JSFiddle - React, Tailwind, and code Playground

HTML

<script src="https://code.jquery.com/jquery-3.1.1.min.js"></script>
<div class="alert alert-success" style="display: none;">Успешно</div>

CSS

.alert-success {
  background: green;
  margin: 20px auto;
  padding: 20px;
  color: #fff;
  width: 200px;
}

JavaScript

$(document).ready(function() {
  $('.alert-success').show(0).delay(5000).hide(0);
});