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I have a child ponent "Text Input" and passes the value to as a prop like this
export default function MobileInput(props) {
const [mobileNumber, setMobileNumber] = React.useState('');
return (
<View style={styles.inputBox}>
<TextInput
value={mobileNumber}
onChangeText={(number) => setMobileNumber(number)}
onEndEditing={props.saveMobileNumber(mobileNumber)} // here
/>
</View>
);
}
In Parent, I got the value from child
const [mobile, setMobile] = useState('');
const getMobile = (number) => {
number ? setMobile(number) : null; // here's I got this warnning
console.log('getMobile-number-from-child', number);
};
const reSendMobile = () => { // other function I want to call passed on mobile number I got from child ponent
if (mobile?.length) {
alert('Done');
setReSend(false);
setSeconds(10);
} else {
alert('Please write your number before press send!');
}
};
<MobileInput saveMobileNumber={getMobile} />
I see this issue But I'm already using React 16.13.1
I have a child ponent "Text Input" and passes the value to as a prop like this
export default function MobileInput(props) {
const [mobileNumber, setMobileNumber] = React.useState('');
return (
<View style={styles.inputBox}>
<TextInput
value={mobileNumber}
onChangeText={(number) => setMobileNumber(number)}
onEndEditing={props.saveMobileNumber(mobileNumber)} // here
/>
</View>
);
}
In Parent, I got the value from child
const [mobile, setMobile] = useState('');
const getMobile = (number) => {
number ? setMobile(number) : null; // here's I got this warnning
console.log('getMobile-number-from-child', number);
};
const reSendMobile = () => { // other function I want to call passed on mobile number I got from child ponent
if (mobile?.length) {
alert('Done');
setReSend(false);
setSeconds(10);
} else {
alert('Please write your number before press send!');
}
};
<MobileInput saveMobileNumber={getMobile} />
I see this issue But I'm already using React 16.13.1
- What warning you are getting? – Arnab Commented Jul 18, 2020 at 18:08
4 Answers
Reset to default 5TextInputs property onEndEditing accepts a function that is called when text input ends.. Instead of a function, you are passing the result of your props.saveMobileNumber function that is called when the ponent renders. Try passing a function that calls saveMobileNumber instead:
onEndEditing={() => props.saveMobileNumber(mobileNumber)}
Your code will be much easier to read/debug if you avoid keeping the same state in multiple ponents. You can pass mobile and setMobile to the child through props and avoid having to create separate state for the same data.
Try this:
<View style={styles.inputBox}>
<TextInput
value={mobileNumber}
onChangeText={(number) => setMobileNumber(number)}
onEndEditing={() => props.saveMobileNumber(mobileNumber)} // change here
/>
</View>
The event onEndEditing
accepts a function call
Just update to call a arrow function :
onEndEditing={() => props.saveMobileNumber(mobileNumber)}
For me, i was updating activity title outside the useEffect hook. When i moved the code
into useEffect hook, the error just gone.
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