title: Prevent scrolling on "lower" div
body: <p>I have on my website a sidebar that can come out from the side on mobile. It is a fixed element, which does not play nice on mobile browsers. I want to prevent being able to scroll the body of the document in order to fix this when scrolling on the sidebar div (but I still want them to be able to scroll the sidebar if there is an overflow).</p>
  
  <p>Here is a video of what I want to prevent:</p>
  
  <p><a href="https://www.youtube.com/watch?v=uqWll2G2Km8&amp;feature=youtu.be" rel="nofollow noreferrer">https://www.youtube.com/watch?v=uqWll2G2Km8&amp;feature=youtu.be</a></p>