<html>

<body>

  <h1>Welcome to HowToDoInJava.com</h1>

  <p class="intro">My name is Lokesh</p>
  <p>I live in India.</p>

  <p>Who is your favourite:</p>

  <ul id="choose">
    <li>Apple</li>
    <li>Mango</li>
    <li>Grapes</li>
  </ul>
</body>

</html>
$(document).ready(function(){
    $("*").css("border", "1px solid black");
});

External CSS

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External JavaScript

  1. https://cdnjs.cloudflare.com/ajax/libs/jquery/2.1.3/jquery.min.js