title: Make scrolling when content overflow
body: <p>I have a fixed bottom div using <code>top: 50%; bottom: 0px;</code>. I want a scroller to appear when text overflows the inner content div. If text doesn't overflow I want to hide the scroller.</p>
  
  <p><img src="https://i.stack.imgur.com/DHMMU.jpg" alt="enter image description here"></p>