installing jquery on window code example
Example 1: install jquery
<script type="text/javascript" src="http://code.jquery.com/jquery-latest.min.js"></script>
Example 2: jquery cdn
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.4.1/jquery.min.js"></script>
Example 3: installing jquery on window
<script type="text/javascript" src="http://code.jquery.com/jquery-latest.min.js"></script>