Learn this written chapter step-by-step alongside the CodeToCareer series.
Learn how React breaks UIs into reusable LEGO blocks (Components), write JSX, and make interactive click counters with useState.
A React Component is like a custom LEGO brick: you build a <Button /> brick once, and you can snap it onto your navbar, card, or modal 50 times without re-inventing the brick.
In standard JavaScript, updating UI requires manually selecting DOM elements and changing text. In React, your UI is an automatic reflection of your State:
UI = f(state)JSX allows you to write HTML-like tags directly inside JavaScript!
function WelcomeCard({ name }) {
return <h1>Hello, {name}!</h1>;
}useState)?State is memory inside a component. When state changes, React automatically re-renders the component to display the new value!
Think of React state as a score counter on an arcade machine: whenever you score a point, the digital display updates automatically.