StartBeginner25 min read
1. Why React
React Basics · 16 pages source format
UI as a function of state — the mental model that unlocks everything else.
What you'll learn
- Components
- Declarative UI
- When not to use React
Key idea
React lets you describe UI from state instead of manually mutating the DOM. Components compose like Lego.
Quick check
React is primarily about…
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Practice
Create a Vite React app and render a Hello component.
export default function Hello({ name }) {
return <h1>Hello {name}</h1>
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