title: How can I check for real touch support on a browser
body: <p>Today (or very recently) Chrome Beta updated to 17 for me and with it i noticed some funkiness in my web app. I noticed it was because a class was being added to the body element that normally only gets put there if there is touch event support which I check like this:</p>
  
  <pre><code>  try {  
      document.createEvent("TouchEvent");
      _device.touch = true;
    } catch (e) {
      _device.touch = false;
    }
  </code></pre>
  
  <p>And sure enough, i can create and trigger touch events on Chrome 17. First idea i had was, oh, i can check for touch, and see if a mouse click fails, therefore, there's a mouse, but MouseEvents trigger too.</p>
  
  <p>How else can I check, without user agent sniffing, that it's an actual, touchable, device, and not just a browser that supports touch events.</p>