npm install aos

C++
CSS
<link href="https://unpkg.com/[email protected]/dist/aos.css" rel="stylesheet">

JS
<script src="https://unpkg.com/[email protected]/dist/aos.js"></script>

INITIALIZE AOS:
<script>
  AOS.init();
</script>  <div data-aos="fade-up" data-aos-anchor-placement="top-center">
Source

Also in C++: