diff --git a/src/ol/render/canvas/canvasreplay.js b/src/ol/render/canvas/canvasreplay.js
index 05c089a75d..00e130f1ac 100644
--- a/src/ol/render/canvas/canvasreplay.js
+++ b/src/ol/render/canvas/canvasreplay.js
@@ -220,7 +220,8 @@ ol.render.canvas.Replay.prototype.beginGeometry = function(geometry, feature) {
  * @param {number} pixelRatio Pixel ratio.
  * @param {goog.vec.Mat4.Number} transform Transform.
  * @param {number} viewRotation View rotation.
- * @param {Object} skippedFeaturesHash Ids of features to skip.
+ * @param {Object.<string, boolean>} skippedFeaturesHash Ids of features
+ *     to skip.
  * @param {Array.<*>} instructions Instructions array.
  * @param {function(ol.Feature): T|undefined} featureCallback Feature callback.
  * @param {ol.Extent=} opt_hitExtent Only check features that intersect this
@@ -496,7 +497,8 @@ ol.render.canvas.Replay.prototype.replay_ = function(
  * @param {number} pixelRatio Pixel ratio.
  * @param {goog.vec.Mat4.Number} transform Transform.
  * @param {number} viewRotation View rotation.
- * @param {Object} skippedFeaturesHash Ids of features to skip
+ * @param {Object.<string, boolean>} skippedFeaturesHash Ids of features
+ *     to skip.
  */
 ol.render.canvas.Replay.prototype.replay = function(
     context, pixelRatio, transform, viewRotation, skippedFeaturesHash) {
@@ -510,7 +512,8 @@ ol.render.canvas.Replay.prototype.replay = function(
  * @param {CanvasRenderingContext2D} context Context.
  * @param {goog.vec.Mat4.Number} transform Transform.
  * @param {number} viewRotation View rotation.
- * @param {Object} skippedFeaturesHash Ids of features to skip
+ * @param {Object.<string, boolean>} skippedFeaturesHash Ids of features
+ *     to skip.
  * @param {function(ol.Feature): T=} opt_featureCallback Feature callback.
  * @param {ol.Extent=} opt_hitExtent Only check features that intersect this
  *     extent.
@@ -1863,7 +1866,8 @@ ol.render.canvas.ReplayGroup.prototype.finish = function() {
  * @param {ol.Coordinate} coordinate Coordinate.
  * @param {number} resolution Resolution.
  * @param {number} rotation Rotation.
- * @param {Object} skippedFeaturesHash Ids of features to skip
+ * @param {Object.<string, boolean>} skippedFeaturesHash Ids of features
+ *     to skip.
  * @param {function(ol.Feature): T} callback Feature callback.
  * @return {T|undefined} Callback result.
  * @template T
@@ -1946,7 +1950,8 @@ ol.render.canvas.ReplayGroup.prototype.isEmpty = function() {
  * @param {number} pixelRatio Pixel ratio.
  * @param {goog.vec.Mat4.Number} transform Transform.
  * @param {number} viewRotation View rotation.
- * @param {Object} skippedFeaturesHash Ids of features to skip
+ * @param {Object.<string, boolean>} skippedFeaturesHash Ids of features
+ *     to skip.
  */
 ol.render.canvas.ReplayGroup.prototype.replay = function(
     context, pixelRatio, transform, viewRotation, skippedFeaturesHash) {
@@ -1995,7 +2000,8 @@ ol.render.canvas.ReplayGroup.prototype.replay = function(
  * @param {CanvasRenderingContext2D} context Context.
  * @param {goog.vec.Mat4.Number} transform Transform.
  * @param {number} viewRotation View rotation.
- * @param {Object} skippedFeaturesHash Ids of features to skip
+ * @param {Object.<string, boolean>} skippedFeaturesHash Ids of features
+ *     to skip.
  * @param {function(ol.Feature): T} featureCallback Feature callback.
  * @param {ol.Extent=} opt_hitExtent Only check features that intersect this
  *     extent.
diff --git a/src/ol/render/webgl/webglreplay.js b/src/ol/render/webgl/webglreplay.js
index 482252ffd1..158d6cffa4 100644
--- a/src/ol/render/webgl/webglreplay.js
+++ b/src/ol/render/webgl/webglreplay.js
@@ -518,7 +518,8 @@ ol.render.webgl.ImageReplay.prototype.createTextures_ =
  * @param {number} contrast Global contrast.
  * @param {number} hue Global hue.
  * @param {number} saturation Global saturation.
- * @param {Object} skippedFeaturesHash Ids of features to skip.
+ * @param {Object.<string, boolean>} skippedFeaturesHash Ids of features
+ *  to skip.
  * @param {function(ol.Feature): T|undefined} featureCallback Feature callback.
  * @param {boolean} oneByOne Draw features one-by-one for the hit-detecion.
  * @param {ol.Extent=} opt_hitExtent Hit extent: Only features intersecting
@@ -657,7 +658,8 @@ ol.render.webgl.ImageReplay.prototype.replay = function(context,
  * @private
  * @param {WebGLRenderingContext} gl gl.
  * @param {ol.webgl.Context} context Context.
- * @param {Object} skippedFeaturesHash Ids of features to skip.
+ * @param {Object.<string, boolean>} skippedFeaturesHash Ids of features
+ *  to skip.
  * @param {Array.<WebGLTexture>} textures Textures.
  * @param {Array.<number>} groupIndices Texture group indices.
  */
@@ -705,7 +707,8 @@ ol.render.webgl.ImageReplay.prototype.drawReplay_ =
  *
  * @private
  * @param {WebGLRenderingContext} gl gl.
- * @param {Object} skippedFeaturesHash Ids of features to skip.
+ * @param {Object.<string, boolean>} skippedFeaturesHash Ids of features
+ *  to skip.
  * @param {Array.<WebGLTexture>} textures Textures.
  * @param {Array.<number>} groupIndices Texture group indices.
  * @param {number} elementType Element type.
@@ -776,7 +779,8 @@ ol.render.webgl.ImageReplay.prototype.drawElements_ = function(
  * @private
  * @param {WebGLRenderingContext} gl gl.
  * @param {ol.webgl.Context} context Context.
- * @param {Object} skippedFeaturesHash Ids of features to skip.
+ * @param {Object.<string, boolean>} skippedFeaturesHash Ids of features
+ *  to skip.
  * @param {function(ol.Feature): T|undefined} featureCallback Feature callback.
  * @param {boolean} oneByOne Draw features one-by-one for the hit-detecion.
  * @param {ol.Extent=} opt_hitExtent Hit extent: Only features intersecting
@@ -803,7 +807,8 @@ ol.render.webgl.ImageReplay.prototype.drawHitDetectionReplay_ =
  * @private
  * @param {WebGLRenderingContext} gl gl.
  * @param {ol.webgl.Context} context Context.
- * @param {Object} skippedFeaturesHash Ids of features to skip.
+ * @param {Object.<string, boolean>} skippedFeaturesHash Ids of features
+ *  to skip.
  * @param {function(ol.Feature): T|undefined} featureCallback Feature callback.
  * @return {T|undefined} Callback result.
  * @template T
@@ -827,7 +832,8 @@ ol.render.webgl.ImageReplay.prototype.drawHitDetectionReplayAll_ =
  * @private
  * @param {WebGLRenderingContext} gl gl.
  * @param {ol.webgl.Context} context Context.
- * @param {Object} skippedFeaturesHash Ids of features to skip.
+ * @param {Object.<string, boolean>} skippedFeaturesHash Ids of features
+ *  to skip.
  * @param {function(ol.Feature): T|undefined} featureCallback Feature callback.
  * @param {ol.Extent=} opt_hitExtent Hit extent: Only features intersecting
  *  this extent are checked.
@@ -1063,7 +1069,8 @@ ol.render.webgl.ReplayGroup.prototype.isEmpty = function() {
  * @param {number} contrast Global contrast.
  * @param {number} hue Global hue.
  * @param {number} saturation Global saturation.
- * @param {Object} skippedFeaturesHash Ids of features to skip.
+ * @param {Object.<string, boolean>} skippedFeaturesHash Ids of features
+ *  to skip.
  */
 ol.render.webgl.ReplayGroup.prototype.replay = function(context,
     center, resolution, rotation, size, pixelRatio,
@@ -1094,7 +1101,8 @@ ol.render.webgl.ReplayGroup.prototype.replay = function(context,
  * @param {number} contrast Global contrast.
  * @param {number} hue Global hue.
  * @param {number} saturation Global saturation.
- * @param {Object} skippedFeaturesHash Ids of features to skip.
+ * @param {Object.<string, boolean>} skippedFeaturesHash Ids of features
+ *  to skip.
  * @param {function(ol.Feature): T|undefined} featureCallback Feature callback.
  * @param {boolean} oneByOne Draw features one-by-one for the hit-detecion.
  * @param {ol.Extent=} opt_hitExtent Hit extent: Only features intersecting
@@ -1136,7 +1144,8 @@ ol.render.webgl.ReplayGroup.prototype.replayHitDetection_ = function(context,
  * @param {number} contrast Global contrast.
  * @param {number} hue Global hue.
  * @param {number} saturation Global saturation.
- * @param {Object} skippedFeaturesHash Ids of features to skip.
+ * @param {Object.<string, boolean>} skippedFeaturesHash Ids of features
+ *  to skip.
  * @param {function(ol.Feature): T|undefined} callback Feature callback.
  * @return {T|undefined} Callback result.
  * @template T
@@ -1197,7 +1206,8 @@ ol.render.webgl.ReplayGroup.prototype.forEachFeatureAtCoordinate = function(
  * @param {number} contrast Global contrast.
  * @param {number} hue Global hue.
  * @param {number} saturation Global saturation.
- * @param {Object} skippedFeaturesHash Ids of features to skip.
+ * @param {Object.<string, boolean>} skippedFeaturesHash Ids of features
+ *  to skip.
  * @return {boolean} Is there a feature at the given coordinate?
  */
 ol.render.webgl.ReplayGroup.prototype.hasFeatureAtCoordinate = function(