controls and interactions.

src/ol/control/FullScreen.js

@@ -80,6 +80,13 @@ class FullScreen extends Control {
       target: options.target,
     });
 
+    /***
+     * @type {import("../Observable").OnSignature<import("../Observable").EventTypes|
+     *     'enterfullscreen'|'leavefullscreen', import("../events/Event.js").default> &
+     *   import("../Observable").OnSignature<import("../ObjectEventType").Types, import("../Object").ObjectEvent>}
+     */
+    this.on;
+
     /**
      * @private
      * @type {string}

src/ol/control/MousePosition.js

@@ -68,6 +68,13 @@ class MousePosition extends Control {
       target: options.target,
     });
 
+    /***
+     * @type {import("../Observable").OnSignature<import("../Observable").EventTypes, import("../events/Event.js").default> &
+     *   import("../Observable").OnSignature<import("../ObjectEventType").Types|
+     *     'change:coordinateFormat'|'change:projection', import("../Object").ObjectEvent>}
+     */
+    this.on;
+
     this.addChangeListener(PROJECTION, this.handleProjectionChanged_);
 
     if (options.coordinateFormat) {

src/ol/control/ScaleLine.js

@@ -90,6 +90,13 @@ class ScaleLine extends Control {
       target: options.target,
     });
 
+    /***
+     * @type {import("../Observable").OnSignature<import("../Observable").EventTypes, import("../events/Event.js").default> &
+     *   import("../Observable").OnSignature<import("../ObjectEventType").Types|
+     *     'change:units', import("../Object").ObjectEvent>}
+     */
+    this.on;
+
     /**
      * @private
      * @type {HTMLElement}