ethereal,
<!doctype html>
<html lang="ru">
<head>
<meta charset="UTF-8">
<title>Document</title>
<style type="text/css">
.item {
width: 300px;
height: 300px;
margin: 20px;
background: skyblue;
}
.item-inner {
width: 100px;
height: 300px;
background: gray;
}
</style>
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.5.1/jquery.min.js"></script>
<link rel="stylesheet" href="https://ajax.googleapis.com/ajax/libs/jqueryui/1.11.4/themes/smoothness/jquery-ui.css">
<script src="https://cdnjs.cloudflare.com/ajax/libs/waypoints/4.0.1/jquery.waypoints.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/animejs/3.2.0/anime.min.js"></script>
<script>
$(function() {
$('.item-inner').waypoint(function() {
var el = this.element, {duration, delay} = el.dataset;
var CSStransforms = anime({
targets: el,
width: [300],
easing: "easeOutSine",
duration,
delay,
complete: _ => el.remove()
});
}, {
offset: '100%'
});
});
</script>
</head>
<body>
<div class="item">
<div class="item-inner" data-duration="2000" data-delay="1000"></div>
</div>
<div class="item">
<div class="item-inner" data-duration="1000" data-delay="3000"></div>
</div>
<div class="item">
<div class="item-inner" data-duration="2000" data-delay="3000"></div>
</div>
<div class="item">
<div class="item-inner" data-duration="1500" data-delay="2500"></div>
</div>
<div class="item">
<div class="item-inner" data-duration="1000" data-delay="1000"></div>
</div>
</body>
</html>