Textarea with word limit

Renders a textarea component with a word limit.

  • Use the useState() hook to create a state variable, containing content and wordCount. Use the value prop and 0 as the initial values respectively.
  • Use the useCallback() hooks to create a memoized function, setFormattedContent, that uses String.prototype.split() to turn the input into an array of words.
  • Check if the result of applying Array.prototype.filter() combined with Boolean has a length longer than limit. If it does, trim the input. Otherwise return the raw input, updating state accordingly in both cases.
  • Use the useEffect() hook to call the setFormattedContent method on the value of the content state variable during the initial render.
  • Bind the onChange event of the <textarea> to call setFormattedContent with the value of event.target.value.
const LimitedWordTextarea = ({ rows, cols, value, limit }) => {
  const [{ content, wordCount }, setContent] = React.useState({
    content: value,
    wordCount: 0

  const setFormattedContent = React.useCallback(
    text => {
      let words = text.split(' ').filter(Boolean);
      if (words.length > limit) {
          content: words.slice(0, limit).join(' '),
          wordCount: limit
      } else {
        setContent({ content: text, wordCount: words.length });
    [limit, setContent]

  React.useEffect(() => {
  }, []);

  return (
        onChange={event => setFormattedContent(event.target.value)}
  <LimitedWordTextarea limit={5} value="Hello there!" />,