JSFiddle - React, Tailwind, and code Playground

HTML

<input type="text" value="" data-last="" class="1" tabindex="1"><br /><br />
<input type="text" value="" data-last="" class="2" tabindex="2"><br /><br />
<input type="text" value="" data-last="" class="3" tabindex="3"><br /><br />
<input type="text" value="" data-last="" class="4" tabindex="4">

JavaScript

$("input.4").keydown(function(){
    $("input.1").focusIn();
    alert("Клавиша нажата");
  });