fix: timeline

Author: sjhoeksma

src/vendors/Geo.jsx

@@ -492,20 +492,22 @@ function Geo(props) {
       if (featureEnabled('menu')) olMap.addControl(toggle);
 
       if (featureEnabled('timeline')) {
+        const timelineDate = function (layer) {
+          const ex = layer.get("extra")
+          if (ex) return ex.timelineDate
+          return ""
+        }
+
         //From layers get all histroy
         var histo = []
         props.layers.forEach((layer) => {
-          if (layer.type && layer.date && (
-            (Array.isArray(layer.get("groups")) && layer.get("groups").includes('history')) ||
-            (typeof layer.get("groups") === "string" && layer.get("groups") == 'history'))) {
+          if (layer.get("groups") && timelineDate(layer) && (
+            (Array.isArray(layer.get("groups")) && layer.get("groups").includes('timeline')) ||
+            (typeof layer.get("groups") === "string" && layer.get("groups") == 'timeline'))) {
             histo.push[layer]
           }
         })
-        const timelineDate = function (layer) {
-          const ex = layer.get("extra")
-          if (ex) return ex.timelineDate
-          return ""
-        }
+
         //Timeline
         var tline = new Timeline({
           className: 'ol-pointer ol-zoomhover ol-timeline',