Lazy load.ts

export const initLazyloading = (selector: string): void => {     let images = document.querySelectorAll(selector)     if ('IntersectionObserver' in window) {         // Create new observer object         let lazyImageObserver = new IntersectionObserver(function(entries, observer) {             // Loop through IntersectionObserverEntry objects             entries.forEach(function(entry) {                 // Do these if the target intersects with the root                 if (entry.isIntersecting) {                     let lazyImage: any = entry.target                     lazyImage.src = lazyImage.dataset.src                     lazyImage.classList.remove('lazy')                     lazyImage.classList.add('lazyloaded')                     lazyImageObserver.unobserve(lazyImage)                 }             })         })         // Loop through and observe each image         images.forEach(function(lazyImage) {             lazyImageObserver.observe(lazyImage)         })     } }