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Tagged with lifecycle

2 cards

React Medium Theory

React lifecycle overview, mount/update/unmount, and class lifecycle methods

Class components expose lifecycle methods across mounting, updating, and unmounting phases.

componentDidMount runs after mount
componentDidUpdate runs after updates
componentWillUnmount is for cleanup

#classes #lifecycle #react

React lifecycle overview, mount/update/unmount, and class lifecycle methods

React Hard Theory

shouldComponentUpdate, getDerivedStateFromProps, getSnapshotBeforeUpdate, and hooks vs lifecycle coverage

Some class lifecycle methods exist for optimization, derived state, or pre-commit DOM reads, and hooks do not map one-to-one with every lifecycle scenario.

shouldComponentUpdate controls update skipping
getDerivedStateFromProps is niche and often misused
getSnapshotBeforeUpdate captures DOM info before commit

#advanced #lifecycle #react

shouldComponentUpdate, getDerivedStateFromProps, getSnapshotBeforeUpdate, and hooks vs lifecycle coverage