Answers for "react componentDidUpdate"

2

component did update arguments

componentDidUpdate(prevProps, prevState) {
  // only update chart if the data has changed
  if (prevProps.data !== this.props.data) {
    this.chart = c3.load({
      data: this.props.data
    });
  }
}
Posted by: Guest on October-05-2020
0

componentDidUpdate

componentDidUpdate(prevProps, prevState) {
  if (prevState.pokemons !== this.state.pokemons) {
    console.log('pokemons state has changed.')
  }
}
Posted by: Guest on November-10-2020
1

componentdidupdate in hooks

const App = props => {
  const didMountRef = useRef(false)
  useEffect(() => {
    if (didMountRef.current) {
      doStuff()
    } else didMountRef.current = true
  }
}
Posted by: Guest on November-02-2020
1

shouldcomponentupdate

shouldComponentUpdate(nextProps, nextState) {
  return true;
}
Posted by: Guest on June-08-2020
0

prev props

componentDidUpdate(prevProps) {
  // Utilisation classique (pensez bien à comparer les props) :
  if (this.props.userID !== prevProps.userID) {
    this.fetchData(this.props.userID);
  }
}
Posted by: Guest on June-29-2020

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