Currently, I can detect when a user pulled a file from a browser window in any browser other than Safari in OS X. All other browsers seem to give some hints in the dragleave event. For example, in Chrome, event.clientX and event.clientY are set to 0. In Firefox, event.relatedTarget is null. However, there are no such prompts in Safari on OS X. Does anyone know how I can determine when a user pulled a file out of a browser window (after dragging it into a window) in that browser?
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