diff --git a/coffee_scale/static/js/coffee.js b/coffee_scale/static/js/coffee.js
index 20744cc..025387d 100644
--- a/coffee_scale/static/js/coffee.js
+++ b/coffee_scale/static/js/coffee.js
@@ -36,13 +36,14 @@ function onConnect() {
 // data update and parse functions
 function parseCups(ev){
     var cups = parseFloat(ev.detail).toFixed(1)
-    if (String(cups) !== '-1.0') {
-        var cupsEvent = new CustomEvent("cupsChanged", {'detail': cups});
-        window.dispatchEvent(cupsEvent);
-    } else {
-        var cupsEvent = new CustomEvent("cupsError", {'detail': 'Error: unable to fetch cups :('});
-        window.dispatchEvent(cupsEvent);
+
+    function makeEvent(cups) {
+        return (String(cups) !== '-1.0')
+            ? new CustomEvent("cupsChanged", {'detail': cups})
+            : new CustomEvent("cupsError", {'detail': 'Error: unable to fetch cups :('});
     }
+    
+    window.dispatchEvent(makeEvent(cups));
 }
 function updateCups(ev){
     $("#text").text(ev.detail);