infinite scroll

참고

Infinite-scroll use React hooks

• link link - 해결법이 좋아 보인다
• link
• IntersectionObserver - Browser support](https://github.com/w3c/IntersectionObserver/tree/master/polyfill#browser-support) Image Lazy Load 구현해 보기

const options = {threshold: 0}
const observer = new IntersectionObserver((entries, observer) => {
    entries.forEach(entry => {
        if (entry.isIntersecting) {
            observer.unobserve(entry.target)
            entry.target.src = entry.target.dataset.src
        }
    })
}, options)
observer.observe(Array.from(document.getElementsByClassName('lazy')))