How to get the height of the text inside of a textarea

Question

I have a textarea with the the text Hello World. I would like to get the height of this text.

I\'ve tried to use:

var eleme         


        

Answer 1

For anyone using React:

const textarea_ref = useRef(null);
const [idealHeight,setIdealHeight] = useState(0);
const [inputValue,setInputValue] = useState("");


useLayoutEffect(() => {                                           // useLayoutEffect TO AVOID FLICKERING
    textarea_ref.current.style.height = '0px';                    // NEEDS TO SET HEIGHT TO ZERO
    const scrollHeight = textarea_ref.current.scrollHeight;       // TO READ THE CORRECT SCROLL HEIGHT WHEN IT SHRINKS
    textarea_ref.current.removeAttribute('style');                // REMOVE INLINE STYLE THAT WAS ADDED WITH 0px
    setIdealHeight(scrollHeight + 2);                             // NEEDS TO ADD 2. I THINK IT'S BECAUSE OF THE BORDER
  },[inputValue]);

return (
  );
</code></pre>
<p>PS: It still flickers sometimes. At least in Chrome.</p>
    </p>
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