JSFiddle - React, Tailwind, and code Playground

HTML

<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.12.4/jquery.min.js"></script>
<input id="login" type="text" size="50"><br><br>
<input id="submit" type="submit" size="50" value="Submit">

JavaScript

var mc;

 
$('#login').on('focusout', function() {
  var mc = $('#login').val();
  //alert(mc)
});
 
$("#submit").on('mouseover', function() {
		alert(mc) 	
})