My attempt at creating a user interface involved an issue where the input field was not visible initially. After clicking the button, the input would appear on the screen, and I wanted to automatically focus on it.
This is what I tried to achieve: Initially, the parent component of the input had its display property set to 'none', hiding the input from view. When the button was clicked, this property was changed to 'block', revealing the input. My intention was to set focus on the input simultaneously, but my initial approach did not work as expected. Let me share the code with you:
const [inputDisplay, setInputDisplay] = useState("none");
const refInput = useRef(null);
const HandleShowInput = () => {
setInputDisplay("block");
refInput.current.focus();
};
return (
<>
<Box theme={inputDisplay}>
<Input ref={refInput}/>
<Box/>
<Button onClick={HandleShowInput}/>
</>
)
The above code did not produce the desired result. However, when I moved the focus-setting logic inside a useEffect hook, it worked successfully. Here is the revised code:
const [inputDisplay, setInputDisplay] = useState("none");
const refInput = useRef(null);
const HandleShowInput = () => {
setInputDisplay("block");
};
useEffect(() => {
refInput.current.focus();
}, [inputDisplay]);
return (
<>
<Box theme={inputDisplay}>
<Input ref={refInput}/>
<Box/>
<Button onClick={HandleShowInput}/>
</>
)
I am seeking insight into why the first approach failed while the second one succeeded. It is possible that I am lacking in either React or CSS knowledge. As a beginner in React development, your guidance would be greatly appreciated. Thank you for understanding any language barriers or awkward phrasing in my explanation.