<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> <!------ Include the above in your HEAD tag ----------> <div class="container"> <div class="row"> <img src="http://lorempixel.com/400/400/" /> </div> </div> <script src="https://cdnjs.cloudflare.com/ajax/libs/gsap/1.18.4/TweenMax.min.js"></script> <script> var docElement = document.documentElement; var tl = new TimelineMax({ repeat: -1, yoyo: true, onUpdate: updateRoot }); var cs = getComputedStyle(docElement, null); var blur = { value: cs.getPropertyValue("--blur") }; tl.to(blur, 2, { value: "25px" }); function updateRoot() { docElement.style.setProperty("--blur", blur.value); } </script>

:root { --blur: 0px; } img { -webkit-filter: blur(var(--blur)); filter: blur(var(--blur)); }