download jquery.min.js for bootstrap 4 code example

Example 1: jquery cdn

<script src="https://code.jquery.com/jquery-3.5.1.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: bootstrap 4 cdn

<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0/css/bootstrap.min.css" integrity="sha384-Gn5384xqQ1aoWXA+058RXPxPg6fy4IWvTNh0E263XmFcJlSAwiGgFAW/dAiS6JXm" crossorigin="anonymous">