Add basic click handler

public/assets/enhancements.js

@@ -49,6 +49,15 @@
       div.innerHTML = xhr.responseText;
       var heartEl = div.firstChild;
 
+      // Add click handler
+      heartEl.addEventListener('click', function(e) {
+        if(heartEl.classList.contains('hearted')) {
+          heartEl.classList.remove('hearted');
+        } else {
+          heartEl.classList.add('hearted');
+        }
+      });
+
       // Inject heart into DOM
       DOMReady(function() {
         var titleEl = document.querySelector('h2.node-title');

public/assets/style.css

@@ -196,6 +196,9 @@ table i {
 .node-title .heart:hover {
   fill: rgba(255, 255, 255, 0.25);
 }
+.node-title .heart.hearted {
+  fill: #fff;
+}
 
 .status {
   float: right;