JAVASCRIPT

react state not updating immediately

//In case of hooks, you should use useEffect hook.
const [fruit, setFruit] = useState('');

setFruit('Apple');

useEffect(() => {
  console.log('Fruit', fruit);
}, [fruit])

setstate not updating state immediately

this.setState({pencil:!this.state.pencil}, myFunction)

setstate not updating state immediately

myFunction = () => {
  this.props.updateItem(this.state)
}