Feb 14 · 3 min read · useMemo vs useCallback — Stop Re-render Problems the Right Way If you’ve ever heard: “Your component is re-rendering unnecessarily.” Then today’s topic is for you. 🤔 Why Do We Need useMemo & useCallback? In React: Every render recreates function...
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Dec 11, 2025 · 4 min read · Let’s be honest:React Hooks looked scary when they first came out. Everyone pretended they understood them.Everyone nodded like, “Ah yes, useEffect with dependency arrays… totally makes sense.” Meanwhile, inside:“Why does this run 57 times???” But do...
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Dec 6, 2025 · 5 min read · If you are learning React, "Hooks" can feel like magic spells you have to memorize. But they aren't magic—they are just tools to manage your app's brain, hands, and memory. In this guide, we break down the Big 4 Hooks using plain English, simple anal...
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Dec 5, 2025 · 8 min read · 💡 Intro If you’ve used React for more than fifteen minutes, you’ve probably asked yourself: “Why on Earth is this component re-rendering again?… I didn’t touch anything.” Welcome to the club - membership is automatic and free. Luckily, React gives...
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Dec 4, 2025 · 5 min read · 프론트엔드 개발에서 React의 성능 최적화는 떼려야 뗄 수 없는 주제입니다.특히, 컴포넌트의 불필요한 리렌더링을 제어하는 useCallback과 React.memo는 핵심 도구입니다. 이 두 최적화 기법의 원리와 내부 동작 방식(특히 props 비교)을 깊이 있게 파헤쳐 보겠습니다. 1. useCallback 이해하기: 함수 메모이제이션의 필요성 React 컴포넌트가 리렌더링될 때마다, 그 컴포넌트 내부에 정의된 모든 함수는 메모리상에서 새...
Join discussionNov 10, 2025 · 1 min read · As I was preparing for frontend interviews, I realized that one of the trickiest concepts to explain clearly is memoization in React, especially when it comes to optimizing re-renders. So I created this visual to simplify how these three tools work t...
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Oct 8, 2025 · 10 min read · Have you ever started a new web project with React and had to struggle with how to handle things such as state and lifecycle methods? React provides Hooks which are a more direct API to the React concepts you already know: props, state, context, refs...
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Sep 24, 2025 · 3 min read · In a quiet corner of a vibrant garden, a small girl tended to her plants every day. She knew that each plant required care in just the right way—some needed careful watering, some needed tracking, and some required consistent routines. Managing a gar...
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Aug 31, 2025 · 3 min read · 🌱 What Are React Hooks and Why Are They Useful? Hooks were introduced in React 16.8 to make function components more powerful.Before Hooks, developers often used class components to manage state and lifecycle. 👉 Hooks let us “hook into” React featu...
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Aug 13, 2025 · 2 min read · What is useCallback in React JS? UseCallback is a native React JS hook that memorizes functions, preventing them from being recreated every time a component is rendered, unless there's a change in the dependency list. Let's explain with simple exampl...
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