You might want to start by checking out one of my other answers and see the sample code. It is a way to listen for keyboard events. It comes down to the following code:
$(document).keydown(function(e) { if (e.keyCode == 37) {
Remember that for the sample response to the keys, the "Result" area on jsfiddle must be selected.
Personally, for a tooltip, I would use the usual one to better control it. How to do this, for example, is presented in this answer .
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