title: Styling the caret in an input text area
body: <p>I came across a website that used styling on the caret for an input text field. I've never seen this before but it looks really nice. I've done a ton of research but there doesn't seem to be a lot of information on how to do it. Please see gif below:</p>
  
  <p><a href="https://i.stack.imgur.com/c6xlM.gif" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/c6xlM.gif" alt="enter image description here"></a></p>
  
  <p>How do you change the colour and height of a caret?</p>
  
  <p>For reference the website is betterment.com.</p>