aos js

  <script src="https://unpkg.com/aos@next/dist/aos.js"></script>
  <script>
    AOS.init();
  </script>

  <link rel="stylesheet" href="https://unpkg.com/aos@next/dist/aos.css" />

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>

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

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

<script>
  AOS.init();
</script>

<div data-aos="zoom-in-left"></div>

<div data-aos="zoom-in-right"></div>