Remove label style caches

src/ol/layer/Graticule.js

@@ -318,20 +318,10 @@ class Graticule extends VectorLayer {
         options.latLabelPosition;
 
       /**
-       * @type {Object.<string,Style>}
+       * @type {Style}
        * @private
        */
-      this.lonLabelStyleCache_ = {};
-
-      /**
-       * @private
-       * @param {import("../Feature").default} feature Feature
-       * @return {Style} style
-       */
-      this.lonLabelStyle_ = function(feature) {
-        const label = feature.get('graticule_label');
-        if (!this.lonLabelStyleCache_[label]) {
-          this.lonLabelStyleCache_[label] = new Style({
+      this.lonLabelStyleBase_ = new Style({
         text: options.lonLabelStyle !== undefined ? options.lonLabelStyle.clone() :
           new Text({
             font: '12px Calibri,sans-serif',
@@ -345,26 +335,23 @@ class Graticule extends VectorLayer {
             })
           })
       });
-          this.lonLabelStyleCache_[label].getText().setText(label);
-        }
-        return this.lonLabelStyleCache_[label];
-      }.bind(this);
-
-      /**
-       * @type {Object.<string,Style>}
-       * @private
-       */
-      this.latLabelStyleCache_ = {};
 
       /**
        * @private
        * @param {import("../Feature").default} feature Feature
        * @return {Style} style
        */
-      this.latLabelStyle_ = function(feature) {
+      this.lonLabelStyle_ = function(feature) {
         const label = feature.get('graticule_label');
-        if (!this.latLabelStyleCache_[label]) {
-          this.latLabelStyleCache_[label] = new Style({
+        this.lonLabelStyleBase_.getText().setText(label);
+        return this.lonLabelStyleBase_;
+      }.bind(this);
+
+      /**
+       * @type {Style}
+       * @private
+       */
+      this.latLabelStyleBase_ = new Style({
         text: options.latLabelStyle !== undefined ? options.latLabelStyle.clone() :
           new Text({
             font: '12px Calibri,sans-serif',
@@ -378,9 +365,16 @@ class Graticule extends VectorLayer {
             })
           })
       });
-          this.latLabelStyleCache_[label].getText().setText(label);
-        }
-        return this.latLabelStyleCache_[label];
+
+      /**
+       * @private
+       * @param {import("../Feature").default} feature Feature
+       * @return {Style} style
+       */
+      this.latLabelStyle_ = function(feature) {
+        const label = feature.get('graticule_label');
+        this.latLabelStyleBase_.getText().setText(label);
+        return this.latLabelStyleBase_;
       }.bind(this);
 
       this.meridiansLabels_ = [];