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meandmax/react-lifecycle-cheatsheet.md

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Created October 2, 2018 06:36
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React lifecycle cheatsheet
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react-lifecycle-cheatsheet.md

React lifecycle cheatsheet

Method Side effects1 State updates2 Example uses
Mounting
componentWillMount ✓ Constructor equivalent for createClass
render Create and return element(s)
componentDidMount ✓ ✓ DOM manipulations, network requests, etc.
Updating
componentWillReceiveProps ✓ Update state based on changed props
shouldComponentUpdate Compare inputs and determine if render needed
componentWillUpdate Set/reset things (eg cached values) before next render
render Create and return element(s)
componentDidUpdate ✓ ✓ DOM manipulations, network requests, etc.
Unmounting
componentWillUnmount ✓ DOM manipulations, network requests, etc.

For more information see here.

  1. "Side effects" refer to modifying variables outside of the instance, async operations, etc.
  2. "State updates" refer to the current instance only (eg this.setState).
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