Guide on correctly setting up and utilizing refs for a themed functional component in TypeScript and React Native

Primary Objective: I aim to have two text inputs where pressing return on the first one will shift the focus to the next input.

Let's begin with the configuration (using TypeScript).

I have a customized text input with specific color settings, and I am utilizing forwardRef to pass the reference if provided. From what I have gathered, this seems to be the correct approach, but there may be room for improvement.

export type TextInputProps = ThemeProps & RNTextInput['props'];

export const TextInput = React.forwardRef<RNTextInput, TextInputProps>((props, ref) => {
...
return <RNTextInput style={[{ backgroundColor, color }, style]} {...otherProps} ref={ref} />;
}

Now, on my interface, I am implementing this component, and upon completing the first input, I want the focus to shift to the next one. The code snippet looks like this:

const secondInput = React.useRef<typeof TextInput>();
const handleFirstInputComplete = () => {
    secondInput.current.focus() // This does not work
}
...
<TextInput onSubmitEditing={handleFirstInputComplete} ...>
<TextInput ... ref={secondInput}> //This also raises an error

Any suggestions on accomplishing this effectively in functional components with custom components and TypeScript?

A sample interactive demonstration is available at this link if you would like to see the complete setup in action.

Answer №1

Your problem will be resolved with this solution.

interface NewCustomInputProps {
    handleComplete: () => void;
}

const NewCustomInput = React.forwardRef<HTMLInputElement, NewCustomInputProps>((props, ref) => {
    return <input ref={ref}/>;
});

const NewParent = () => {
    const anotherInputRef = useRef<HTMLInputElement>(null);
    const handleComplete = () => {
        anotherInputRef?.current?.focus();
    }
    return (<>
        <CustomInput handleCompletion={handleCompletion} />
        <CustomInput ref={anotherInputRef} handleCompletion={() => {}} />
    </>);
}

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