From 1870a649843ae61e4643ffabb0771d48ca56d53a Mon Sep 17 00:00:00 2001
From: Simon Seyock <seyock@terrestris.de>
Date: Wed, 23 Jun 2021 17:29:33 +0200
Subject: [PATCH] Add `CombinedOnSignature`.

---
 src/ol/Collection.js              |  3 ++-
 src/ol/Feature.js                 |  3 ++-
 src/ol/Geolocation.js             | 14 ++++++++++----
 src/ol/Object.js                  |  3 ++-
 src/ol/Observable.js              |  2 +-
 src/ol/Overlay.js                 |  9 +++++++--
 src/ol/PluggableMap.js            | 11 ++++++++---
 src/ol/View.js                    |  8 ++++++--
 src/ol/control/FullScreen.js      |  4 +++-
 src/ol/control/MousePosition.js   |  4 +++-
 src/ol/control/ScaleLine.js       |  3 ++-
 src/ol/interaction/DragBox.js     |  4 +++-
 src/ol/interaction/Draw.js        |  4 +++-
 src/ol/interaction/Extent.js      |  4 +++-
 src/ol/interaction/Interaction.js |  3 ++-
 src/ol/interaction/Modify.js      |  4 +++-
 src/ol/interaction/Select.js      |  4 +++-
 src/ol/interaction/Translate.js   |  4 +++-
 src/ol/layer/Base.js              |  3 ++-
 src/ol/layer/BaseTile.js          |  4 +++-
 src/ol/layer/Layer.js             |  4 +++-
 src/ol/layer/VectorTile.js        |  4 +++-
 src/ol/source/Image.js            |  3 ++-
 src/ol/source/Tile.js             |  4 +++-
 src/ol/source/Vector.js           |  4 +++-
 25 files changed, 85 insertions(+), 32 deletions(-)

diff --git a/src/ol/Collection.js b/src/ol/Collection.js
index 5b01dfb1a7..194b6d321b 100644
--- a/src/ol/Collection.js
+++ b/src/ol/Collection.js
@@ -74,7 +74,8 @@ class Collection extends BaseObject {
     /***
      * @type {import("./Observable").OnSignature<import("./Observable").EventTypes, import("./events/Event.js").default> &
      *   import("./Observable").OnSignature<import("./ObjectEventType").Types|'change:length', import("./Object").ObjectEvent> &
-     *   import("./Observable").OnSignature<'add'|'remove', CollectionEvent>}
+     *   import("./Observable").OnSignature<'add'|'remove', CollectionEvent> &
+     *   import("./Observable").CombinedOnSignature<import("./Observable").EventTypes|import("./ObjectEventType").Types|'change:length'|'add'|'remove'>}
      */
     this.on;
 
diff --git a/src/ol/Feature.js b/src/ol/Feature.js
index b56ab71ca7..281b8a45df 100644
--- a/src/ol/Feature.js
+++ b/src/ol/Feature.js
@@ -71,7 +71,8 @@ class Feature extends BaseObject {
 
     /***
      * @type {import("./Observable").OnSignature<import("./Observable").EventTypes, import("./events/Event.js").default> &
-     *   import("./Observable").OnSignature<import("./ObjectEventType").Types|'change:geometry', import("./Object").ObjectEvent>}
+     *   import("./Observable").OnSignature<import("./ObjectEventType").Types|'change:geometry', import("./Object").ObjectEvent> &
+     *   import("./Observable").CombinedOnSignature<import("./Observable").EventTypes|import("./ObjectEventType").Types|'change:geometry'>}
      */
     this.on;
 
diff --git a/src/ol/Geolocation.js b/src/ol/Geolocation.js
index 470a6362e7..3f497fae2c 100644
--- a/src/ol/Geolocation.js
+++ b/src/ol/Geolocation.js
@@ -61,6 +61,12 @@ class GeolocationError extends BaseEvent {
  * is reported in.
  */
 
+/**
+ * @typedef {import("./ObjectEventType").Types|'change:accuracy'|'change:accuracyGeometry'|'change:altitude'|
+ *    'change:altitudeAccuracy'|'change:heading'|'change:position'|'change:projection'|'change:speed'|'change:tracking'|
+ *    'change:trackingOptions'} GeolocationObjectEventTypes
+ */
+
 /**
  * @classdesc
  * Helper class for providing HTML5 Geolocation capabilities.
@@ -92,10 +98,10 @@ class Geolocation extends BaseObject {
     super();
 
     /***
-     * @type {import("./Observable").OnSignature<import("./ObjectEventType").Types|
-     *     'change:accuracy'|'change:accuracyGeometry'|'change:altitude'|'change:altitudeAccuracy'|'change:heading'|
-     *     'change:position'|'change:projection'|'change:speed'|'change:tracking'|'change:trackingOptions', import("./Object").ObjectEvent> &
-     *   import("./Observable").OnSignature<'error', GeolocationError>}
+     * @type {import("./Observable").OnSignature<import("./Observable").EventTypes, import("./events/Event.js").default> &
+     *   import("./Observable").OnSignature<GeolocationObjectEventTypes, import("./Object").ObjectEvent> &
+     *   import("./Observable").OnSignature<'error', GeolocationError> &
+     *   import("./Observable").CombinedOnSignature<import("./Observable").EventTypes|GeolocationObjectEventTypes|'error'>}
      */
     this.on;
 
diff --git a/src/ol/Object.js b/src/ol/Object.js
index 72113a10c0..59946fcf0e 100644
--- a/src/ol/Object.js
+++ b/src/ol/Object.js
@@ -89,7 +89,8 @@ class BaseObject extends Observable {
 
     /***
      * @type {import("./Observable").OnSignature<import("./Observable").EventTypes, import("./events/Event.js").default> &
-     *    import("./Observable").OnSignature<import("./ObjectEventType").Types, ObjectEvent>}
+     *    import("./Observable").OnSignature<import("./ObjectEventType").Types, ObjectEvent> &
+     *    import("./Observable").CombinedOnSignature<import("./Observable").EventTypes|import("./ObjectEventType").Types>}
      */
     this.on;
 
diff --git a/src/ol/Observable.js b/src/ol/Observable.js
index a95197e441..01a8cc5fa4 100644
--- a/src/ol/Observable.js
+++ b/src/ol/Observable.js
@@ -7,7 +7,7 @@ import {listen, listenOnce, unlistenByKey} from './events.js';
 
 /***
  * @template {string} Type
- * @template {import("./events/Event.js").default} EventClass
+ * @template {Event|import("./events/Event.js").default} EventClass
  * @typedef {(type: Type|Type[], listener: (event: EventClass) => (void|boolean)) => import("./events").EventsKey|Array<import("./events").EventsKey>} OnSignature
  */
 
diff --git a/src/ol/Overlay.js b/src/ol/Overlay.js
index 50a0c3b51d..5e9bb5fa17 100644
--- a/src/ol/Overlay.js
+++ b/src/ol/Overlay.js
@@ -83,6 +83,11 @@ const Property = {
   POSITIONING: 'positioning',
 };
 
+/**
+ * @typedef {import("./ObjectEventType").Types|'change:element'|'change:map'|'change:offset'|'change:position'|
+ *   'change:positioning'} OverlayObjectEventTypes
+ */
+
 /**
  * @classdesc
  * An element to be displayed over the map and attached to a single map
@@ -112,8 +117,8 @@ class Overlay extends BaseObject {
 
     /***
      * @type {import("./Observable").OnSignature<import("./Observable").EventTypes, import("./events/Event.js").default> &
-     *   import("./Observable").OnSignature<import("./ObjectEventType").Types|
-     *     'change:element'|'change:map'|'change:offset'|'change:position'|'change:positioning', import("./Object").ObjectEvent>}
+     *   import("./Observable").OnSignature<OverlayObjectEventTypes, import("./Object").ObjectEvent> &
+     *   import("./Observable").CombinedOnSignature<import("./Observable").EventTypes|OverlayObjectEventTypes>}
      */
     this.on;
 
diff --git a/src/ol/PluggableMap.js b/src/ol/PluggableMap.js
index ba99bf7cf7..12a55626b4 100644
--- a/src/ol/PluggableMap.js
+++ b/src/ol/PluggableMap.js
@@ -86,6 +86,10 @@ import {removeNode} from './dom.js';
  * @property {Object<string, *>} values Values.
  */
 
+/**
+ * @typedef {import("./ObjectEventType").Types|'change:layergroup'|'change:size'|'change:target'|'change:view'} MapObjectEventTypes
+ */
+
 /**
  * Object literal with config options for the map.
  * @typedef {Object} MapOptions
@@ -138,11 +142,12 @@ class PluggableMap extends BaseObject {
 
     /***
      * @type {import("./Observable").OnSignature<import("./Observable").EventTypes, import("./events/Event.js").default> &
-     *    import("./Observable").OnSignature<import("./ObjectEventType").Types|
-     *      'change:layergroup'|'change:size'|'change:target'|'change:view', import("./Object").ObjectEvent> &
+     *    import("./Observable").OnSignature<MapObjectEventTypes, import("./Object").ObjectEvent> &
      *    import("./Observable").OnSignature<import("./MapBrowserEventType").Types, import("./MapBrowserEvent").default> &
      *    import("./Observable").OnSignature<import("./MapEventType").Types, import("./MapEvent").default> &
-     *    import("./Observable").OnSignature<import("./render/EventType").MapRenderEventTypes, import("./render/Event").default>}
+     *    import("./Observable").OnSignature<import("./render/EventType").MapRenderEventTypes, import("./render/Event").default> &
+     *    import("./Observable").CombinedOnSignature<import("./Observable").EventTypes|MapObjectEventTypes|
+     *      import("./MapBrowserEventType").Types|import("./MapEventType").Types|import("./render/EventType").MapRenderEventTypes>}
      */
     this.on;
 
diff --git a/src/ol/View.js b/src/ol/View.js
index 5d60eb1f52..ca538080de 100644
--- a/src/ol/View.js
+++ b/src/ol/View.js
@@ -218,6 +218,10 @@ import {fromExtent as polygonFromExtent} from './geom/Polygon.js';
  */
 const DEFAULT_MIN_ZOOM = 0;
 
+/**
+ * @typedef {import("./ObjectEventType").Types|'change:center'|'change:resolution'|'change:rotation'} ViewObjectEventTypes
+ */
+
 /**
  * @classdesc
  * A View object represents a simple 2D view of the map.
@@ -299,8 +303,8 @@ class View extends BaseObject {
 
     /***
      * @type {import("./Observable").OnSignature<import("./Observable").EventTypes, import("./events/Event.js").default> &
-     *   import("./Observable").OnSignature<import("./ObjectEventType").Types|
-     *     'change:center'|'change:resolution'|'change:rotation', import("./Object").ObjectEvent>}
+     *   import("./Observable").OnSignature<ViewObjectEventTypes, import("./Object").ObjectEvent> &
+     *   import("./Observable").CombinedOnSignature<import("./Observable").EventTypes|ViewObjectEventTypes>}
      */
     this.on;
 
diff --git a/src/ol/control/FullScreen.js b/src/ol/control/FullScreen.js
index ec61dadc56..69f6626c6b 100644
--- a/src/ol/control/FullScreen.js
+++ b/src/ol/control/FullScreen.js
@@ -83,7 +83,9 @@ class FullScreen extends Control {
     /***
      * @type {import("../Observable").OnSignature<import("../Observable").EventTypes|
      *     'enterfullscreen'|'leavefullscreen', import("../events/Event.js").default> &
-     *   import("../Observable").OnSignature<import("../ObjectEventType").Types, import("../Object").ObjectEvent>}
+     *   import("../Observable").OnSignature<import("../ObjectEventType").Types, import("../Object").ObjectEvent> &
+     *   import("../Observable").CombinedOnSignature<import("../Observable").EventTypes|
+     *     'enterfullscreen'|'leavefullscreen'|import("../ObjectEventType").Types>}
      */
     this.on;
 
diff --git a/src/ol/control/MousePosition.js b/src/ol/control/MousePosition.js
index 6da0741a9c..9e059730a2 100644
--- a/src/ol/control/MousePosition.js
+++ b/src/ol/control/MousePosition.js
@@ -71,7 +71,9 @@ class MousePosition extends Control {
     /***
      * @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>}
+     *     'change:coordinateFormat'|'change:projection', import("../Object").ObjectEvent> &
+     *   import("../Observable").CombinedOnSignature<import("../Observable").EventTypes|import("../ObjectEventType").Types|
+     *     'change:coordinateFormat'|'change:projection'>}
      */
     this.on;
 
diff --git a/src/ol/control/ScaleLine.js b/src/ol/control/ScaleLine.js
index 151ee230db..500824ebfd 100644
--- a/src/ol/control/ScaleLine.js
+++ b/src/ol/control/ScaleLine.js
@@ -93,7 +93,8 @@ class ScaleLine extends Control {
     /***
      * @type {import("../Observable").OnSignature<import("../Observable").EventTypes, import("../events/Event.js").default> &
      *   import("../Observable").OnSignature<import("../ObjectEventType").Types|
-     *     'change:units', import("../Object").ObjectEvent>}
+     *     'change:units', import("../Object").ObjectEvent> &
+     *   import("../Observable").CombinedOnSignature<import("../Observable").EventTypes|import("../ObjectEventType").Types|'change:units'>}
      */
     this.on;
 
diff --git a/src/ol/interaction/DragBox.js b/src/ol/interaction/DragBox.js
index 1b758a27cc..f4d9448741 100644
--- a/src/ol/interaction/DragBox.js
+++ b/src/ol/interaction/DragBox.js
@@ -116,7 +116,9 @@ class DragBox extends PointerInteraction {
      * @type {import("../Observable").OnSignature<import("../Observable").EventTypes, import("../events/Event.js").default> &
      *   import("../Observable").OnSignature<import("../ObjectEventType").Types|
      *     'change:active', import("../Object").ObjectEvent> &
-     *   import("../Observable").OnSignature<'boxcancel'|'boxdrag'|'boxend', DragBoxEvent>}
+     *   import("../Observable").OnSignature<'boxcancel'|'boxdrag'|'boxend', DragBoxEvent> &
+     *   import("../Observable").CombinedOnSignature<import("../Observable").EventTypes|import("../ObjectEventType").Types|
+     *     'change:active'|'boxcancel'|'boxdrag'|'boxend'>}
      */
     this.on;
 
diff --git a/src/ol/interaction/Draw.js b/src/ol/interaction/Draw.js
index 81e9ec4a4e..efff5a60b7 100644
--- a/src/ol/interaction/Draw.js
+++ b/src/ol/interaction/Draw.js
@@ -197,7 +197,9 @@ class Draw extends PointerInteraction {
      * @type {import("../Observable").OnSignature<import("../Observable").EventTypes, import("../events/Event.js").default> &
      *   import("../Observable").OnSignature<import("../ObjectEventType").Types|
      *     'change:active', import("../Object").ObjectEvent> &
-     *   import("../Observable").OnSignature<'drawabort'|'drawend'|'drawstart', DrawEvent>}
+     *   import("../Observable").OnSignature<'drawabort'|'drawend'|'drawstart', DrawEvent> &
+     *   import("../Observable").CombinedOnSignature<import("../Observable").EventTypes|import("../ObjectEventType").Types|
+     *     'change:active'|'drawabort'|'drawend'|'drawstart'>}
      */
     this.on;
 
diff --git a/src/ol/interaction/Extent.js b/src/ol/interaction/Extent.js
index 1b7301e360..12bfa3f48c 100644
--- a/src/ol/interaction/Extent.js
+++ b/src/ol/interaction/Extent.js
@@ -96,7 +96,9 @@ class Extent extends PointerInteraction {
      * @type {import("../Observable").OnSignature<import("../Observable").EventTypes, import("../events/Event.js").default> &
      *   import("../Observable").OnSignature<import("../ObjectEventType").Types|
      *     'change:active', import("../Object").ObjectEvent> &
-     *   import("../Observable").OnSignature<'extentchanged', ExtentEvent>}
+     *   import("../Observable").OnSignature<'extentchanged', ExtentEvent> &
+     *   import("../Observable").CombinedOnSignature<import("../Observable").EventTypes|import("../ObjectEventType").Types|
+     *     'change:active'|'extentchanged'>}
      */
     this.on;
 
diff --git a/src/ol/interaction/Interaction.js b/src/ol/interaction/Interaction.js
index caaa0c22b8..14018d73ee 100644
--- a/src/ol/interaction/Interaction.js
+++ b/src/ol/interaction/Interaction.js
@@ -39,7 +39,8 @@ class Interaction extends BaseObject {
     /***
      * @type {import("../Observable").OnSignature<import("../Observable").EventTypes, import("../events/Event.js").default> &
      *   import("../Observable").OnSignature<import("../ObjectEventType").Types|
-     *     'change:active', import("../Object").ObjectEvent>}
+     *     'change:active', import("../Object").ObjectEvent> &
+     *   import("../Observable").CombinedOnSignature<import("../Observable").EventTypes|import("../ObjectEventType").Types|'change:active'>}
      */
     this.on;
 
diff --git a/src/ol/interaction/Modify.js b/src/ol/interaction/Modify.js
index 8a5239e504..ae2f25890c 100644
--- a/src/ol/interaction/Modify.js
+++ b/src/ol/interaction/Modify.js
@@ -196,7 +196,9 @@ class Modify extends PointerInteraction {
      * @type {import("../Observable").OnSignature<import("../Observable").EventTypes, import("../events/Event.js").default> &
      *   import("../Observable").OnSignature<import("../ObjectEventType").Types|
      *     'change:active', import("../Object").ObjectEvent> &
-     *   import("../Observable").OnSignature<'modifyend'|'modifystart', ModifyEvent>}
+     *   import("../Observable").OnSignature<'modifyend'|'modifystart', ModifyEvent> &
+     *   import("../Observable").CombinedOnSignature<import("../Observable").EventTypes|import("../ObjectEventType").Types|
+     *     'change:active'|'modifyend'|'modifystart'>}
      */
     this.on;
 
diff --git a/src/ol/interaction/Select.js b/src/ol/interaction/Select.js
index 77ef66c194..2b08c999f8 100644
--- a/src/ol/interaction/Select.js
+++ b/src/ol/interaction/Select.js
@@ -160,7 +160,9 @@ class Select extends Interaction {
      * @type {import("../Observable").OnSignature<import("../Observable").EventTypes, import("../events/Event.js").default> &
      *   import("../Observable").OnSignature<import("../ObjectEventType").Types|
      *     'change:active', import("../Object").ObjectEvent> &
-     *   import("../Observable").OnSignature<'select', SelectEvent>}
+     *   import("../Observable").OnSignature<'select', SelectEvent> &
+     *   import("../Observable").CombinedOnSignature<import("../Observable").EventTypes|import("../ObjectEventType").Types|
+     *     'change:active'|'select'>}
      */
     this.on;
 
diff --git a/src/ol/interaction/Translate.js b/src/ol/interaction/Translate.js
index 9df11cb02d..ae24550198 100644
--- a/src/ol/interaction/Translate.js
+++ b/src/ol/interaction/Translate.js
@@ -130,7 +130,9 @@ class Translate extends PointerInteraction {
      * @type {import("../Observable").OnSignature<import("../Observable").EventTypes, import("../events/Event.js").default> &
      *   import("../Observable").OnSignature<import("../ObjectEventType").Types|
      *     'change:active', import("../Object").ObjectEvent> &
-     *   import("../Observable").OnSignature<'translateend'|'translatestart'|'translating', TranslateEvent>}
+     *   import("../Observable").OnSignature<'translateend'|'translatestart'|'translating', TranslateEvent> &
+     *   import("../Observable").CombinedOnSignature<import("../Observable").EventTypes|import("../ObjectEventType").Types|
+     *     'change:active'|'translateend'|'translatestart'|'translating'>}
      */
     this.on;
 
diff --git a/src/ol/layer/Base.js b/src/ol/layer/Base.js
index c04d585552..0cb6b4c5aa 100644
--- a/src/ol/layer/Base.js
+++ b/src/ol/layer/Base.js
@@ -54,7 +54,8 @@ class BaseLayer extends BaseObject {
 
     /***
      * @type {import("../Observable").OnSignature<import("../Observable").EventTypes, import("../events/Event.js").default> &
-     *   import("../Observable").OnSignature<BaseLayerObjectEventTypes, import("../Object").ObjectEvent>}
+     *   import("../Observable").OnSignature<BaseLayerObjectEventTypes, import("../Object").ObjectEvent> &
+     *   import("../Observable").CombinedOnSignature<import("../Observable").EventTypes|BaseLayerObjectEventTypes>}
      */
     this.on;
 
diff --git a/src/ol/layer/BaseTile.js b/src/ol/layer/BaseTile.js
index ed0e238e7d..2ce0b5ca1a 100644
--- a/src/ol/layer/BaseTile.js
+++ b/src/ol/layer/BaseTile.js
@@ -65,7 +65,9 @@ class BaseTileLayer extends Layer {
      * @type {import("../Observable").OnSignature<import("../Observable").EventTypes, import("../events/Event.js").default> &
      *   import("../Observable").OnSignature<import("./Base").BaseLayerObjectEventTypes|
      *     'change:source'|'change:preload'|'change:useInterimTilesOnError', import("../Object").ObjectEvent> &
-     *   import("../Observable").OnSignature<import("../render/EventType").LayerRenderEventTypes, import("../render/Event").default>}
+     *   import("../Observable").OnSignature<import("../render/EventType").LayerRenderEventTypes, import("../render/Event").default> &
+     *   import("../Observable").CombinedOnSignature<import("../Observable").EventTypes|import("./Base").BaseLayerObjectEventTypes|
+     *   'change:source'|'change:preload'|'change:useInterimTilesOnError'|import("../render/EventType").LayerRenderEventTypes>}
      */
     this.on;
 
diff --git a/src/ol/layer/Layer.js b/src/ol/layer/Layer.js
index 3b3c4d89dc..0b2ae86643 100644
--- a/src/ol/layer/Layer.js
+++ b/src/ol/layer/Layer.js
@@ -100,7 +100,9 @@ class Layer extends BaseLayer {
      * @type {import("../Observable").OnSignature<import("../Observable").EventTypes, import("../events/Event.js").default> &
      *   import("../Observable").OnSignature<import("./Base").BaseLayerObjectEventTypes|
      *     'change:source', import("../Object").ObjectEvent> &
-     *   import("../Observable").OnSignature<import("../render/EventType").LayerRenderEventTypes, import("../render/Event").default>}
+     *   import("../Observable").OnSignature<import("../render/EventType").LayerRenderEventTypes, import("../render/Event").default> &
+     *   import("../Observable").CombinedOnSignature<import("../Observable").EventTypes|import("./Base").BaseLayerObjectEventTypes|'change:source'|
+     *     import("../render/EventType").LayerRenderEventTypes>}
      */
     this.on;
 
diff --git a/src/ol/layer/VectorTile.js b/src/ol/layer/VectorTile.js
index cbb0827623..e0e9f9a2e7 100644
--- a/src/ol/layer/VectorTile.js
+++ b/src/ol/layer/VectorTile.js
@@ -99,7 +99,9 @@ class VectorTileLayer extends BaseVectorLayer {
      * @type {import("../Observable").OnSignature<import("../Observable").EventTypes, import("../events/Event.js").default> &
      *   import("../Observable").OnSignature<import("./Base").BaseLayerObjectEventTypes|
      *     'change:source'|'change:preload'|'change:useInterimTilesOnError', import("../Object").ObjectEvent> &
-     *   import("../Observable").OnSignature<import("../render/EventType").LayerRenderEventTypes, import("../render/Event").default>}
+     *   import("../Observable").OnSignature<import("../render/EventType").LayerRenderEventTypes, import("../render/Event").default> &
+     *   import("../Observable").CombinedOnSignature<import("../Observable").EventTypes|import("./Base").BaseLayerObjectEventTypes|
+     *     'change:source'|'change:preload'|'change:useInterimTilesOnError'|import("../render/EventType").LayerRenderEventTypes>}
      */
     this.on;
 
diff --git a/src/ol/source/Image.js b/src/ol/source/Image.js
index aa032d1a96..354baa9638 100644
--- a/src/ol/source/Image.js
+++ b/src/ol/source/Image.js
@@ -96,7 +96,8 @@ class ImageSource extends Source {
     /***
      * @type {import("../Observable").OnSignature<import("../Observable").EventTypes, import("../events/Event.js").default> &
      *   import("../Observable").OnSignature<import("../ObjectEventType").Types, import("../Object").ObjectEvent> &
-     *   import("../Observable").OnSignature<ImageSourceEventTypes, ImageSourceEvent>}
+     *   import("../Observable").OnSignature<ImageSourceEventTypes, ImageSourceEvent> &
+     *   import("../Observable").CombinedOnSignature<import("../Observable").EventTypes|import("../ObjectEventType").Types|ImageSourceEventTypes>}
      */
     this.on;
 
diff --git a/src/ol/source/Tile.js b/src/ol/source/Tile.js
index 330c4929e9..868aa61b65 100644
--- a/src/ol/source/Tile.js
+++ b/src/ol/source/Tile.js
@@ -55,7 +55,9 @@ class TileSource extends Source {
     /***
      * @type {import("../Observable").OnSignature<import("../Observable").EventTypes, import("../events/Event.js").default> &
      *   import("../Observable").OnSignature<import("../ObjectEventType").Types, import("../Object").ObjectEvent> &
-     *   import("../Observable").OnSignature<import("./TileEventType").TileSourceEventTypes, TileSourceEvent>}
+     *   import("../Observable").OnSignature<import("./TileEventType").TileSourceEventTypes, TileSourceEvent> &
+     *   import("../Observable").CombinedOnSignature<import("../Observable").EventTypes|import("../ObjectEventType").Types|
+     *     import("./TileEventType").TileSourceEventTypes>}
      */
     this.on;
 
diff --git a/src/ol/source/Vector.js b/src/ol/source/Vector.js
index 7172ad102a..346c459730 100644
--- a/src/ol/source/Vector.js
+++ b/src/ol/source/Vector.js
@@ -180,7 +180,9 @@ class VectorSource extends Source {
     /***
      * @type {import("../Observable").OnSignature<import("../Observable").EventTypes, import("../events/Event.js").default> &
      *   import("../Observable").OnSignature<import("../ObjectEventType").Types, import("../Object").ObjectEvent> &
-     *   import("../Observable").OnSignature<import("./VectorEventType").VectorSourceEventTypes, VectorSourceEvent>}
+     *   import("../Observable").OnSignature<import("./VectorEventType").VectorSourceEventTypes, VectorSourceEvent> &
+     *   import("../Observable").CombinedOnSignature<import("../Observable").EventTypes|import("../ObjectEventType").Types|
+     *     import("./VectorEventType").VectorSourceEventTypes>}
      */
     this.on;