JavaScriptProjectInfiniteScroll/script.js at master · jthinlay/JavaScriptProjectInfiniteScroll · GitHub

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constimageContainer=document.getElementById('image-container');
constloader=document.getElementById("loader");

letready=false;
letimagesLoaded=0;
lettotalImages=0;
letisInitialPhotosLoad=true;

letphotosArray=[];

// helper Function to Set Attributes on DOM Elements
functionsetAttributes(element,attributes){
for(constkeyinattributes){
element.setAttribute(key,attributes[key]);
}
}

// Unsplash API URL
letinitialPhotoCount=5;

letunsplashApiUrl=`https://api.unsplash.com/photos/random/?client_id=${apiKey}&count=${initialPhotoCount}`;

functionupdateApiUrlWithNewCount(pictureCount){
unsplashApiUrl=`https://api.unsplash.com/photos/random/?client_id=${apiKey}&count=${pictureCount}`
}
//Check if all images were loaded
functionimageLoaded(){
imagesLoaded++;
if(imagesLoaded===totalImages){
ready=true;
loader.hidden=true;
}
}

// Create Elements for links and Photos, Add to DOM
functiondisplayPhotos(){
imagesLoaded=0;
totalImages=photosArray.length;
console.log('total images:',totalImages)
loader.hidden=true;
photosArray.forEach((photo)=>{
constitem=document.createElement('a');
// item.setAttribute('href', photo.links.html);
// item.setAttribute('target', '_blank');

setAttributes(item,{
href: photo.links.html,
target: '_blank'
})

constimg=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
})
// Event Listener, check when each is finished loading
img.addEventListener('load',imageLoaded);

//Put <img> inside <a>, then put both inside imageContainer Element
item.appendChild(img);
imageContainer.appendChild(item);
})
}

asyncfunctiongetUnsplashApiPhotos(){
try{
constresponse=awaitfetch(unsplashApiUrl);
photosArray=awaitresponse.json();
displayPhotos();
if(isInitialPhotosLoad){
updateApiUrlWithNewCount(30);
isInitialPhotosLoad=false;
}
}catch(error){
console.log("Whoops! something went wrong",error)
}
}

// Check to see if scrolling near bottom of page, load more photos
window.addEventListener('scroll',()=>{
if(window.innerHeight+window.scrollY>=document.body.offsetHeight-1000&&ready){
ready=false;
getUnsplashApiPhotos();
}
})
getUnsplashApiPhotos();