React - useRef and useEffect hooks for scrolling the last item of the loop to be visible

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added Mar 18 in React by lcjr First Warrant Officer (11,830 points)

To ensure that the last item of the loop is always visible in the middle of the screen after a search, you can use a combination of React's useRef and useEffect hooks along with DOM manipulation. Here's how you can modify your code to achieve this:

  1. Add a ref to the last item in your loop.
  2. Use useEffect to scroll the last item into view after each search.

Here's an example of how you can modify your code:

// useState hook
const PageMain = () => {
  const [lastItemRef, setLastItemRef] = useState(null);
  
  // Effect to scroll the last item into view after each search
  useEffect(() => {
    if (lastItemRef) {
      lastItemRef.scrollIntoView({ behavior: 'smooth', block: 'center' });
    }
  }, [lastItemRef]);
  
  
  // in JSX
  {resultList.map((question, index) => (
            <div 
              key={index} 
              ref={index === resultList.length - 1 ? setLastItemRef : null}
            >

 

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