diff --git a/src/ol/layer/BaseImage.js b/src/ol/layer/BaseImage.js
index 9183382986..59b971c657 100644
--- a/src/ol/layer/BaseImage.js
+++ b/src/ol/layer/BaseImage.js
@@ -6,6 +6,7 @@ import Layer from './Layer.js';
 
 /**
  * @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).
  * @property {boolean} [visible=true] Visibility.
  * @property {import("../extent.js").Extent} [extent] The bounding extent for layer rendering.  The layer will not be
diff --git a/src/ol/layer/BaseVector.js b/src/ol/layer/BaseVector.js
index 441ea30742..8c2024ffd6 100644
--- a/src/ol/layer/BaseVector.js
+++ b/src/ol/layer/BaseVector.js
@@ -8,6 +8,7 @@ import {createDefaultStyle, toFunction as toStyleFunction} from '../style/Style.
 
 /**
  * @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).
  * @property {boolean} [visible=true] Visibility.
  * @property {import("../extent.js").Extent} [extent] The bounding extent for layer rendering.  The layer will not be
diff --git a/src/ol/layer/Graticule.js b/src/ol/layer/Graticule.js
index 56ea5a5be5..d395bc13fa 100644
--- a/src/ol/layer/Graticule.js
+++ b/src/ol/layer/Graticule.js
@@ -52,6 +52,7 @@ const INTERVALS = [
 
 /**
  * @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).
  * @property {boolean} [visible=true] Visibility.
  * @property {import("../extent.js").Extent} [extent] The bounding extent for layer rendering.  The layer will not be
diff --git a/src/ol/layer/Heatmap.js b/src/ol/layer/Heatmap.js
index 4b85070355..d1380103d5 100644
--- a/src/ol/layer/Heatmap.js
+++ b/src/ol/layer/Heatmap.js
@@ -10,6 +10,7 @@ import WebGLPointsLayerRenderer from '../renderer/webgl/PointsLayer.js';
 
 /**
  * @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).
  * @property {boolean} [visible=true] Visibility.
  * @property {import("../extent.js").Extent} [extent] The bounding extent for layer rendering.  The layer will not be
diff --git a/src/ol/layer/Layer.js b/src/ol/layer/Layer.js
index 58f2ef44f2..1e0491608c 100644
--- a/src/ol/layer/Layer.js
+++ b/src/ol/layer/Layer.js
@@ -17,6 +17,7 @@ import SourceState from '../source/State.js';
 
 /**
  * @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).
  * @property {boolean} [visible=true] Visibility.
  * @property {import("../extent.js").Extent} [extent] The bounding extent for layer rendering.  The layer will not be
@@ -35,7 +36,6 @@ import SourceState from '../source/State.js';
  * @property {import("../PluggableMap.js").default} [map] Map.
  * @property {RenderFunction} [render] Render function. Takes the frame state as input and is expected to return an
  * HTML element. Will overwrite the default rendering for the layer.
- * @property {string} [className='ol-layer'] A CSS class name to set to the layer element.
  */
 
 
diff --git a/src/ol/layer/VectorImage.js b/src/ol/layer/VectorImage.js
index 980385da57..b121cc1b83 100644
--- a/src/ol/layer/VectorImage.js
+++ b/src/ol/layer/VectorImage.js
@@ -7,6 +7,7 @@ import CanvasVectorImageLayerRenderer from '../renderer/canvas/VectorImageLayer.
 
 /**
  * @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).
  * @property {boolean} [visible=true] Visibility.
  * @property {import("../extent.js").Extent} [extent] The bounding extent for layer rendering.  The layer will not be
diff --git a/src/ol/layer/VectorTile.js b/src/ol/layer/VectorTile.js
index aa548fbba7..644ac16c48 100644
--- a/src/ol/layer/VectorTile.js
+++ b/src/ol/layer/VectorTile.js
@@ -11,6 +11,7 @@ import {assign} from '../obj.js';
 
 /**
  * @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).
  * @property {boolean} [visible=true] Visibility.
  * @property {import("../extent.js").Extent} [extent] The bounding extent for layer rendering.  The layer will not be