hooks use-window-focus.tsx

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  import { useState, useEffect } from "react";
 
const useWindowFocus = () => {
  const [focused, setFocused] = useState(false);
 
  useEffect(() => {
    // First render
    setFocused(document.hasFocus());
 
    const onFocus = () => setFocused(true);
    const onBlur = () => setFocused(false);
 
    window.addEventListener("focus", onFocus);
    window.addEventListener("blur", onBlur);
 
    return () => {
      window.removeEventListener("focus", onFocus);
      window.removeEventListener("blur", onBlur);
    };
  }, []);
 
  return focused;
};
 
export default useWindowFocus;