Question

I’m trying to detect the HTML5 Drag And Drop support in JavaScript. Modernizr seems to not handle this test case.

Answer 1

You can do this:

if('draggable' in document.createElement('span')) {
  alert("Drag support detected");
}

You can see a quick demo test using the above check here.

Also, there’s a nice feature detection (not browser detection, yay!) list that’s fairly well maintained here in case you’re looking for other HTML5 features as well.