prevstate in usestate
const [prevState, setState] = React.useState([]);
setState(prevState => [...prevState, 'somedata'] );prevstate in usestate
const [prevState, setState] = React.useState([]);
setState(prevState => [...prevState, 'somedata'] );usestate nested object
const [currentApp, setCurrentApp] = useState({
userID: null,
hospitalName: null,
hospitalID: null,
date: null,
time: null,
timestamp: null,
slots: 1,
appointmentType: null
})
const [appointmentType, setAppointmentType] = useState({
Granulocytes: {
bloodType:null,
message: null
}
})
const handleGranChange = (e) => {
setAppointmentType({...appointmentType, Granulocytes : {
...appointmentType.Granulocytes,
[e.target.id] : e.target.value}
})
setCurrentApp({ ...currentApp, ['appointmentType'] : appointmentType })
console.log(currentApp)
}Copyright © 2021 Codeinu
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