update object in react hooks

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showing results for - "update object in react hooks"
Samuel
23 Apr 2019
1- Through Input
2
3        const [state, setState] = useState({ fName: "", lName: "" });
4        const handleChange = e => {
5            const { name, value } = e.target;
6            setState(prevState => ({
7                ...prevState,
8                [name]: value
9            }));
10        };
11
12        <input
13            value={state.fName}
14            type="text"
15            onChange={handleChange}
16            name="fName"
17        />
18        <input
19            value={state.lName}
20            type="text"
21            onChange={handleChange}
22            name="lName"
23        />
24   ***************************
25
26 - Through onSubmit or button click
27    
28        setState(prevState => ({
29            ...prevState,
30            fName: 'your updated value here'
31         }));
32
source
Monica
26 Jan 2016
1const [currentApp, setCurrentApp] = useState({
2        userID: null,
3        hospitalName: null, 
4        hospitalID: null,
5        date: null,
6        time: null,
7        timestamp: null,
8        slots: 1,
9        appointmentType: null
10    })
11    
12const [appointmentType, setAppointmentType] =  useState({
13        Granulocytes: {
14            bloodType:null,
15            message: null
16        }
17})
18
19const handleGranChange = (e) => {
20        setAppointmentType({...appointmentType, Granulocytes : {
21            ...appointmentType.Granulocytes, 
22            [e.target.id] : e.target.value}
23        })
24		setCurrentApp({ ...currentApp, ['appointmentType'] : appointmentType  })
25        console.log(currentApp)
26}
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