diff --git a/src/ol/interaction/Draw.js b/src/ol/interaction/Draw.js
index 5ad9e1ef4f..3d28104798 100644
--- a/src/ol/interaction/Draw.js
+++ b/src/ol/interaction/Draw.js
@@ -891,7 +891,7 @@ class Draw extends PointerInteraction {
       this.sketchFeature_ = null;
       this.sketchPoint_ = null;
       this.sketchLine_ = null;
-      /** @type {VectorSource} */ (this.overlay_.getSource()).clear(true);
+      this.overlay_.getSource().clear(true);
     }
     return sketchFeature;
   }
@@ -930,7 +930,7 @@ class Draw extends PointerInteraction {
     if (this.sketchPoint_) {
       sketchFeatures.push(this.sketchPoint_);
     }
-    const overlaySource = /** @type {VectorSource} */ (this.overlay_.getSource());
+    const overlaySource = this.overlay_.getSource();
     overlaySource.clear(true);
     overlaySource.addFeatures(sketchFeatures);
   }
diff --git a/src/ol/interaction/Extent.js b/src/ol/interaction/Extent.js
index 1d130c9f91..aba6b4d69e 100644
--- a/src/ol/interaction/Extent.js
+++ b/src/ol/interaction/Extent.js
@@ -242,7 +242,7 @@ class ExtentInteraction extends PointerInteraction {
         extentFeature = new Feature(polygonFromExtent(extent));
       }
       this.extentFeature_ = extentFeature;
-      /** @type {VectorSource} */ (this.extentOverlay_.getSource()).addFeature(extentFeature);
+      this.extentOverlay_.getSource().addFeature(extentFeature);
     } else {
       if (!extent) {
         extentFeature.setGeometry(undefined);
@@ -263,7 +263,7 @@ class ExtentInteraction extends PointerInteraction {
     if (!vertexFeature) {
       vertexFeature = new Feature(new Point(vertex));
       this.vertexFeature_ = vertexFeature;
-      /** @type {VectorSource} */ (this.vertexOverlay_.getSource()).addFeature(vertexFeature);
+      this.vertexOverlay_.getSource().addFeature(vertexFeature);
     } else {
       const geometry = /** @type {Point} */ (vertexFeature.getGeometry());
       geometry.setCoordinates(vertex);
diff --git a/src/ol/interaction/Modify.js b/src/ol/interaction/Modify.js
index 3dbf7b8bd7..8a2382cb25 100644
--- a/src/ol/interaction/Modify.js
+++ b/src/ol/interaction/Modify.js
@@ -368,7 +368,7 @@ class Modify extends PointerInteraction {
     // Remove the vertex feature if the collection of canditate features
     // is empty.
     if (this.vertexFeature_ && this.features_.getLength() === 0) {
-      /** @type {VectorSource} */ (this.overlay_.getSource()).removeFeature(this.vertexFeature_);
+      this.overlay_.getSource().removeFeature(this.vertexFeature_);
       this.vertexFeature_ = null;
     }
     unlisten(feature, EventType.CHANGE,
@@ -407,7 +407,7 @@ class Modify extends PointerInteraction {
    */
   setActive(active) {
     if (this.vertexFeature_ && !active) {
-      /** @type {VectorSource} */ (this.overlay_.getSource()).removeFeature(this.vertexFeature_);
+      this.overlay_.getSource().removeFeature(this.vertexFeature_);
       this.vertexFeature_ = null;
     }
     super.setActive(active);
@@ -658,7 +658,7 @@ class Modify extends PointerInteraction {
     if (!vertexFeature) {
       vertexFeature = new Feature(new Point(coordinates));
       this.vertexFeature_ = vertexFeature;
-      /** @type {VectorSource} */ (this.overlay_.getSource()).addFeature(vertexFeature);
+      this.overlay_.getSource().addFeature(vertexFeature);
     } else {
       const geometry = /** @type {Point} */ (vertexFeature.getGeometry());
       geometry.setCoordinates(coordinates);
@@ -944,7 +944,7 @@ class Modify extends PointerInteraction {
       }
     }
     if (this.vertexFeature_) {
-      /** @type {VectorSource} */ (this.overlay_.getSource()).removeFeature(this.vertexFeature_);
+      this.overlay_.getSource().removeFeature(this.vertexFeature_);
       this.vertexFeature_ = null;
     }
   }
@@ -1139,7 +1139,7 @@ class Modify extends PointerInteraction {
         }
         this.updateSegmentIndices_(geometry, index, segmentData.depth, -1);
         if (this.vertexFeature_) {
-          /** @type {VectorSource} */ (this.overlay_.getSource()).removeFeature(this.vertexFeature_);
+          this.overlay_.getSource().removeFeature(this.vertexFeature_);
           this.vertexFeature_ = null;
         }
         dragSegments.length = 0;
diff --git a/src/ol/interaction/Select.js b/src/ol/interaction/Select.js
index c037025705..f1832eb5df 100644
--- a/src/ol/interaction/Select.js
+++ b/src/ol/interaction/Select.js
@@ -275,7 +275,7 @@ class Select extends Interaction {
    * @api
    */
   getFeatures() {
-    return /** @type {VectorSource} */ (this.featureOverlay_.getSource()).getFeaturesCollection();
+    return this.featureOverlay_.getSource().getFeaturesCollection();
   }
 
   /**
diff --git a/src/ol/layer/Graticule.js b/src/ol/layer/Graticule.js
index 7247d8fe3b..8555c2d346 100644
--- a/src/ol/layer/Graticule.js
+++ b/src/ol/layer/Graticule.js
@@ -437,7 +437,7 @@ class Graticule extends VectorLayer {
    * @param {import("../proj/Projection.js").default} projection Projection
    */
   loaderFunction(extent, resolution, projection) {
-    const source = /** @type {import("../source/Vector.js").default} */ (this.getSource());
+    const source = this.getSource();
 
     // only consider the intersection between our own extent & the requested one
     const layerExtent = this.getExtent() || [-Infinity, -Infinity, Infinity, Infinity];
diff --git a/src/ol/renderer/canvas/ImageLayer.js b/src/ol/renderer/canvas/ImageLayer.js
index 72cbaaeb10..58e52f10dc 100644
--- a/src/ol/renderer/canvas/ImageLayer.js
+++ b/src/ol/renderer/canvas/ImageLayer.js
@@ -44,7 +44,7 @@ class CanvasImageLayerRenderer extends CanvasLayerRenderer {
     const viewResolution = viewState.resolution;
 
     const imageLayer = /** @type {import("../../layer/Image.js").default} */ (this.getLayer());
-    const imageSource = /** @type {import("../../source/Image.js").default} */ (imageLayer.getSource());
+    const imageSource = imageLayer.getSource();
 
     const hints = frameState.viewHints;
 
diff --git a/src/ol/renderer/canvas/TileLayer.js b/src/ol/renderer/canvas/TileLayer.js
index 43dcfba9cc..ac77df3d5e 100644
--- a/src/ol/renderer/canvas/TileLayer.js
+++ b/src/ol/renderer/canvas/TileLayer.js
@@ -88,7 +88,7 @@ class CanvasTileLayerRenderer extends CanvasLayerRenderer {
    */
   getTile(z, x, y, pixelRatio, projection) {
     const tileLayer = /** @type {import("../../layer/Tile.js").default} */ (this.getLayer());
-    const tileSource = /** @type {import("../../source/Tile.js").default} */ (tileLayer.getSource());
+    const tileSource = tileLayer.getSource();
     let tile = tileSource.getTile(z, x, y, pixelRatio, projection);
     if (tile.getState() == TileState.ERROR) {
       if (!tileLayer.getUseInterimTilesOnError()) {
@@ -130,7 +130,7 @@ class CanvasTileLayerRenderer extends CanvasLayerRenderer {
     const pixelRatio = frameState.pixelRatio;
 
     const tileLayer = /** @type {import("../../layer/Tile.js").default} */ (this.getLayer());
-    const tileSource = /** @type {import("../../source/Tile.js").default} */ (tileLayer.getSource());
+    const tileSource = tileLayer.getSource();
     const sourceRevision = tileSource.getRevision();
     const tileGrid = tileSource.getTileGridForProjection(projection);
     const z = tileGrid.getZForResolution(viewResolution, this.zDirection);
@@ -334,7 +334,7 @@ class CanvasTileLayerRenderer extends CanvasLayerRenderer {
     const uid = getUid(this);
     const alpha = transition ? tile.getAlpha(uid, frameState.time) : 1;
     const tileLayer = /** @type {import("../../layer/Tile.js").default} */ (this.getLayer());
-    const tileSource = /** @type {import("../../source/Tile.js").default} */ (tileLayer.getSource());
+    const tileSource = tileLayer.getSource();
     if (alpha === 1 && !tileSource.getOpaque(frameState.viewState.projection)) {
       this.context.clearRect(x, y, w, h);
     }
diff --git a/src/ol/renderer/canvas/VectorLayer.js b/src/ol/renderer/canvas/VectorLayer.js
index 2fcfcdf105..eea1dfa764 100644
--- a/src/ol/renderer/canvas/VectorLayer.js
+++ b/src/ol/renderer/canvas/VectorLayer.js
@@ -129,7 +129,7 @@ class CanvasVectorLayerRenderer extends CanvasLayerRenderer {
     const projection = viewState.projection;
     const rotation = viewState.rotation;
     const projectionExtent = projection.getExtent();
-    const vectorSource = /** @type {import("../../source/Vector.js").default} */ (this.getLayer().getSource());
+    const vectorSource = this.getLayer().getSource();
 
     // clipped rendering if layer extent is set
     const clipExtent = layerState.extent;
@@ -239,7 +239,7 @@ class CanvasVectorLayerRenderer extends CanvasLayerRenderer {
    */
   prepareFrame(frameState, layerState) {
     const vectorLayer = /** @type {import("../../layer/Vector.js").default} */ (this.getLayer());
-    const vectorSource = /** @type {import("../../source/Vector.js").default} */ (vectorLayer.getSource());
+    const vectorSource = vectorLayer.getSource();
 
     const animating = frameState.viewHints[ViewHint.ANIMATING];
     const interacting = frameState.viewHints[ViewHint.INTERACTING];
diff --git a/src/ol/renderer/canvas/VectorTileLayer.js b/src/ol/renderer/canvas/VectorTileLayer.js
index 7c9c643fb9..bba7d651ab 100644
--- a/src/ol/renderer/canvas/VectorTileLayer.js
+++ b/src/ol/renderer/canvas/VectorTileLayer.js
@@ -229,7 +229,7 @@ class CanvasVectorTileLayerRenderer extends CanvasTileLayerRenderer {
    * @private
    */
   updateExecutorGroup_(tile, pixelRatio, projection) {
-    const layer = /** @type {import("../../layer/Vector.js").default} */ (this.getLayer());
+    const layer = /** @type {import("../../layer/VectorTile.js").default} */ (this.getLayer());
     const revision = layer.getRevision();
     const renderOrder = /** @type {import("../../render.js").OrderFunction} */ (layer.getRenderOrder()) || null;
 
@@ -239,7 +239,7 @@ class CanvasVectorTileLayerRenderer extends CanvasTileLayerRenderer {
       return;
     }
 
-    const source = /** @type {import("../../source/VectorTile.js").default} */ (layer.getSource());
+    const source = layer.getSource();
     const sourceTileGrid = source.getTileGrid();
     const tileGrid = source.getTileGridForProjection(projection);
     const zoom = tile.tileCoord[0];
@@ -334,7 +334,7 @@ class CanvasVectorTileLayerRenderer extends CanvasTileLayerRenderer {
     const rotation = frameState.viewState.rotation;
     hitTolerance = hitTolerance == undefined ? 0 : hitTolerance;
     const layer = this.getLayer();
-    const source = /** @type {import("../../source/VectorTile").default} */ (layer.getSource());
+    const source = layer.getSource();
     const tileGrid = source.getTileGridForProjection(frameState.viewState.projection);
     /** @type {!Object<string, boolean>} */
     const features = {};
@@ -378,7 +378,7 @@ class CanvasVectorTileLayerRenderer extends CanvasTileLayerRenderer {
    */
   getReplayTransform_(tile, frameState) {
     const layer = this.getLayer();
-    const source = /** @type {import("../../source/VectorTile.js").default} */ (layer.getSource());
+    const source = layer.getSource();
     const tileGrid = source.getTileGrid();
     const tileCoord = tile.tileCoord;
     const tileResolution = tileGrid.getResolution(tileCoord[0]);
@@ -435,7 +435,7 @@ class CanvasVectorTileLayerRenderer extends CanvasTileLayerRenderer {
 
     const context = this.overlayContext_;
     const declutterReplays = layer.getDeclutter() ? {} : null;
-    const source = /** @type {import("../../source/VectorTile.js").default} */ (layer.getSource());
+    const source = layer.getSource();
     const replayTypes = VECTOR_REPLAYS[renderMode];
     const pixelRatio = frameState.pixelRatio;
     const rotation = frameState.viewState.rotation;
@@ -608,7 +608,7 @@ class CanvasVectorTileLayerRenderer extends CanvasTileLayerRenderer {
     replayState.renderedTileZ = tile.sourceZ;
     const tileCoord = tile.wrappedTileCoord;
     const z = tileCoord[0];
-    const source = /** @type {import("../../source/VectorTile.js").default} */ (layer.getSource());
+    const source = layer.getSource();
     const tileGrid = source.getTileGridForProjection(projection);
     const resolution = tileGrid.getResolution(z);
     const context = tile.getContext(layer);
diff --git a/src/ol/renderer/webgl/PointsLayer.js b/src/ol/renderer/webgl/PointsLayer.js
index 9cd2935c3f..a91473dd5f 100644
--- a/src/ol/renderer/webgl/PointsLayer.js
+++ b/src/ol/renderer/webgl/PointsLayer.js
@@ -264,7 +264,7 @@ class WebGLPointsLayerRenderer extends LayerRenderer {
    */
   prepareFrame(frameState) {
     const vectorLayer = /** @type {import("../../layer/Vector.js").default} */ (this.getLayer());
-    const vectorSource = /** @type {import("../../source/Vector.js").default} */ (vectorLayer.getSource());
+    const vectorSource = vectorLayer.getSource();
 
     const stride = 12;