const StickyCta = () => {
  const [show, setShow] = React.useState(false);
  React.useEffect(() => {
    const on = () => setShow(window.scrollY > 800);
    on(); window.addEventListener("scroll", on);
    return () => window.removeEventListener("scroll", on);
  }, []);
  return (
    <a href="#booking" className={`sticky-cta ${show?"show":""}`}>
      Записаться
      <span className="pulse"><Icon name="sparkle" size={16}/></span>
    </a>
  );
};

Object.assign(window, { StickyCta });