<link href="//maxcdn.bootstrapcdn.com/bootstrap/4.1.1/css/bootstrap.min.css" rel="stylesheet" id="bootstrap-css">
<script src="//maxcdn.bootstrapcdn.com/bootstrap/4.1.1/js/bootstrap.min.js"></script>
<script src="//cdnjs.cloudflare.com/ajax/libs/jquery/3.2.1/jquery.min.js"></script>
<h1>parallax effect</h1>
<div id="del1" class="delayed-section" data-scrub="0.4">
<div class="innerContainer">
<img width="575" src="https://picsum.photos/575/745?index=1" alt="">
</div>
</div>
<div id="del2" class="delayed-section" data-scrub="0.2">
<div class="innerContainer">
<img width="575" src="https://picsum.photos/575/745?index=2" alt="">
</div>
</div>
<div id="del3" class="delayed-section" data-scrub="0.6">
<div class="innerContainer">
<img width="575" src="https://picsum.photos/575/745?index=3" alt="">
</div>
</div>
<script src="https://cdnjs.cloudflare.com/ajax/libs/gsap/3.4.1/gsap.min.js"></script>
<script src="https://assets.codepen.io/16327/ScrollTrigger.min.js?v=55"></script>
<script>
const delSections = document.querySelectorAll(".delayed-section");
delSections.forEach(section => {
const containerAnim = gsap.to(section.querySelector(".innerContainer"), {
y: "100vh",
ease: "none"
});
const imageAnim = gsap.to(section.querySelector("img"), {
y: "-100vh",