JSFiddle - React, Tailwind, and code Playground

HTML

<script src="http://ajax.googleapis.com/ajax/libs/jqueryui/1.9.2/jquery-ui.min.js"></script>
<link rel="stylesheet" href="http://ajax.googleapis.com/ajax/libs/jqueryui/1.9.0/themes/base/jquery-ui.css">
<input type="text" id="input" />
<div id="dialog">Hej!</div>

CSS

input {
  margin: 1em;
}

JavaScript

$(function () {
  $("#dialog").dialog({
    autoOpen: false,
    modal: true
  });

  $("#input").on("blur", function () {
    $("#dialog").dialog("open");
  }).focus();
  
  $("#dialog").dialog("open");
});