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how to receive updated props in react js?


By : lovecookie
Date : October 18 2020, 08:10 AM
around this issue You should use componentDidUpdate(prevProps, prevState)
componentDidUpdate is invoked anytime the component is about the receive new props or internal state, here you can intervene before the component is rerendered.
code :
componentDidUpdate(prevProps) {
  if (prevProps.src !== this.props.src) {
    this.test()
  }
}


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React TransitionGroup and React.cloneElement do not send updated props


By : R.S.
Date : March 29 2020, 07:55 AM
seems to work fine Determining Entering and Leaving Children
Imagine rendering the sample JSX below:
code :
<TransitionGroup>
  <div key="one">Foo</div>
  <div key="two">Bar</div>
</TransitionGroup>
[
  { type: 'div', props: { key: 'one', children: 'Foo' }},
  { type: 'div', props: { key: 'two', children: 'Bar' }}
]
<TransitionGroup>
  <div key="two">Bar</div>
  <div key="three">Baz</div>
</TransitionGroup>
[
  { type: 'div', props: { key: 'two', children: 'Bar' }},
  { type: 'div', props: { key: 'three', children: 'Baz' }}
]
function childFactory(child) {
  return React.cloneElement(child, {
    transitionState,
    dispatch
  })
}
var ConnectedTransitionGroup = connect(
  store => ({
   transitionState: state.transitions
  }),
  dispatch => ({ dispatch })
)(TransitionGroup)

render() {
  return (
    <ConnectedTransitionGroup childFactory={childFactory}>
      {children}
    </ConnectedTransitionGroup>
  )
}

Can't receive updated props after ajax call (react)


By : bethu
Date : March 29 2020, 07:55 AM
fixed the issue. Will look into that further Get a func that send data to server , Your reducer
code :
[types.SENDED_DATA] : (state, action) => 
   return { ...state,
      data: Immutable.fromJS(action.d),ata
      isLoading: false
   }
shouldComponentUpdate (nextProps) {
    return nextProps.data !== this.props.data
}

componentDidUpdate (prevProps) {
    if(prevProps.data !== this.props.data) {
       //do smthing that you need, data was changed
      this.props.IncomeListProfile();
    }
}

why I am not getting updated props value in react


By : user2653196
Date : March 29 2020, 07:55 AM
I wish did fix the issue. The reason is at the point of printing the value in the console the props are not updated. When the props are updated the react component re-renders and display the counter value. To check that you can use a setTimeout.
code :
  handle=()=>{
    this.props.decrement();
    setTimeout(this.getCount,10)
  }
   componentDidUpdate(prevProps) {
    if (this.props.counter !== prevProps.counter) {
      console.log(this.props.counter);
    }
  }
  componentWillReceiveProps(newProps) {
  if( newProps.counter != this.props.counter ) {
    console.log(newProps.counter);
  }
}
  static getDerivedStateFromProps(nextProps, prevState) {
  if(nextProps.counter !== prevState.counter ) {
     console.log(nextProps.counter);
  }
}

How to receive props only after state of parent has updated?


By : user3191472
Date : March 29 2020, 07:55 AM
should help you out Don't use componentWillReceiveProps, that will be deprecated in later versions of React.
But also, you can just setup conditional logic in your life-cycle methods to determine what code to execute.
code :
componentWillReceiveProps(nextProps){
    //condition says if both value are truthy then run code.
    if(nextProps.lngt && nextProps.latd){
         this.getWeather(nextProps)
    }
}
componentDidUpdate(){
    //condition says if both value are truthy then run code.
    if(this.props.lngt && this.props.latd){
         this.getWeather(this.props)
    }
}

react-google-maps map not updated when passed props and the marker is one location behind when updated


By : Aditya Mattoo
Date : March 29 2020, 07:55 AM
may help you . Add a key to GoogleMap component. a Key should be unique each time provided. for your testing use new Date().getTime() function.
code :
<GoogleMap key={new Date().getTime()}/>
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