𝗕𝘂𝗶𝗹𝗱𝗶𝗻𝗴 𝗥𝗲𝗮𝗰𝘁 𝗖𝗼𝗺𝗽𝗼𝗻𝗲𝗻𝘁𝘀: 𝗙𝗿𝗼𝗺 𝗝𝗦𝗫 𝘁𝗼 𝗣𝗿𝗼𝗱𝘂𝗰𝘁𝗶𝗼𝗻-𝗥𝗲𝗮𝗱𝘆 𝗖𝗼𝗱𝗲
React components are the foundation of modern web apps. They turn complex interfaces into small, manageable pieces.
React dominates the industry. 57% of JavaScript developers use it as their main library. It hits over 20 million weekly downloads on NPM.
A component is a function that returns JSX. JSX looks like HTML but lives inside your JavaScript. It allows you to build custom elements you can reuse anywhere.
Every professional component has four parts:
• Props: Data passed from a parent to a child. This makes components flexible. • State: Data that changes over time. Updates to state trigger UI changes. • Hooks: Functions like useState and useEffect that give components logic. • Return Statement: The part that defines what shows up on the screen.
Modern React uses function components instead of classes. Function components use less code and are easier to maintain.
To build production-ready code, follow these rules:
• Single Responsibility: Each component should do one thing. A UserProfile component should only show user data. • Use TypeScript: TSX helps you catch errors before you run your code. 90% of frontend developers use it. • Embrace Composition: Build large interfaces by combining small components. Do not build one giant, messy component. • Avoid Prop Drilling: Do not pass data through ten layers of components. Use Context or state management instead. • Never Mutate Props: Treat props as read-only.
Building with components helps you scale. Frameworks like Next.js, Remix, and React Native all rely on these same principles.
Start small. Think modular. Build for reuse.
Source: https://dev.to/julianneagu/building-react-components-from-jsx-to-production-ready-code-3chf