title: Programmatically switch themes in Ionic Framework
body: <p>I posted this on the Ionic forum, but I never seem to have luck on their forums, so I thought I'd try here.</p>
  
  <p>I'd like to have options for a "dark" and "light" theme that a user can choose in their settings. What's the best way to go about that? Can I programmatically switch between ionic themes, like dark and stable?</p>
  
  <p>Thanks in advance.</p>