<!-- BEGIN COPY / PASTE -->
        const observer = new IntersectionObserver((entries) => {
            entries.forEach(entry => {
                if (entry.isIntersecting) {
                    console.log('Element is in view:', entry.target);
                }
            });
        });

        const targetElement = document.querySelector('#target');
        observer.observe(targetElement);
        <!-- END COPY / PASTE -->