Use generics to limit event types in on(), once() and un()

src/ol/layer/Base.js

@@ -38,6 +38,8 @@ import {clamp} from '../math.js';
  * the options is set as a {@link module:ol/Object} property on the layer object, so
  * is observable, and has get/set accessors.
  *
+ * @template {string} EventTypes
+ * @extends BaseObject<EventTypes|'change:extent'|'change:maxResolution'|'change:maxZoom'|'change:minResolution'|'change:minZoom'|'change:opacity'|'change:visible'|'change:zIndex'>
  * @api
  */
 class BaseLayer extends BaseObject {

src/ol/layer/BaseTile.js

@@ -45,7 +45,7 @@ import {assign} from '../obj.js';
  * options means that `title` is observable, and has get/set accessors.
  *
  * @template {import("../source/Tile.js").default} TileSourceType
- * @extends {Layer<TileSourceType>}
+ * @extends Layer<TileSourceType,'preload'|'useInterimTilesOnError'>
  * @api
  */
 class BaseTileLayer extends Layer {

src/ol/layer/BaseVector.js

@@ -73,7 +73,8 @@ const Property = {
  * options means that `title` is observable, and has get/set accessors.
  *
  * @template {import("../source/Vector.js").default|import("../source/VectorTile.js").default} VectorSourceType
- * @extends {Layer<VectorSourceType>}
+ * @template {string} EventTypes
+ * @extends Layer<VectorSourceType,EventTypes>
  * @api
  */
 class BaseVectorLayer extends Layer {

src/ol/layer/Layer.js

@@ -85,6 +85,8 @@ import {listen, unlistenByKey} from '../events.js';
  * @fires import("../render/Event.js").RenderEvent#postrender
  *
  * @template {import("../source/Source.js").default} SourceType
+ * @template {string} EventTypes
+ * @extends BaseLayer<EventTypes|'postrender'|'prerender'>
  * @api
  */
 class Layer extends BaseLayer {

src/ol/layer/VectorTile.js

@@ -74,7 +74,7 @@ import {assign} from '../obj.js';
  * options means that `title` is observable, and has get/set accessors.
  *
  * @param {Options} [opt_options] Options.
- * @extends {BaseVectorLayer<import("../source/VectorTile.js").default>}
+ * @extends BaseVectorLayer<import("../source/VectorTile.js").default,'change:preload'|'change:useInterimTilesOnError'>
  * @api
  */
 class VectorTileLayer extends BaseVectorLayer {