Use imports for enum types

src/ol/Overlay.js

@@ -21,7 +21,7 @@ import {outerHeight, outerWidth, removeChildren, removeNode} from './dom.js';
  * shifts the overlay down.
  * @property {import("./coordinate.js").Coordinate} [position] The overlay position
  * in map projection.
- * @property {OverlayPositioning} [positioning='top-left'] Defines how
+ * @property {import("./OverlayPositioning.js").default} [positioning='top-left'] Defines how
  * the overlay is actually positioned with respect to its `position` property.
  * Possible values are `'bottom-left'`, `'bottom-center'`, `'bottom-right'`,
  * `'center-left'`, `'center-center'`, `'center-right'`, `'top-left'`,
@@ -204,7 +204,7 @@ class Overlay extends BaseObject {
 
     this.setPositioning(
       options.positioning !== undefined
-        ? /** @type {OverlayPositioning} */ (options.positioning)
+        ? /** @type {import("./OverlayPositioning.js").default} */ (options.positioning)
         : OverlayPositioning.TOP_LEFT
     );
 
@@ -270,13 +270,13 @@ class Overlay extends BaseObject {
 
   /**
    * Get the current positioning of this overlay.
-   * @return {OverlayPositioning} How the overlay is positioned
+   * @return {import("./OverlayPositioning.js").default} How the overlay is positioned
    *     relative to its point on the map.
    * @observable
    * @api
    */
   getPositioning() {
-    return /** @type {OverlayPositioning} */ (this.get(Property.POSITIONING));
+    return /** @type {import("./OverlayPositioning.js").default} */ (this.get(Property.POSITIONING));
   }
 
   /**
@@ -481,7 +481,7 @@ class Overlay extends BaseObject {
 
   /**
    * Set the positioning for this overlay.
-   * @param {OverlayPositioning} positioning how the overlay is
+   * @param {import("./OverlayPositioning.js").default} positioning how the overlay is
    *     positioned relative to its point on the map.
    * @observable
    * @api