split out helper functions from button.js

ui/static/ui/button.js

@@ -1,23 +1,8 @@
-function getCookie(name) {
-    var cookieValue = null;
-    if (document.cookie && document.cookie !== '') {
-        var cookies = document.cookie.split(';');
-        for (var i = 0; i < cookies.length; i++) {
-            var cookie = cookies[i].trim();
-            // Does this cookie string begin with the name we want?
-            if (cookie.substring(0, name.length + 1) === (name + '=')) {
-                cookieValue = decodeURIComponent(cookie.substring(name.length + 1));
-                break;
-            }
-        }
-    }
-    return cookieValue;
-}
-
-var csrftoken = getCookie('csrftoken');
-var button = document.getElementById("BUTTON");
-var count = document.getElementById("COUNT");
+const csrftoken = getCookie('csrftoken');
+const button = document.getElementById("BUTTON");
+const count = document.getElementById("COUNT");
 
+// when button is clicked submit an empty post request
 button.addEventListener("click", event => {
     button.disabled = true;
     button.classList.add("is-loading");
@@ -39,4 +24,5 @@ button.addEventListener("click", event => {
         });
 });
 
+// when the page is loaded automatically select the button
 button.focus();

ui/static/ui/helper.js

@@ -0,0 +1,16 @@
+// get cookies when fetching with django
+function getCookie(name) {
+    var cookieValue = null;
+    if (document.cookie && document.cookie !== '') {
+        var cookies = document.cookie.split(';');
+        for (var i = 0; i < cookies.length; i++) {
+            var cookie = cookies[i].trim();
+            // Does this cookie string begin with the name we want?
+            if (cookie.substring(0, name.length + 1) === (name + '=')) {
+                cookieValue = decodeURIComponent(cookie.substring(name.length + 1));
+                break;
+            }
+        }
+    }
+    return cookieValue;
+}

ui/templates/ui/button.html

@@ -7,10 +7,10 @@
 {% endblock %}
 
 {% block js %}
+<script src="{% static 'ui/helper.js' %}"></script>
 <script src="{% static 'ui/button.js' %}"></script>
 {% endblock %}
 
-
 {% block body %}
 <section class="section">
     <div class="container">