title: Prevent scrolling a div with CSS?
body: <p>I'm looking at this demo page:</p>
  
  <p><a href="http://www.ymc.ch/sandbox/hamburger/mobile-menu-demo.html" rel="noreferrer">http://www.ymc.ch/sandbox/hamburger/mobile-menu-demo.html</a></p>
  
  <p>Which has this code behind it:</p>
  
  <p><a href="https://github.com/ymc-thzi/mobile-menu-hamburger" rel="noreferrer">https://github.com/ymc-thzi/mobile-menu-hamburger</a></p>
  
  <p>In general it works great but when the menu is open on my macbook I can use two fingers to scroll and move the white body div around. How could I prevent that using CSS?</p>