script.js

const imageContainer = document.getElementById("image-container");
const loader = document.getElementById("loader");

let isInitialLoad = true;
const count = 10;
const apiKey = "JL72G8DwenGQNDXFzMnIqoOPqjtRKBQgOINxlaq_JoU";
let apiUrl = `https://api.unsplash.com/photos/random?client_id=${apiKey}&count=${count}`;

let imagesLoaded = 0;
let ready = false;
let totalImages = 0;
let photosArray = [];

const updateLoadCount = (count) => {
  apiUrl = `https://api.unsplash.com/photos/random?client_id=${apiKey}&count=${count}`;
}

const imageLoaded = () =>{
  imagesLoaded++;
  if(imagesLoaded === totalImages){
    ready = true;
    loader.hidden = true;
  }
}

const setAttributes = (element, attributes) => {
  for (let key in attributes) {
    element.setAttribute(key, attributes[key]);
  }
};

const displayPhotos = () => {
  imagesLoaded = 0;
  totalImages = photosArray.length;

  photosArray.forEach((photo) => {
    const item = document.createElement("a");
    // item.setAttribute("href", photo.links.html);
    // item.setAttribute("target", "_blank");
    setAttributes(item, {
      href: photo.links.html,
      target: "_blank",
    });

    const img = document.createElement("img");
    // img.setAttribute("src", photo.urls.regular);
    // img.setAttribute("alt", photo.alt_description);
    // img.setAttribute("title", photo.alt_description);

    setAttributes(img, {
      src: photo.urls.regular,
      alt: photo.alt_description,
      title: photo.alt_description,
    });

    img.addEventListener("load", imageLoaded);
    item.appendChild(img);
    const fragment = new DocumentFragment();
    fragment.append(item);
    imageContainer.append(fragment);
  });
};

const getPhotos = async () => {
  try {
    const response = await fetch(apiUrl);
    photosArray = await response.json();
    displayPhotos();
    if(isInitialLoad){
      updateLoadCount(20);
      isInitialLoad = false;
    }
  } catch (error) {}
};

window.addEventListener("scroll", () => {
  if(window.innerHeight + window.scrollY >= document.body.offsetHeight - 1000 && ready){
    ready = false;
    getPhotos();
  }
})

getPhotos();