Change Text Entry Variable without control losing focus?

I thought I'd put this here in case anybody finds it useful. This problem was driving me crazy and I didn't like any of the suggested solutions. I solved it using jQuery because I'm still using Storyline 3, but I'm sure you could achieve the same thing in a slightly more long-winded way with straight javascript.

I created an Execute JavaScript trigger to run at timeline start:

$(function() {
  $("input").keyup(function() {
    $(this).blur();
    $(this).focus();
  });
});

Basically it causes the active input element to lose focus very briefly after every keystroke, thereby activating the "control loses focus" trigger, to which you can attach any action you like on a case-by-case basis. In theory the split second loss of focus could cause problems but in practice I have yet to experience any.

Because it works on any unspecified input element you can also put it inside your Slide Master to apply to every slide.