JSFiddle - React, Tailwind, and code Playground

HTML

<input type="text" />
<input type="text" id="detect" />

JavaScript

$('#detect').on('focus', function(e){
    $(window).keyup(function (e) {
        var code = (e.keyCode ? e.keyCode : e.which);
        if (code == 9) {
            alert('I was tabbed!');
        }
    });
});