Merge pull request #9276 from fredj/graticule_cleanup

Use the constructor options instead of changing the private variables

src/ol/layer/Graticule.js

@@ -150,7 +150,11 @@ class Graticule extends VectorLayer {
   constructor(opt_options) {
     const options = opt_options ? opt_options : {};
 
-    const baseOptions = assign({}, options);
+    const baseOptions = assign({
+      updateWhileAnimating: true,
+      updateWhileInteracting: true,
+      renderBuffer: 0
+    }, options);
 
     delete baseOptions.maxLines;
     delete baseOptions.strokeStyle;
@@ -422,11 +426,6 @@ class Graticule extends VectorLayer {
 
     this.setRenderOrder(null);
 
-    this.renderBuffer_ = 0;
-
-    this.updateWhileAnimating_ = true;
-    this.updateWhileInteracting_ = true;
-
     this.tmpExtent_ = null;
   }