Can you guys suggest the "proper" way to test for support for event.clipboardData?

After a whole lot of poking around, I've realized that window.clipboardData() is triggered in $.on('beforepaste'), while event.clipboardData is triggered in $.on('paste'). So this is where I've gotten:

var pasted = false;

$('#foo')
 // IE9
 .on('beforepaste', function(e) {
  if (window.clipboardData) {
   // blah blah blah

   pasted = true;
   return;
  }
 })

 // Chrome and FF
 .on('paste', function(e) {
  var clp = (e || e.originalEvent).clipboardData;

  // this isn't being triggered in Chrome... why?
  if (clp && !pasted) {
   // blah blah blah

   pasted = true;
   return;
  }

  else if (!pasted) {
   // blah blah blah
  }
 })

But it looks like clp is being returned as undefined. Specifically, I get:

clp -- undefined
e.clipboardData -- undefined
e.originalEvent.clipboardData -- [object DataTransfer]

What am I doing wrong here?