/* Main app */ const { useState: useStateApp, useEffect: useEffectApp } = React; function StickyCTA() { const [show, setShow] = useStateApp(false); useEffectApp(() => { const onScroll = () => setShow(window.scrollY > 800); window.addEventListener("scroll", onScroll, { passive: true }); return () => window.removeEventListener("scroll", onScroll); }, []); return (