diff --git a/src/ol/array.js b/src/ol/array.js
index 6c0e28ab62..df93d69eb8 100644
--- a/src/ol/array.js
+++ b/src/ol/array.js
@@ -169,7 +169,7 @@ ol.array.reverseSubArray = function(arr, begin, end) {
  */
 ol.array.flatten = function(arr) {
   var data = arr.reduce(function(flattened, value) {
-    if (goog.isArray(value)) {
+    if (Array.isArray(value)) {
       return flattened.concat(ol.array.flatten(value));
     } else {
       return flattened.concat(value);
diff --git a/src/ol/color/color.js b/src/ol/color/color.js
index 9f6d631573..4953ef43b2 100644
--- a/src/ol/color/color.js
+++ b/src/ol/color/color.js
@@ -61,7 +61,7 @@ ol.color.rgbaColorRe_ =
  * @api
  */
 ol.color.asArray = function(color) {
-  if (goog.isArray(color)) {
+  if (Array.isArray(color)) {
     return color;
   } else {
     goog.asserts.assert(typeof color === 'string', 'Color should be a string');
@@ -80,7 +80,7 @@ ol.color.asString = function(color) {
   if (typeof color === 'string') {
     return color;
   } else {
-    goog.asserts.assert(goog.isArray(color), 'Color should be an array');
+    goog.asserts.assert(Array.isArray(color), 'Color should be an array');
     return ol.color.toString(color);
   }
 };
diff --git a/src/ol/feature.js b/src/ol/feature.js
index 3d730a337f..9d07bd8c82 100644
--- a/src/ol/feature.js
+++ b/src/ol/feature.js
@@ -314,7 +314,7 @@ ol.Feature.createStyleFunction = function(obj) {
      * @type {Array.<ol.style.Style>}
      */
     var styles;
-    if (goog.isArray(obj)) {
+    if (Array.isArray(obj)) {
       styles = obj;
     } else {
       goog.asserts.assertInstanceof(obj, ol.style.Style,
diff --git a/src/ol/format/esrijsonformat.js b/src/ol/format/esrijsonformat.js
index ccc57cbf6c..6bed7afb51 100644
--- a/src/ol/format/esrijsonformat.js
+++ b/src/ol/format/esrijsonformat.js
@@ -170,7 +170,7 @@ ol.format.EsriJSON.readPointGeometry_ = function(object) {
  * @return {ol.geom.Geometry} LineString.
  */
 ol.format.EsriJSON.readLineStringGeometry_ = function(object) {
-  goog.asserts.assert(goog.isArray(object.paths),
+  goog.asserts.assert(Array.isArray(object.paths),
       'object.paths should be an array');
   goog.asserts.assert(object.paths.length === 1,
       'object.paths array length should be 1');
@@ -185,7 +185,7 @@ ol.format.EsriJSON.readLineStringGeometry_ = function(object) {
  * @return {ol.geom.Geometry} MultiLineString.
  */
 ol.format.EsriJSON.readMultiLineStringGeometry_ = function(object) {
-  goog.asserts.assert(goog.isArray(object.paths),
+  goog.asserts.assert(Array.isArray(object.paths),
       'object.paths should be an array');
   goog.asserts.assert(object.paths.length > 1,
       'object.paths array length should be more than 1');
diff --git a/src/ol/format/featureformat.js b/src/ol/format/featureformat.js
index 43de17c15c..e031bbc5d3 100644
--- a/src/ol/format/featureformat.js
+++ b/src/ol/format/featureformat.js
@@ -203,7 +203,7 @@ ol.format.Feature.transformWithOptions = function(
       return coordinates;
     };
     if (Array.isArray(transformed)) {
-      transform(/** @type {ol.Extent} */ (transformed));
+      transform(transformed);
     } else {
       transformed.applyTransform(transform);
     }
diff --git a/src/ol/format/gml/gml2format.js b/src/ol/format/gml/gml2format.js
index 74943de1de..087253e740 100644
--- a/src/ol/format/gml/gml2format.js
+++ b/src/ol/format/gml/gml2format.js
@@ -130,7 +130,7 @@ ol.format.GML2.prototype.innerBoundaryIsParser_ = function(node, objectStack) {
   if (flatLinearRing) {
     var flatLinearRings = /** @type {Array.<Array.<number>>} */
         (objectStack[objectStack.length - 1]);
-    goog.asserts.assert(goog.isArray(flatLinearRings),
+    goog.asserts.assert(Array.isArray(flatLinearRings),
         'flatLinearRings should be an array');
     goog.asserts.assert(flatLinearRings.length > 0,
         'flatLinearRings should have an array length larger than 0');
@@ -155,7 +155,7 @@ ol.format.GML2.prototype.outerBoundaryIsParser_ = function(node, objectStack) {
   if (flatLinearRing) {
     var flatLinearRings = /** @type {Array.<Array.<number>>} */
         (objectStack[objectStack.length - 1]);
-    goog.asserts.assert(goog.isArray(flatLinearRings),
+    goog.asserts.assert(Array.isArray(flatLinearRings),
         'flatLinearRings should be an array');
     goog.asserts.assert(flatLinearRings.length > 0,
         'flatLinearRings should have an array length larger than 0');
diff --git a/src/ol/format/gml/gml3format.js b/src/ol/format/gml/gml3format.js
index d6520546e9..f8362433ff 100644
--- a/src/ol/format/gml/gml3format.js
+++ b/src/ol/format/gml/gml3format.js
@@ -247,7 +247,7 @@ ol.format.GML3.prototype.interiorParser_ = function(node, objectStack) {
   if (flatLinearRing) {
     var flatLinearRings = /** @type {Array.<Array.<number>>} */
         (objectStack[objectStack.length - 1]);
-    goog.asserts.assert(goog.isArray(flatLinearRings),
+    goog.asserts.assert(Array.isArray(flatLinearRings),
         'flatLinearRings should be an array');
     goog.asserts.assert(flatLinearRings.length > 0,
         'flatLinearRings should have an array length of 1 or more');
@@ -272,7 +272,7 @@ ol.format.GML3.prototype.exteriorParser_ = function(node, objectStack) {
   if (flatLinearRing) {
     var flatLinearRings = /** @type {Array.<Array.<number>>} */
         (objectStack[objectStack.length - 1]);
-    goog.asserts.assert(goog.isArray(flatLinearRings),
+    goog.asserts.assert(Array.isArray(flatLinearRings),
         'flatLinearRings should be an array');
     goog.asserts.assert(flatLinearRings.length > 0,
         'flatLinearRings should have an array length of 1 or more');
@@ -1006,7 +1006,7 @@ ol.format.GML3.prototype.writeGeometryElement = function(node, geometry, objectS
   var item = ol.object.assign({}, context);
   item.node = node;
   var value;
-  if (goog.isArray(geometry)) {
+  if (Array.isArray(geometry)) {
     if (context.dataProjection) {
       value = ol.proj.transformExtent(
           geometry, context.featureProjection, context.dataProjection);
@@ -1233,7 +1233,7 @@ ol.format.GML3.prototype.GEOMETRY_NODE_FACTORY_ = function(value, objectStack, o
   goog.asserts.assert(ol.xml.isNode(parentNode),
       'parentNode should be a node');
   var nodeName;
-  if (!goog.isArray(value)) {
+  if (!Array.isArray(value)) {
     goog.asserts.assertInstanceof(value, ol.geom.Geometry,
         'value should be an ol.geom.Geometry');
     nodeName = value.getType();
diff --git a/src/ol/format/gml/gmlbaseformat.js b/src/ol/format/gml/gmlbaseformat.js
index 64d0fe914d..c09891056c 100644
--- a/src/ol/format/gml/gmlbaseformat.js
+++ b/src/ol/format/gml/gmlbaseformat.js
@@ -163,7 +163,7 @@ ol.format.GMLBase.prototype.readFeaturesInternal = function(node, objectStack) {
       featureNS[defaultPrefix] = ns;
     }
     var parsersNS = {};
-    var featureTypes = goog.isArray(featureType) ? featureType : [featureType];
+    var featureTypes = Array.isArray(featureType) ? featureType : [featureType];
     for (var p in featureNS) {
       var parsers = {};
       for (i = 0, ii = featureTypes.length; i < ii; ++i) {
diff --git a/src/ol/format/kmlformat.js b/src/ol/format/kmlformat.js
index f7cc7fe3d9..c068ba1100 100644
--- a/src/ol/format/kmlformat.js
+++ b/src/ol/format/kmlformat.js
@@ -426,7 +426,7 @@ ol.format.KML.createFeatureStyleFunction_ = function(style, styleUrl,
  * @private
  */
 ol.format.KML.findStyle_ = function(styleValue, defaultStyle, sharedStyles) {
-  if (goog.isArray(styleValue)) {
+  if (Array.isArray(styleValue)) {
     return styleValue;
   } else if (typeof styleValue === 'string') {
     // KML files in the wild occasionally forget the leading `#` on styleUrls
@@ -1267,7 +1267,7 @@ ol.format.KML.PlacemarkStyleMapParser_ = function(node, objectStack) {
   var placemarkObject = objectStack[objectStack.length - 1];
   goog.asserts.assert(goog.isObject(placemarkObject),
       'placemarkObject should be an Object');
-  if (goog.isArray(styleMapValue)) {
+  if (Array.isArray(styleMapValue)) {
     placemarkObject['Style'] = styleMapValue;
   } else if (typeof styleMapValue === 'string') {
     placemarkObject['styleUrl'] = styleMapValue;
@@ -1327,7 +1327,7 @@ ol.format.KML.innerBoundaryIsParser_ = function(node, objectStack) {
   if (flatLinearRing) {
     var flatLinearRings = /** @type {Array.<Array.<number>>} */
         (objectStack[objectStack.length - 1]);
-    goog.asserts.assert(goog.isArray(flatLinearRings),
+    goog.asserts.assert(Array.isArray(flatLinearRings),
         'flatLinearRings should be an array');
     goog.asserts.assert(flatLinearRings.length > 0,
         'flatLinearRings array should not be empty');
@@ -1352,7 +1352,7 @@ ol.format.KML.outerBoundaryIsParser_ = function(node, objectStack) {
   if (flatLinearRing) {
     var flatLinearRings = /** @type {Array.<Array.<number>>} */
         (objectStack[objectStack.length - 1]);
-    goog.asserts.assert(goog.isArray(flatLinearRings),
+    goog.asserts.assert(Array.isArray(flatLinearRings),
         'flatLinearRings should be an array');
     goog.asserts.assert(flatLinearRings.length > 0,
         'flatLinearRings array should not be empty');
@@ -2386,7 +2386,7 @@ ol.format.KML.writePlacemark_ = function(node, feature, objectStack) {
     // resolution-independent here
     var styles = styleFunction.call(feature, 0);
     if (styles) {
-      var style = goog.isArray(styles) ? styles[0] : styles;
+      var style = Array.isArray(styles) ? styles[0] : styles;
       if (this.writeStyles_) {
         properties['Style'] = style;
       }
diff --git a/src/ol/format/wfsformat.js b/src/ol/format/wfsformat.js
index 6c6e16303d..c9f1633b86 100644
--- a/src/ol/format/wfsformat.js
+++ b/src/ol/format/wfsformat.js
@@ -664,7 +664,7 @@ ol.format.WFS.prototype.writeGetFeature = function(options) {
     bbox: options.bbox,
     propertyNames: options.propertyNames ? options.propertyNames : []
   };
-  goog.asserts.assert(goog.isArray(options.featureTypes),
+  goog.asserts.assert(Array.isArray(options.featureTypes),
       'options.featureTypes should be an array');
   ol.format.WFS.writeGetFeature_(node, options.featureTypes, [context]);
   return node;
diff --git a/src/ol/layer/layergroup.js b/src/ol/layer/layergroup.js
index 3307a0ae82..24ef53260c 100644
--- a/src/ol/layer/layergroup.js
+++ b/src/ol/layer/layergroup.js
@@ -61,7 +61,7 @@ ol.layer.Group = function(opt_options) {
       this.handleLayersChanged_, this);
 
   if (layers) {
-    if (goog.isArray(layers)) {
+    if (Array.isArray(layers)) {
       layers = new ol.Collection(layers.slice());
     } else {
       goog.asserts.assertInstanceof(layers, ol.Collection,
diff --git a/src/ol/map.js b/src/ol/map.js
index eb1bd4ca3c..c0bec0d241 100644
--- a/src/ol/map.js
+++ b/src/ol/map.js
@@ -1515,7 +1515,7 @@ ol.Map.createOptionsInternal = function(options) {
    */
   var rendererTypes;
   if (options.renderer !== undefined) {
-    if (goog.isArray(options.renderer)) {
+    if (Array.isArray(options.renderer)) {
       rendererTypes = options.renderer;
     } else if (typeof options.renderer === 'string') {
       rendererTypes = [options.renderer];
@@ -1550,7 +1550,7 @@ ol.Map.createOptionsInternal = function(options) {
 
   var controls;
   if (options.controls !== undefined) {
-    if (goog.isArray(options.controls)) {
+    if (Array.isArray(options.controls)) {
       controls = new ol.Collection(options.controls.slice());
     } else {
       goog.asserts.assertInstanceof(options.controls, ol.Collection,
@@ -1563,7 +1563,7 @@ ol.Map.createOptionsInternal = function(options) {
 
   var interactions;
   if (options.interactions !== undefined) {
-    if (goog.isArray(options.interactions)) {
+    if (Array.isArray(options.interactions)) {
       interactions = new ol.Collection(options.interactions.slice());
     } else {
       goog.asserts.assertInstanceof(options.interactions, ol.Collection,
@@ -1576,7 +1576,7 @@ ol.Map.createOptionsInternal = function(options) {
 
   var overlays;
   if (options.overlays !== undefined) {
-    if (goog.isArray(options.overlays)) {
+    if (Array.isArray(options.overlays)) {
       overlays = new ol.Collection(options.overlays.slice());
     } else {
       goog.asserts.assertInstanceof(options.overlays, ol.Collection,
diff --git a/src/ol/overlay.js b/src/ol/overlay.js
index 22e6378bee..72e5c62b10 100644
--- a/src/ol/overlay.js
+++ b/src/ol/overlay.js
@@ -505,7 +505,7 @@ ol.Overlay.prototype.updateRenderedPosition = function(pixel, mapSize) {
   goog.asserts.assert(mapSize !== undefined, 'mapSize should be defined');
   var style = this.element_.style;
   var offset = this.getOffset();
-  goog.asserts.assert(goog.isArray(offset), 'offset should be an array');
+  goog.asserts.assert(Array.isArray(offset), 'offset should be an array');
 
   var positioning = this.getPositioning();
   goog.asserts.assert(positioning !== undefined,
diff --git a/src/ol/renderer/canvas/canvasvectorlayerrenderer.js b/src/ol/renderer/canvas/canvasvectorlayerrenderer.js
index d87dc6250f..579c7afc80 100644
--- a/src/ol/renderer/canvas/canvasvectorlayerrenderer.js
+++ b/src/ol/renderer/canvas/canvasvectorlayerrenderer.js
@@ -328,7 +328,7 @@ ol.renderer.canvas.VectorLayer.prototype.renderFeature = function(feature, resol
     return false;
   }
   var loading = false;
-  if (goog.isArray(styles)) {
+  if (Array.isArray(styles)) {
     for (var i = 0, ii = styles.length; i < ii; ++i) {
       loading = ol.renderer.vector.renderFeature(
           replayGroup, feature, styles[i],
diff --git a/src/ol/renderer/canvas/canvasvectortilelayerrenderer.js b/src/ol/renderer/canvas/canvasvectortilelayerrenderer.js
index 3fa67c1908..51a39fa76c 100644
--- a/src/ol/renderer/canvas/canvasvectortilelayerrenderer.js
+++ b/src/ol/renderer/canvas/canvasvectortilelayerrenderer.js
@@ -264,7 +264,7 @@ ol.renderer.canvas.VectorTileLayer.prototype.createReplayGroup = function(tile,
       }
     }
     if (styles) {
-      if (!goog.isArray(styles)) {
+      if (!Array.isArray(styles)) {
         styles = [styles];
       }
       var dirty = this.renderFeature(feature, squaredTolerance, styles,
@@ -495,7 +495,7 @@ ol.renderer.canvas.VectorTileLayer.prototype.renderFeature = function(feature, s
     return false;
   }
   var loading = false;
-  if (goog.isArray(styles)) {
+  if (Array.isArray(styles)) {
     for (var i = 0, ii = styles.length; i < ii; ++i) {
       loading = ol.renderer.vector.renderFeature(
           replayGroup, feature, styles[i], squaredTolerance,
diff --git a/src/ol/renderer/dom/domvectorlayerrenderer.js b/src/ol/renderer/dom/domvectorlayerrenderer.js
index 30bae5161c..d025ef6103 100644
--- a/src/ol/renderer/dom/domvectorlayerrenderer.js
+++ b/src/ol/renderer/dom/domvectorlayerrenderer.js
@@ -338,7 +338,7 @@ ol.renderer.dom.VectorLayer.prototype.renderFeature = function(feature, resoluti
     return false;
   }
   var loading = false;
-  if (goog.isArray(styles)) {
+  if (Array.isArray(styles)) {
     for (var i = 0, ii = styles.length; i < ii; ++i) {
       loading = ol.renderer.vector.renderFeature(
           replayGroup, feature, styles[i],
diff --git a/src/ol/renderer/webgl/webglvectorlayerrenderer.js b/src/ol/renderer/webgl/webglvectorlayerrenderer.js
index 96ddf4136d..4f4cf4deed 100644
--- a/src/ol/renderer/webgl/webglvectorlayerrenderer.js
+++ b/src/ol/renderer/webgl/webglvectorlayerrenderer.js
@@ -298,7 +298,7 @@ ol.renderer.webgl.VectorLayer.prototype.renderFeature = function(feature, resolu
     return false;
   }
   var loading = false;
-  if (goog.isArray(styles)) {
+  if (Array.isArray(styles)) {
     for (var i = 0, ii = styles.length; i < ii; ++i) {
       loading = ol.renderer.vector.renderFeature(
           replayGroup, feature, styles[i],
diff --git a/src/ol/size.js b/src/ol/size.js
index 2dba83bb72..5e73a5b7ac 100644
--- a/src/ol/size.js
+++ b/src/ol/size.js
@@ -78,7 +78,7 @@ ol.size.scale = function(size, ratio, opt_size) {
  * @api stable
  */
 ol.size.toSize = function(size, opt_size) {
-  if (goog.isArray(size)) {
+  if (Array.isArray(size)) {
     return size;
   } else {
     goog.asserts.assert(goog.isNumber(size));
diff --git a/src/ol/source/imagevectorsource.js b/src/ol/source/imagevectorsource.js
index 97c02e34d6..228fa8e905 100644
--- a/src/ol/source/imagevectorsource.js
+++ b/src/ol/source/imagevectorsource.js
@@ -264,7 +264,7 @@ ol.source.ImageVector.prototype.renderFeature_ = function(feature, resolution, p
     return false;
   }
   var i, ii, loading = false;
-  if (!goog.isArray(styles)) {
+  if (!Array.isArray(styles)) {
     styles = [styles];
   }
   for (i = 0, ii = styles.length; i < ii; ++i) {
diff --git a/src/ol/source/vectorsource.js b/src/ol/source/vectorsource.js
index e40de37d66..b00d7acefa 100644
--- a/src/ol/source/vectorsource.js
+++ b/src/ol/source/vectorsource.js
@@ -172,7 +172,7 @@ ol.source.Vector = function(opt_options) {
   if (options.features instanceof ol.Collection) {
     collection = options.features;
     features = collection.getArray();
-  } else if (goog.isArray(options.features)) {
+  } else if (Array.isArray(options.features)) {
     features = options.features;
   }
   if (!useSpatialIndex && collection === undefined) {
diff --git a/src/ol/style/style.js b/src/ol/style/style.js
index 1e037366ef..b0b2119138 100644
--- a/src/ol/style/style.js
+++ b/src/ol/style/style.js
@@ -223,7 +223,7 @@ ol.style.createStyleFunction = function(obj) {
      * @type {Array.<ol.style.Style>}
      */
     var styles;
-    if (goog.isArray(obj)) {
+    if (Array.isArray(obj)) {
       styles = obj;
     } else {
       goog.asserts.assertInstanceof(obj, ol.style.Style,
diff --git a/src/ol/view.js b/src/ol/view.js
index 9bec014084..68a384448d 100644
--- a/src/ol/view.js
+++ b/src/ol/view.js
@@ -447,7 +447,7 @@ ol.View.prototype.getZoom = function() {
  */
 ol.View.prototype.fit = function(geometry, size, opt_options) {
   if (!(geometry instanceof ol.geom.SimpleGeometry)) {
-    goog.asserts.assert(goog.isArray(geometry),
+    goog.asserts.assert(Array.isArray(geometry),
         'invalid extent or geometry');
     goog.asserts.assert(!ol.extent.isEmpty(geometry),
         'cannot fit empty extent');
diff --git a/src/ol/xml.js b/src/ol/xml.js
index 3a14ac5419..c4556fdf84 100644
--- a/src/ol/xml.js
+++ b/src/ol/xml.js
@@ -156,11 +156,11 @@ ol.xml.makeArrayExtender = function(valueReader, opt_this) {
       function(node, objectStack) {
         var value = valueReader.call(opt_this, node, objectStack);
         if (value !== undefined) {
-          goog.asserts.assert(goog.isArray(value),
+          goog.asserts.assert(Array.isArray(value),
               'valueReader function is expected to return an array of values');
           var array = /** @type {Array.<*>} */
               (objectStack[objectStack.length - 1]);
-          goog.asserts.assert(goog.isArray(array),
+          goog.asserts.assert(Array.isArray(array),
               'objectStack is supposed to be an array of arrays');
           ol.array.extend(array, value);
         }
@@ -187,7 +187,7 @@ ol.xml.makeArrayPusher = function(valueReader, opt_this) {
             node, objectStack);
         if (value !== undefined) {
           var array = objectStack[objectStack.length - 1];
-          goog.asserts.assert(goog.isArray(array),
+          goog.asserts.assert(Array.isArray(array),
               'objectStack is supposed to be an array of arrays');
           array.push(value);
         }