diff --git a/package-lock.json b/package-lock.json
index 8f80bc6d52..ddc1d50373 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -23,6 +23,7 @@
         "@rollup/plugin-node-resolve": "^13.0.0",
         "@types/arcgis-rest-api": "^10.4.4",
         "@types/geojson": "^7946.0.7",
+        "@types/offscreencanvas": "^2019.6.4",
         "@types/pbf": "^3.0.2",
         "@types/topojson-specification": "^1.0.1",
         "babel-loader": "^8.2.2",
@@ -62,6 +63,7 @@
         "shx": "^0.3.2",
         "sinon": "^12.0.1",
         "threads": "^1.6.5",
+        "typescript": "^4.6.0-beta",
         "walk": "^2.3.9",
         "webpack": "^5.27.2",
         "webpack-cli": "^4.5.0",
@@ -2132,6 +2134,12 @@
       "integrity": "sha512-dueRKfaJL4RTtSa7bWeTK1M+VH+Gns73oCgzvYfHZywRCoPSd8EkXBL0mZ9unPTveBn+D9phZBaxuzpwjWkW0g==",
       "dev": true
     },
+    "node_modules/@types/offscreencanvas": {
+      "version": "2019.6.4",
+      "resolved": "https://registry.npmjs.org/@types/offscreencanvas/-/offscreencanvas-2019.6.4.tgz",
+      "integrity": "sha512-u8SAgdZ8ROtkTF+mfZGOscl0or6BSj9A4g37e6nvxDc+YB/oDut0wHkK2PBBiC2bNR8TS0CPV+1gAk4fNisr1Q==",
+      "dev": true
+    },
     "node_modules/@types/pbf": {
       "version": "3.0.2",
       "resolved": "https://registry.npmjs.org/@types/pbf/-/pbf-3.0.2.tgz",
@@ -9463,6 +9471,19 @@
         "node": ">= 0.6"
       }
     },
+    "node_modules/typescript": {
+      "version": "4.6.0-beta",
+      "resolved": "https://registry.npmjs.org/typescript/-/typescript-4.6.0-beta.tgz",
+      "integrity": "sha512-xg5avH08DioTdxex568HFLHvnHWxGzpu9FK0ehLNwlqzx/kjy5/qEkBmkbPlvC9xs45bc7gbAbEhNqtczJsHAg==",
+      "dev": true,
+      "bin": {
+        "tsc": "bin/tsc",
+        "tsserver": "bin/tsserver"
+      },
+      "engines": {
+        "node": ">=4.2.0"
+      }
+    },
     "node_modules/ua-parser-js": {
       "version": "0.7.31",
       "resolved": "https://registry.npmjs.org/ua-parser-js/-/ua-parser-js-0.7.31.tgz",
@@ -11915,6 +11936,12 @@
       "integrity": "sha512-dueRKfaJL4RTtSa7bWeTK1M+VH+Gns73oCgzvYfHZywRCoPSd8EkXBL0mZ9unPTveBn+D9phZBaxuzpwjWkW0g==",
       "dev": true
     },
+    "@types/offscreencanvas": {
+      "version": "2019.6.4",
+      "resolved": "https://registry.npmjs.org/@types/offscreencanvas/-/offscreencanvas-2019.6.4.tgz",
+      "integrity": "sha512-u8SAgdZ8ROtkTF+mfZGOscl0or6BSj9A4g37e6nvxDc+YB/oDut0wHkK2PBBiC2bNR8TS0CPV+1gAk4fNisr1Q==",
+      "dev": true
+    },
     "@types/pbf": {
       "version": "3.0.2",
       "resolved": "https://registry.npmjs.org/@types/pbf/-/pbf-3.0.2.tgz",
@@ -17561,6 +17588,12 @@
         "mime-types": "~2.1.24"
       }
     },
+    "typescript": {
+      "version": "4.6.0-beta",
+      "resolved": "https://registry.npmjs.org/typescript/-/typescript-4.6.0-beta.tgz",
+      "integrity": "sha512-xg5avH08DioTdxex568HFLHvnHWxGzpu9FK0ehLNwlqzx/kjy5/qEkBmkbPlvC9xs45bc7gbAbEhNqtczJsHAg==",
+      "dev": true
+    },
     "ua-parser-js": {
       "version": "0.7.31",
       "resolved": "https://registry.npmjs.org/ua-parser-js/-/ua-parser-js-0.7.31.tgz",
diff --git a/package.json b/package.json
index 1159c0af96..a4f5814ac6 100644
--- a/package.json
+++ b/package.json
@@ -25,9 +25,9 @@
     "build-legacy": "shx rm -rf build/legacy && npm run build-index && webpack --config config/webpack-config-legacy-build.mjs && cleancss --source-map src/ol/ol.css -o build/legacy/ol.css",
     "build-site": "shx rm -rf build/site && npm run build-examples && npm run apidoc && npm run build-legacy && shx mkdir -p build/site && shx cp site/index.html build/site/ && shx mv build/apidoc build/examples build/legacy build/site/",
     "copy-css": "shx cp src/ol/ol.css build/ol/ol.css",
-    "generate-types": "npx --package=typescript@3.8.3 -y -- tsc --project config/tsconfig-build.json --declaration --declarationMap --emitDeclarationOnly --outdir build/ol",
-    "transpile": "shx rm -rf build/ol && shx mkdir -p build/ol && shx cp -rf src/ol build/ol/src && node tasks/serialize-workers.cjs && npx --package=typescript@4.3.5 -y -- tsc --project config/tsconfig-build.json",
-    "typecheck": "npx --package=typescript@4.3.5 -y -- tsc --pretty",
+    "generate-types": "tsc --project config/tsconfig-build.json --declaration --declarationMap --emitDeclarationOnly --outdir build/ol",
+    "transpile": "shx rm -rf build/ol && shx mkdir -p build/ol && shx cp -rf src/ol build/ol/src && node tasks/serialize-workers.cjs && tsc --project config/tsconfig-build.json",
+    "typecheck": "tsc --pretty",
     "apidoc-debug": "shx rm -rf build/apidoc && node --inspect-brk=9229 ./node_modules/jsdoc/jsdoc.js -R config/jsdoc/api/index.md -c config/jsdoc/api/conf.json -P package.json -d build/apidoc",
     "apidoc": "shx rm -rf build/apidoc && jsdoc -R config/jsdoc/api/index.md -c config/jsdoc/api/conf.json -P package.json -d build/apidoc"
   },
@@ -59,6 +59,7 @@
     "@rollup/plugin-node-resolve": "^13.0.0",
     "@types/arcgis-rest-api": "^10.4.4",
     "@types/geojson": "^7946.0.7",
+    "@types/offscreencanvas": "^2019.6.4",
     "@types/pbf": "^3.0.2",
     "@types/topojson-specification": "^1.0.1",
     "babel-loader": "^8.2.2",
@@ -98,6 +99,7 @@
     "shx": "^0.3.2",
     "sinon": "^12.0.1",
     "threads": "^1.6.5",
+    "typescript": "^4.6.0-beta",
     "walk": "^2.3.9",
     "webpack": "^5.27.2",
     "webpack-cli": "^4.5.0",
diff --git a/src/ol/Feature.js b/src/ol/Feature.js
index 4bfb5401de..4ab77b4393 100644
--- a/src/ol/Feature.js
+++ b/src/ol/Feature.js
@@ -11,7 +11,7 @@ import {listen, unlistenByKey} from './events.js';
  */
 
 /**
- * @typedef {Feature<import("./geom/Geometry.js").default>|import("./render/Feature.js").default} FeatureLike
+ * @typedef {Feature|import("./render/Feature.js").default} FeatureLike
  */
 
 /***
@@ -70,7 +70,7 @@ import {listen, unlistenByKey} from './events.js';
  * ```
  *
  * @api
- * @template {import("./geom/Geometry.js").default} Geometry
+ * @template {import("./geom/Geometry.js").default} [Geometry=import("./geom/Geometry.js").default]
  */
 class Feature extends BaseObject {
   /**
diff --git a/src/ol/format/GML2.js b/src/ol/format/GML2.js
index 03bfdc3807..a480d9b157 100644
--- a/src/ol/format/GML2.js
+++ b/src/ol/format/GML2.js
@@ -393,7 +393,7 @@ class GML2 extends GMLBase {
   }
 
   /**
-   * @param {Node} node Node.
+   * @param {Element} node Node.
    * @param {import("../geom/LineString.js").default} line LineString geometry.
    * @param {Array<*>} objectStack Node stack.
    * @private
@@ -455,7 +455,7 @@ class GML2 extends GMLBase {
   }
 
   /**
-   * @param {Node} node Node.
+   * @param {Element} node Node.
    * @param {import("../geom/Polygon.js").default} polygon Polygon geometry.
    * @param {Array<*>} objectStack Node stack.
    * @private
@@ -467,7 +467,7 @@ class GML2 extends GMLBase {
   }
 
   /**
-   * @param {Node} node Node.
+   * @param {Element} node Node.
    * @param {import("../geom/LinearRing.js").default} ring LinearRing geometry.
    * @param {Array<*>} objectStack Node stack.
    */
@@ -546,7 +546,7 @@ class GML2 extends GMLBase {
   }
 
   /**
-   * @param {Node} node Node.
+   * @param {Element} node Node.
    * @param {import("../geom/Point.js").default} point Point geometry.
    * @param {Array<*>} objectStack Node stack.
    */
diff --git a/src/ol/format/GML3.js b/src/ol/format/GML3.js
index a16fcc0995..e1d6a878d0 100644
--- a/src/ol/format/GML3.js
+++ b/src/ol/format/GML3.js
@@ -720,7 +720,7 @@ class GML3 extends GMLBase {
   }
 
   /**
-   * @param {Node} node Node.
+   * @param {Element} node Node.
    * @param {import("../geom/LinearRing.js").default} ring LinearRing geometry.
    * @param {Array<*>} objectStack Node stack.
    */
@@ -744,7 +744,7 @@ class GML3 extends GMLBase {
   }
 
   /**
-   * @param {Node} node Node.
+   * @param {Element} node Node.
    * @param {import("../geom/Point.js").default} point Point geometry.
    * @param {Array<*>} objectStack Node stack.
    */
@@ -768,7 +768,7 @@ class GML3 extends GMLBase {
   }
 
   /**
-   * @param {Node} node Node.
+   * @param {Element} node Node.
    * @param {Polygon} polygon Polygon geometry.
    * @param {Array<*>} objectStack Node stack.
    * @private
@@ -780,7 +780,7 @@ class GML3 extends GMLBase {
   }
 
   /**
-   * @param {Node} node Node.
+   * @param {Element} node Node.
    * @param {LineString} line LineString geometry.
    * @param {Array<*>} objectStack Node stack.
    * @private
diff --git a/src/ol/format/GMLBase.js b/src/ol/format/GMLBase.js
index d2b6cfd912..595848f70e 100644
--- a/src/ol/format/GMLBase.js
+++ b/src/ol/format/GMLBase.js
@@ -166,7 +166,7 @@ class GMLBase extends XMLFeature {
       if (!featureType && node.childNodes) {
         (featureType = []), (featureNS = {});
         for (let i = 0, ii = node.childNodes.length; i < ii; ++i) {
-          const child = node.childNodes[i];
+          const child = /** @type {Element} */ (node.childNodes[i]);
           if (child.nodeType === 1) {
             const ft = child.nodeName.split(':').pop();
             if (featureType.indexOf(ft) === -1) {
diff --git a/src/ol/format/GPX.js b/src/ol/format/GPX.js
index ea15be4fe9..6240464e7c 100644
--- a/src/ol/format/GPX.js
+++ b/src/ol/format/GPX.js
@@ -869,7 +869,7 @@ function writeRte(node, feature, objectStack) {
 }
 
 /**
- * @param {Node} node Node.
+ * @param {Element} node Node.
  * @param {Feature} feature Feature.
  * @param {Array<*>} objectStack Object stack.
  */
@@ -902,7 +902,7 @@ function writeTrk(node, feature, objectStack) {
 }
 
 /**
- * @param {Node} node Node.
+ * @param {Element} node Node.
  * @param {LineString} lineString LineString.
  * @param {Array<*>} objectStack Object stack.
  */
diff --git a/src/ol/format/KML.js b/src/ol/format/KML.js
index fbef902363..4c87601b00 100644
--- a/src/ol/format/KML.js
+++ b/src/ol/format/KML.js
@@ -1007,8 +1007,7 @@ function createFeatureStyleFunction(
       if (drawName) {
         const geometry = feature.getGeometry();
         if (geometry) {
-          const type = geometry.getType();
-          if (type === GeometryType.GEOMETRY_COLLECTION) {
+          if (geometry instanceof GeometryCollection) {
             multiGeometryPoints = geometry
               .getGeometriesArrayRecursive()
               .filter(function (geometry) {
@@ -1020,6 +1019,7 @@ function createFeatureStyleFunction(
               });
             drawName = multiGeometryPoints.length > 0;
           } else {
+            const type = geometry.getType();
             drawName =
               type === GeometryType.POINT || type === GeometryType.MULTI_POINT;
           }
@@ -2473,7 +2473,7 @@ const DOCUMENT_NODE_FACTORY = function (value, objectStack, opt_nodeName) {
 };
 
 /**
- * @param {Node} node Node.
+ * @param {Element} node Node.
  * @param {Array<Feature>} features Features.
  * @param {Array<*>} objectStack Object stack.
  * @this {KML}
@@ -2499,7 +2499,7 @@ function writeDocument(node, features, objectStack) {
 const DATA_NODE_FACTORY = makeSimpleNodeFactory('Data');
 
 /**
- * @param {Node} node Node.
+ * @param {Element} node Node.
  * @param {{names: Array<string>, values: (Array<*>)}} namesAndValues Names and values.
  * @param {Array<*>} objectStack Object stack.
  */
@@ -2561,7 +2561,7 @@ const GX_NODE_FACTORY = function (value, objectStack, opt_nodeName) {
 };
 
 /**
- * @param {Node} node Node.
+ * @param {Element} node Node.
  * @param {Object} icon Icon object.
  * @param {Array<*>} objectStack Object stack.
  */
@@ -2617,7 +2617,7 @@ const ICON_STYLE_SERIALIZERS = makeStructureNS(NAMESPACE_URIS, {
 });
 
 /**
- * @param {Node} node Node.
+ * @param {Element} node Node.
  * @param {import("../style/Icon.js").default} style Icon style.
  * @param {Array<*>} objectStack Object stack.
  */
@@ -2712,7 +2712,7 @@ const LABEL_STYLE_SERIALIZERS = makeStructureNS(NAMESPACE_URIS, {
 });
 
 /**
- * @param {Node} node Node.
+ * @param {Element} node Node.
  * @param {Text} style style.
  * @param {Array<*>} objectStack Object stack.
  */
@@ -2758,7 +2758,7 @@ const LINE_STYLE_SERIALIZERS = makeStructureNS(NAMESPACE_URIS, {
 });
 
 /**
- * @param {Node} node Node.
+ * @param {Element} node Node.
  * @param {Stroke} style style.
  * @param {Array<*>} objectStack Object stack.
  */
@@ -2856,7 +2856,7 @@ const MULTI_GEOMETRY_SERIALIZERS = makeStructureNS(NAMESPACE_URIS, {
 });
 
 /**
- * @param {Node} node Node.
+ * @param {Element} node Node.
  * @param {import("../geom/Geometry.js").default} geometry Geometry.
  * @param {Array<*>} objectStack Object stack.
  */
@@ -2927,7 +2927,7 @@ const BOUNDARY_IS_SERIALIZERS = makeStructureNS(NAMESPACE_URIS, {
 });
 
 /**
- * @param {Node} node Node.
+ * @param {Element} node Node.
  * @param {import("../geom/LinearRing.js").default} linearRing Linear ring.
  * @param {Array<*>} objectStack Object stack.
  */
@@ -3180,7 +3180,7 @@ const PRIMITIVE_GEOMETRY_SERIALIZERS = makeStructureNS(NAMESPACE_URIS, {
 });
 
 /**
- * @param {Node} node Node.
+ * @param {Element} node Node.
  * @param {import("../geom/SimpleGeometry.js").default} geometry Geometry.
  * @param {Array<*>} objectStack Object stack.
  */
@@ -3243,7 +3243,7 @@ const INNER_BOUNDARY_NODE_FACTORY = makeSimpleNodeFactory('innerBoundaryIs');
 const OUTER_BOUNDARY_NODE_FACTORY = makeSimpleNodeFactory('outerBoundaryIs');
 
 /**
- * @param {Node} node Node.
+ * @param {Element} node Node.
  * @param {Polygon} polygon Polygon.
  * @param {Array<*>} objectStack Object stack.
  */
@@ -3281,7 +3281,7 @@ const POLY_STYLE_SERIALIZERS = makeStructureNS(NAMESPACE_URIS, {
 });
 
 /**
- * @param {Node} node Node.
+ * @param {Element} node Node.
  * @param {Style} style Style.
  * @param {Array<*>} objectStack Object stack.
  */
@@ -3341,7 +3341,7 @@ const STYLE_SERIALIZERS = makeStructureNS(NAMESPACE_URIS, {
 });
 
 /**
- * @param {Node} node Node.
+ * @param {Element} node Node.
  * @param {Object<string, Array<Style>>} styles Styles.
  * @param {Array<*>} objectStack Object stack.
  */
diff --git a/src/ol/format/Polyline.js b/src/ol/format/Polyline.js
index f0c9ae1820..b87c162be1 100644
--- a/src/ol/format/Polyline.js
+++ b/src/ol/format/Polyline.js
@@ -110,7 +110,7 @@ class Polyline extends TextFeature {
   }
 
   /**
-   * @param {import("../Feature.js").default} feature Features.
+   * @param {import("../Feature.js").default<LineString>} feature Features.
    * @param {import("./Feature.js").WriteOptions} [opt_options] Write options.
    * @protected
    * @return {string} Text.
@@ -126,7 +126,7 @@ class Polyline extends TextFeature {
   }
 
   /**
-   * @param {Array<import("../Feature.js").default>} features Features.
+   * @param {Array<import("../Feature.js").default<LineString>>} features Features.
    * @param {import("./Feature.js").WriteOptions} [opt_options] Write options.
    * @protected
    * @return {string} Text.
diff --git a/src/ol/format/WFS.js b/src/ol/format/WFS.js
index dadf744a85..1d689de011 100644
--- a/src/ol/format/WFS.js
+++ b/src/ol/format/WFS.js
@@ -1054,7 +1054,7 @@ function writeQuery(node, featureType, objectStack) {
 }
 
 /**
- * @param {Node} node Node.
+ * @param {Element} node Node.
  * @param {import("./filter/Filter.js").default} filter Filter.
  * @param {Array<*>} objectStack Node stack.
  */
@@ -1158,7 +1158,7 @@ function writeDuringFilter(node, filter, objectStack) {
 }
 
 /**
- * @param {Node} node Node.
+ * @param {Element} node Node.
  * @param {import("./filter/LogicalNary.js").default} filter Filter.
  * @param {Array<*>} objectStack Node stack.
  */
@@ -1182,7 +1182,7 @@ function writeLogicalFilter(node, filter, objectStack) {
 }
 
 /**
- * @param {Node} node Node.
+ * @param {Element} node Node.
  * @param {import("./filter/Not.js").default} filter Filter.
  * @param {Array<*>} objectStack Node stack.
  */
@@ -1341,7 +1341,7 @@ export function writeFilter(filter, opt_version) {
 }
 
 /**
- * @param {Node} node Node.
+ * @param {Element} node Node.
  * @param {Array<string>} featureTypes Feature types.
  * @param {Array<*>} objectStack Node stack.
  */
diff --git a/src/ol/interaction/Draw.js b/src/ol/interaction/Draw.js
index f01e3e1a9c..64c7be6c98 100644
--- a/src/ol/interaction/Draw.js
+++ b/src/ol/interaction/Draw.js
@@ -421,7 +421,7 @@ class Draw extends PointerInteraction {
 
     /**
      * Sketch feature.
-     * @type {Feature}
+     * @type {Feature<import('../geom/SimpleGeometry.js').default>}
      * @private
      */
     this.sketchFeature_ = null;
@@ -1022,7 +1022,7 @@ class Draw extends PointerInteraction {
 
   /**
    * Stop drawing without adding the sketch feature to the target layer.
-   * @return {Feature} The sketch feature (or null if none).
+   * @return {Feature<import("../geom/SimpleGeometry.js").default>} The sketch feature (or null if none).
    * @private
    */
   abortDrawing_() {
diff --git a/src/ol/interaction/Modify.js b/src/ol/interaction/Modify.js
index 0807ea0da4..ebd4aba6c6 100644
--- a/src/ol/interaction/Modify.js
+++ b/src/ol/interaction/Modify.js
@@ -253,7 +253,7 @@ class Modify extends PointerInteraction {
 
     /**
      * Editing vertex.
-     * @type {Feature}
+     * @type {Feature<Point>}
      * @private
      */
     this.vertexFeature_ = null;
diff --git a/src/ol/layer/Layer.js b/src/ol/layer/Layer.js
index 87dce260ca..0c55fdc460 100644
--- a/src/ol/layer/Layer.js
+++ b/src/ol/layer/Layer.js
@@ -25,7 +25,7 @@ import {listen, unlistenByKey} from '../events.js';
  */
 
 /**
- * @template {import("../source/Source.js").default} SourceType
+ * @template {import("../source/Source.js").default} [SourceType=import("../source/Source.js").default]
  * @typedef {Object} Options
  * @property {string} [className='ol-layer'] A CSS class name to set to the layer element.
  * @property {number} [opacity=1] Opacity (0, 1).
@@ -93,8 +93,8 @@ import {listen, unlistenByKey} from '../events.js';
  * @fires import("../render/Event.js").RenderEvent#prerender
  * @fires import("../render/Event.js").RenderEvent#postrender
  *
- * @template {import("../source/Source.js").default} SourceType
- * @template {import("../renderer/Layer.js").default} RendererType
+ * @template {import("../source/Source.js").default} [SourceType=import("../source/Source.js").default]
+ * @template {import("../renderer/Layer.js").default} [RendererType=import("../renderer/Layer.js").default]
  * @api
  */
 class Layer extends BaseLayer {
diff --git a/src/ol/renderer/webgl/TileLayer.js b/src/ol/renderer/webgl/TileLayer.js
index 2af3a33b3d..efce2e56cb 100644
--- a/src/ol/renderer/webgl/TileLayer.js
+++ b/src/ol/renderer/webgl/TileLayer.js
@@ -96,8 +96,9 @@ function getRenderExtent(frameState, extent) {
       fromUserExtent(layerState.extent, frameState.viewState.projection)
     );
   }
-  const source =
-    /** {import("../../source/Tile.js").default} */ layerState.layer.getRenderSource();
+  const source = /** @type {import("../../source/Tile.js").default} */ (
+    layerState.layer.getRenderSource()
+  );
   if (!source.getWrapX()) {
     const gridExtent = source
       .getTileGridForProjection(frameState.viewState.projection)
diff --git a/src/ol/source/Cluster.js b/src/ol/source/Cluster.js
index 66fc33e4fe..5621a33d7f 100644
--- a/src/ol/source/Cluster.js
+++ b/src/ol/source/Cluster.js
@@ -115,7 +115,7 @@ class Cluster extends VectorSource {
     this.geometryFunction =
       options.geometryFunction ||
       function (feature) {
-        const geometry = feature.getGeometry();
+        const geometry = /** @type {Point} */ (feature.getGeometry());
         assert(geometry.getType() == GeometryType.POINT, 10); // The default `geometryFunction` can only handle `Point` geometries
         return geometry;
       };
diff --git a/src/ol/source/TileJSON.js b/src/ol/source/TileJSON.js
index b86b413d06..2ee8e8f5c4 100644
--- a/src/ol/source/TileJSON.js
+++ b/src/ol/source/TileJSON.js
@@ -139,7 +139,7 @@ class TileJSON extends TileImage {
     if (!client.status || (client.status >= 200 && client.status < 300)) {
       let response;
       try {
-        response = /** @type {TileJSON} */ (JSON.parse(client.responseText));
+        response = /** @type {Config} */ (JSON.parse(client.responseText));
       } catch (err) {
         this.handleTileJSONError();
         return;
diff --git a/src/ol/source/Vector.js b/src/ol/source/Vector.js
index 32d6cf6644..77f4f61bd8 100644
--- a/src/ol/source/Vector.js
+++ b/src/ol/source/Vector.js
@@ -34,7 +34,7 @@ import {xhr} from '../featureloader.js';
  * @classdesc
  * Events emitted by {@link module:ol/source/Vector} instances are instances of this
  * type.
- * @template {import("../geom/Geometry.js").default} Geometry
+ * @template {import("../geom/Geometry.js").default} [Geometry=import("../geom/Geometry.js").default]
  */
 export class VectorSourceEvent extends Event {
   /**
@@ -170,7 +170,7 @@ export class VectorSourceEvent extends Event {
  *
  * @fires VectorSourceEvent
  * @api
- * @template {import("../geom/Geometry.js").default} Geometry
+ * @template {import("../geom/Geometry.js").default} [Geometry=import("../geom/Geometry.js").default]
  */
 class VectorSource extends Source {
   /**
@@ -299,9 +299,15 @@ class VectorSource extends Source {
 
     let collection, features;
     if (Array.isArray(options.features)) {
-      features = options.features;
+      features =
+        /** @type {Array<import("../Feature.js").default<Geometry>>} */ (
+          options.features
+        );
     } else if (options.features) {
-      collection = options.features;
+      collection =
+        /** @type {Collection<import("../Feature.js").default<Geometry>>} */ (
+          options.features
+        );
       features = collection.getArray();
     }
     if (!useSpatialIndex && collection === undefined) {
diff --git a/src/ol/xml.js b/src/ol/xml.js
index fe4b6884ef..feb9cc5191 100644
--- a/src/ol/xml.js
+++ b/src/ol/xml.js
@@ -8,7 +8,7 @@ import {extend} from './array.js';
  * {@link module:ol/xml.makeSimpleNodeFactory}, the top `objectStack` item needs
  * to have this structure.
  * @typedef {Object} NodeStackItem
- * @property {Node} node Node.
+ * @property {Element} node Node.
  */
 
 /**