React Concepts


  • componentWillMount – Invoked once, on both client & server before rendering occurs.
  • componentDidMount – Invoked once, only on the client, after rendering occurs.
  • shouldComponentUpdate – Return value determines whether component should update.
  • componentWillUnmount – Invoked prior to unmounting component.


  • getInitialState – Return value is the initial value for state.
  • getDefaultProps – Sets fallback props values if props aren’t supplied.
  • mixins – An array of objects, used to extend the current component’s functionality.

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