title: Zepto fallback to jQuery
body: <p>I'm using ZeptoJS for my web app, but I'd like to fall back to jQuery if the browser doesn't support Zepto. Since IE is the only major browser not supported at the moment, I'm tempted to detect IE:</p>
  
  <pre><code>if(navigator.appName == 'Microsoft Internet Explorer'){
      // load jquery
  } else {
      // load zepto
  }
  </code></pre>
  
  <p>but I'd prefer to specificly detect Zepto support and use jQuery in other cases. Is there a feature detection way to do this?</p>