In short
React's core building block — reusable functions that return JSX, an HTML-like syntax that compiles into the actual UI. Everything in a React app is composed from these.
How to learn this
- 1Build a small UI broken into 3-4 separate components.
- 2Practice conditional rendering with `&&` and ternaries inside JSX.
- 3Learn JSX's rules: one root element, `className` not `class`, `{}` for JS expressions.
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