to unnecessary re-renders and poor performance as a result.
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