Explicit void

src/ol/renderer/Layer.js

@@ -7,7 +7,7 @@ import Observable from '../Observable.js';
 import TileState from '../TileState.js';
 import {listen} from '../events.js';
 import EventType from '../events/EventType.js';
-import {FALSE, UNDEFINED} from '../functions.js';
+import {FALSE, VOID} from '../functions.js';
 import SourceState from '../source/State.js';
 
 class LayerRenderer extends Observable {
@@ -225,10 +225,10 @@ class LayerRenderer extends Observable {
  * @param {number} hitTolerance Hit tolerance in pixels.
  * @param {function(this: S, (module:ol/Feature|module:ol/render/Feature), module:ol/layer/Layer): T} callback Feature callback.
  * @param {S} thisArg Value to use as `this` when executing `callback`.
- * @return {T|undefined} Callback result.
+ * @return {T|void} Callback result.
  * @template S,T
  */
-LayerRenderer.prototype.forEachFeatureAtCoordinate = UNDEFINED;
+LayerRenderer.prototype.forEachFeatureAtCoordinate = VOID;
 
 
 /**

src/ol/renderer/Map.js

@@ -6,7 +6,7 @@ import Disposable from '../Disposable.js';
 import {listen, unlistenByKey} from '../events.js';
 import EventType from '../events/EventType.js';
 import {getWidth} from '../extent.js';
-import {TRUE, UNDEFINED} from '../functions.js';
+import {TRUE, VOID} from '../functions.js';
 import {visibleAtResolution} from '../layer/Layer.js';
 import {shared as iconImageCache} from '../style/IconImageCache.js';
 import {compose as composeTransform, invert as invertTransform, setFromArray as transformSetFromArray} from '../transform.js';
@@ -329,7 +329,7 @@ function expireIconCache(map, frameState) {
  * Render.
  * @param {?module:ol/PluggableMap~FrameState} frameState Frame state.
  */
-MapRenderer.prototype.renderFrame = UNDEFINED;
+MapRenderer.prototype.renderFrame = VOID;
 
 
 /**

src/ol/renderer/canvas/IntermediateCanvas.js

@@ -4,7 +4,7 @@
 import {scale as scaleCoordinate} from '../../coordinate.js';
 import {createCanvasContext2D} from '../../dom.js';
 import {containsExtent, intersects} from '../../extent.js';
-import {UNDEFINED} from '../../functions.js';
+import {VOID} from '../../functions.js';
 import CanvasLayerRenderer from '../canvas/Layer.js';
 import {create as createTransform, apply as applyTransform} from '../../transform.js';
 
@@ -115,7 +115,7 @@ class IntermediateCanvasRenderer extends CanvasLayerRenderer {
       return undefined;
     }
 
-    if (this.getLayer().getSource().forEachFeatureAtCoordinate !== UNDEFINED) {
+    if (this.getLayer().getSource().forEachFeatureAtCoordinate !== VOID) {
       // for ImageCanvas sources use the original hit-detection logic,
       // so that for example also transparent polygons are detected
       return CanvasLayerRenderer.prototype.forEachLayerAtCoordinate.apply(this, arguments);

src/ol/renderer/webgl/ImageLayer.js

@@ -2,7 +2,7 @@
  * @module ol/renderer/webgl/ImageLayer
  */
 import {ENABLE_RASTER_REPROJECTION} from '../../reproj/common.js';
-import {TRUE, UNDEFINED} from '../../functions.js';
+import {TRUE, VOID} from '../../functions.js';
 import LayerType from '../../LayerType.js';
 import ViewHint from '../../ViewHint.js';
 import {createCanvasContext2D} from '../../dom.js';
@@ -230,7 +230,7 @@ class WebGLImageLayerRenderer extends WebGLLayerRenderer {
       return undefined;
     }
 
-    if (this.getLayer().getSource().forEachFeatureAtCoordinate !== UNDEFINED) {
+    if (this.getLayer().getSource().forEachFeatureAtCoordinate !== VOID) {
       // for ImageCanvas sources use the original hit-detection logic,
       // so that for example also transparent polygons are detected
       const coordinate = applyTransform(