It would also be handy to have an isSliding property. I'm building the seek-bar for a media-player control, which has a time-display and a seek-bar. Time ticks along as the video plays. However, if I drag the slider handle to seek, I want the time-display to show where the video would start playing from if I release the mouse-button. While I'm sliding, I don't want the time-display to update; that would spoil the UI a bit.

So, I'm trying to make a kind of mutex in my own code to prevent this, and it works well. I grab the mutex in the slide eventhandler, and release it in the stop eventhandler. However, now, if I click in the bar to seek to where the mouse is, the mutex is grabbed but not released, because the stop eventhandler does not fire.

Actually, this looks like a bug, on further inspection. The call on the lines that read (in the click function):

if(this.interaction.pickValue != this.interaction.curValue)
  $(this.element).triggerHandler("slidechange", [e, this.prepareCallbackObj(this.interaction)], o.change);

passes window as the value of the self parameter (to prepareCallbackObj) where I think it's supposed to pass a reference to the slider.

I'll try to fix and submit a patch...

ARGH! Sorry. I was using the stop event instead of the change event. If I subscribe to the change event, all is well.

So, it seems this is an enhancement, but not one that I need, now :-)