Instant Feedback on Text Entry

Hello,

I am wondering if it is possible to make instant feedback for text entry boxes.

As a learner enters in text in a text entry box, if they click into the box and leave it blank, or type in the wrong answer. I'd like if instant feedback could pop up to show if their entry is correct or incorrect.

Is this possible?

My client is requesting that a chart be filled out as a learner goes through a course, and that as a learner fills out a chart they can see if their answers are correct or incorrect after typing an answer, but before submitting all answers in the chart.

I've tried to implement instant feedback with layers (using this forum link), but the "blank" values do not register, and cause other layers to show when one answer is entered but another answer is missing.

Also further on in the course I need to have 7-10 or so text entry boxes so anything simplified would be helpful. 

 

Current ideas (but seem like a pain):

Program every possible interaction and combination of values interactions with their own layer to pop up after submission.

Or 

Try to program values in chronological order (but chart values are in random spots so chronological order makes no sense on a learners end when entering values in the chart as they could ideally be completed in any order.

Or

program each submission point with its own submit button that check that an entry matches selected input, and if all inputs are marked as true in a separate variable, a submission button could populate. Only issue is that this clutters up a very small chart massively.

Please let me know if there's any good solution to this!! 

Thanks,

M