fix(list): Fix for sticky titles in Chrome/Android. Currently broken

ionic/util/util.ts

@@ -180,3 +180,35 @@ export function getQuerystring(url, key) {
   }
   return queryParams;
 }
+
+/**
+ * Throttle the given fun, only allowing it to be
+ * called at most every `wait` ms.
+ */
+export function throttle(func, wait, options) {
+  var context, args, result;
+  var timeout = null;
+  var previous = 0;
+  options || (options = {});
+  var later = function() {
+    previous = options.leading === false ? 0 : Date.now();
+    timeout = null;
+    result = func.apply(context, args);
+  };
+  return function() {
+    var now = Date.now();
+    if (!previous && options.leading === false) previous = now;
+    var remaining = wait - (now - previous);
+    context = this;
+    args = arguments;
+    if (remaining <= 0) {
+      clearTimeout(timeout);
+      timeout = null;
+      previous = now;
+      result = func.apply(context, args);
+    } else if (!timeout && options.trailing !== false) {
+      timeout = setTimeout(later, remaining);
+    }
+    return result;
+  };
+}