title: Using Vanilla Javascript to detect scroll to help make change to navigation CSS
body: <p>I am attempting to detect scroll on a page if it exceeds 100px from a fixed top navigation that has a height of 80px. </p>
  
  <p>The plan is that once the user's scroll, exceeds the mentioned 100px, the navbar will change background color.</p>
  
  <p>I have seen a lot of tutorials on the subject, but all those I have seen are using Jquery. I wish to make this using Vanilla Javascript.</p>