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preloader.js
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preloader.js
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(function ($) {
// preloader
// number of loaded images for preloader progress
const $preloader = $('#preloader');
const $images = $('img');
let loadedCount = 0; //current number of images loaded
let imagesToLoad = $images.length; //number of slides with .bcg container
let loadingProgress = 0; //timeline progress - starts at 0
$images.imagesLoaded({
background: true
}).progress(function (instance, image) {
loadProgress();
});
function loadProgress(imgLoad, image) {
//one more image has been loaded
loadedCount++;
loadingProgress = (loadedCount / imagesToLoad);
// GSAP tween of our progress bar timeline
TweenMax.to(progressTl, 0.2, {progress: loadingProgress, ease: Linear.easeNone});
}
//progress timeline
const progressTl = new TimelineMax({
paused: true,
onUpdate: progressUpdate,
onComplete: loadComplete
});
progressTl
//tween the progress bar width
.to($('.progress span'), 1, {width: 100, ease: Linear.easeNone});
//as the progress bar width updates and grows we put the percentage loaded in the screen
function progressUpdate() {
//the percentage loaded based on the tween's progress
loadingProgress = Math.round(progressTl.progress() * 100);
}
function loadComplete() {
// preloader out
const preloaderOutTl = new TimelineMax();
preloaderOutTl
.to($('.progress'), 0.3, {y: 100, autoAlpha: 0, ease: Back.easeIn})
.to($('#preloader img'), 0.3, {y: 100, autoAlpha: 0, ease: Back.easeIn}, 0.1)
.set([$('body'), $('html')], {className: '-=is-loading'})
.to($preloader, 0.7, {autoAlpha: 0, ease: Power4.easeInOut})
.set($preloader, {className: '+=is-hidden'});
return preloaderOutTl;
}
})(jQuery);