4

I have a react native custom input component and I'm successfully forwarding its ref to a parent component. Now, I also want to refer to the input in the child itself, How do I do this??

//my imports here

//my text field component
export const MyTextField = React.forwardRef((props, ref) => {

   const [inputValue, setValue] = useState('');

   const clearInput = () => {
      setValue("");
      //I want to get the input by ref here and apply "clear()" method on it
   }


   return (
      <View>
         <TextInput
            /*
             How can i also use this ref to refer to this textinput in The "clearInput" function above
             */
            ref={ref}
            value={inputValue}
            onChangeText={(value) => setValue(value)}
            {...props}
         />
         <IconButton
            icon="close-circle"
            onPress={clearInput}
         />
      </View>
   );
});

1 Answers1

6

This article by Travis Waith-Mair shows what you want to do with details: https://non-traditional.dev/how-to-use-the-forwarded-ref-in-react-1fb108f4e6af

Also there's an npm package of it: https://www.npmjs.com/package/@bedrock-layout/use-forwarded-ref


Here is a snack with examples: https://snack.expo.io/@truetiem/use-forwardedref

If you want to implement it into your code:

// Copy-Pasted the "useForwardedRef" from the linked article by "Travis Waith-Mair"
const useForwardedRef = (ref) =>{
   const innerRef = useRef(null);

   useEffect(() => {
     if (!ref) return;
     if (typeof ref === 'function') {
       ref(innerRef.current);
     } else {
       ref.current = innerRef.current;
     }
   });
 
   return innerRef;
}

export const MyTextField = React.forwardRef((props, ref) => {
   // passing the ref to useForwardedRef hook
   const forwardedRef = useForwardedRef(ref);
   const [inputValue, setValue] = useState('');

   const clearInput = () => {
      setValue("");
      
      // You can access the ref safely with forwardedRef
      forwardedRef.current?.clean();
   }


   return (
      <View>
         <TextInput
            // Passing the forwardedRef here
            ref={forwardedRef}
            value={inputValue}
            onChangeText={(value) => setValue(value)}
            {...props}
         />
         <IconButton
            icon="close-circle"
            onPress={clearInput}
         />
      </View>
   );
});

Ugur Eren
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    This Worked for me. My question was tricky to phrase and make comprehensible, but I'm glad you captured it accurately – Stuart Maleka Jul 17 '21 at 18:07