Im passing my app from the class model to the hooks and in my code y have a dropdown list that when executes the onChange method it does this:
filter(event)
{
this.setState({
selectedFilter: event.target.value
},() => { this.chargeInfo(); });
}
In my class model works perfectly, but i dont know how to do this with the hooks, im passing the method chargeInfo() and the variable selectedFilter by the props because this component is a child, so what I have is this code:
<Dropdown onChange={onChangeDropdown} />
const onChangeDropdown = function(event)
{
props.changeSelectedFilter(event.target.value);//this do setSelecedFilter in the parent
props.chargeInfo();//this is the method of the parent that do something
}
How can I adapt this in a Sync mode that execute first the props.changeSelectedFilter and later the props.chargeInfo?.
You may need to use the State Hook like this:
// setting up the default dropdown value
const [dropdownValue, setDropdownValue] = useState('Some Value');
// later, setting a new dropdown value
setDropdownValue('New Value')
See https://reactjs.org/docs/hooks-state.html for more info
I solved using useEffect:
useEffect(
() => {
// eslint-disable-next-line react-hooks/exhaustive-deps
props.chargeInfo();}, [props.selectedFilter]
)
const onChangeDropdown = function(event)
{
props.changeSelectedFilter(event.target.value);
}
return(
<Dropdown style={{ marginRight: 10, }} value={props.selectedFilter} options={filters}
onChange={onChangeDropdown} optionLabel="name" placeholder="Filter by" />
)