fix: return style in overrideStyleFunction

Author: d-koppenhagen

src/demos/AnimatedClusterDemo.vue

@@ -118,6 +118,7 @@ const overrideStyleFunction = (feature, style) => {
   style.getImage().setRadius(radius);
 
   style.getText().setText(size.toString());
+  return style;
 };
 
 const getRandomInRange = (from, to, fixed) => {

src/demos/AnimatedClusterDemo2.vue

@@ -105,6 +105,7 @@ const overrideStyleFunction = (feature, style) => {
   style.getImage().setRadius(radius);
 
   style.getText().setText(size.toString());
+  return style;
 };
 
 const getRandomInRange = (from, to, fixed) => {

src/demos/AppDemo.vue

@@ -355,6 +355,7 @@ const overrideStyleFunction = (feature, style) => {
   style.getImage().setRadius(radius);
 
   style.getText().setText(size.toString());
+  return style;
 };
 
 const selectInteactionFilter = (feature) => {

src/demos/ClusterDemo.vue

@@ -60,6 +60,7 @@ const overrideStyleFunction = (feature, style, resolution) => {
   const clusteredFeatures = feature.get("features");
   const size = clusteredFeatures.length;
   style.getText().setText(size.toString());
+  return style;
 };
 
 const getRandomInRange = (from, to, fixed) => {