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Intermediate 7 lessons · free

React tutorial Components, state and modern frontends.

React — build user interfaces from components. Every lesson has a runnable example you can edit, key points, a practice task, a quiz and interview questions.

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Lessons

What you'll learn

  1. 01React introductionWhat React is, why teams use it, and rendering your first component.
  2. 02JSXWriting HTML-like markup in JavaScript, expressions in braces and JSX rules.
  3. 03Components & propsSplitting UI into components and passing data with props.
  4. 04State with useStateMaking components interactive with the useState hook.
  5. 05Events & formsHandling clicks and input, and building controlled form fields.
  6. 06Lists, keys & conditional renderingRendering arrays with map, choosing keys, and showing things conditionally.
  7. 07Effects with useEffectRunning side effects — timers, data loading, subscriptions — and cleaning up.