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Manuals / React Basics / Chapter 1

Start · beginner · ~25 min · Chapter 1 of 4

Why React

UI as a function of state — the mental model that unlocks everything else.

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Key idea

React lets you describe UI from state instead of manually mutating the DOM. Components compose like Lego.

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React is primarily about…

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Chapter learning outcomes
  • Components
  • Declarative UI
  • When not to use React

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