Introduction React JS is powerful, but many beginners struggle not because React is hard — but because of common mistakes made early on . These mistakes can lead to confusing bugs, poor performance, and messy code that becomes difficult to maintain. In this article, we’ll cover the most common React JS mistakes beginners make , explain why they happen , and show how to fix them properly . If you’re learning React or recently started building projects, this guide will save you hours of frustration. 1. Modifying State Directly One of the most frequent beginner mistakes is changing state directly instead of using the state updater function. ❌ Wrong Example count = count + 1 ; This does not trigger a re-render. ✅ Correct Way setCount (count + 1 ); Why This Matters React relies on state updates to know when to re-render . Direct mutation breaks that mechanism and causes unpredictable UI behavior. 2. Using State When It’s Not Needed Beginners often store everything in state...
Introduction After understanding why developers use React JS , the next important step is learning how React actually works . Many beginners feel confused by terms like components , state , and props — even though these are the core concepts of React. In this article, we’ll break down how React JS works , using simple explanations and clear examples , without unnecessary complexity. How React JS Thinks About the UI Traditional websites update the page by reloading everything. React takes a different approach. React treats the user interface as: A collection of small, reusable pieces called components Each component controls: What is displayed How it behaves When it updates When data changes, React automatically updates the affected parts of the UI. What Are Components in React? A component is a reusable piece of the interface. Examples of components: Button Navbar Card Form Footer Instead of writing HTML repeatedly, React lets you build o...