Wrong placeholder size when using jQuery & box-sizing: border-box

[jukkakoskinen]

Just noticed that the placeholder's size is determined like this:

if (this.opts.forcePlaceholderSize) {
  this.placeholder.height(dragging.el.height())
  this.placeholder.width(dragging.el.width())
}

This causes trouble when using box-sizing: border-box, since $.width() and $.height() still operate in content-box mode.

After quick testing, seems like using parseFloat(dragging.el.css('height')) works. This issue doesn't exist when using Zepto.

jQuery fiddle: http://jsfiddle.net/VT5Yz/1/
Zepto fiddle: http://jsfiddle.net/VT5Yz/2/

[rkusa]

Thanks for your effort! Do you like to make a PR?

(seems to be the same issue for touch-dnd)

[jukkakoskinen]

Done. #10 & rkusa/touch-dnd#16

[rkusa]

Awesome, thanks!