add button function

app/templates/app/detail_materi.html

@@ -3,6 +3,7 @@
 
 {% block header %}
 <link rel="stylesheet" type="text/css" href="{% static 'app/css/detail_materi.css' %}">
+<script src="{% static 'app/js/detail_materi.js' %}"></script>
 <link href="https://fonts.googleapis.com/css2?family=Poppins:ital,wght@0,400;0,500;1,100&display=swap" rel="stylesheet">
 {% endblock header %}