We see in the following, on line (1), that we import the jQuery library that is contained in the static folder:
<!-- chapter03/templates/index_api_client.html -->
<!DOCTYPE html>
<html>
<head>
<title>Flask Restful API Example</title>
<script src="/static/jquery.min.js"></script> <!--(1)-->
<script type="text/javascript">
Next, we will start to cover the JavaScript functions in the file.