As you can see in the Console, if you use either the "native" .blur()
DOM method or jQuery ≥1.9.0, the textbox has already blurred by the time the onblur
event handler has been called; but if you use jQuery ≤1.8.3, the textbox is still focused while the onblur
event handler is running.
(Tested in Chrome 48, Safari 8.0.8, and Firefox 41, all on Mac OS X 10.10.5.)