diff --git a/examples/canvas-gradient-pattern.js b/examples/canvas-gradient-pattern.js
index 1e64f3e363..e38ee0e43e 100644
--- a/examples/canvas-gradient-pattern.js
+++ b/examples/canvas-gradient-pattern.js
@@ -2,7 +2,7 @@ import Map from '../src/ol/Map.js';
 import View from '../src/ol/View.js';
 import * as _ol_extent_ from '../src/ol/extent.js';
 import GeoJSON from '../src/ol/format/GeoJSON.js';
-import _ol_has_ from '../src/ol/has.js';
+import {DEVICE_PIXEL_RATIO} from '../src/ol/has.js';
 import VectorLayer from '../src/ol/layer/Vector.js';
 import {fromLonLat} from '../src/ol/proj.js';
 import VectorSource from '../src/ol/source/Vector.js';
@@ -15,7 +15,7 @@ const context = canvas.getContext('2d');
 
 // Gradient and pattern are in canvas pixel space, so we adjust for the
 // renderer's pixel ratio
-const pixelRatio = _ol_has_.DEVICE_PIXEL_RATIO;
+const pixelRatio = DEVICE_PIXEL_RATIO;
 
 // Generate a rainbow gradient
 function gradient(feature, resolution) {
diff --git a/examples/layer-clipping-webgl.js b/examples/layer-clipping-webgl.js
index 24241abf3d..a2c6e7f1db 100644
--- a/examples/layer-clipping-webgl.js
+++ b/examples/layer-clipping-webgl.js
@@ -1,11 +1,11 @@
 import Map from '../src/ol/Map.js';
 import View from '../src/ol/View.js';
 import {defaults as defaultControls} from '../src/ol/control.js';
-import _ol_has_ from '../src/ol/has.js';
+import {WEBGL} from '../src/ol/has.js';
 import TileLayer from '../src/ol/layer/Tile.js';
 import OSM from '../src/ol/source/OSM.js';
 
-if (!_ol_has_.WEBGL) {
+if (!WEBGL) {
   const info = document.getElementById('no-webgl');
   /**
    * display error message
diff --git a/examples/side-by-side.js b/examples/side-by-side.js
index 090aa8b736..11022381d9 100644
--- a/examples/side-by-side.js
+++ b/examples/side-by-side.js
@@ -1,6 +1,6 @@
 import Map from '../src/ol/Map.js';
 import View from '../src/ol/View.js';
-import _ol_has_ from '../src/ol/has.js';
+import {WEBGL} from '../src/ol/has.js';
 import TileLayer from '../src/ol/layer/Tile.js';
 import OSM from '../src/ol/source/OSM.js';
 
@@ -19,7 +19,7 @@ const map1 = new Map({
   view: view
 });
 
-if (_ol_has_.WEBGL) {
+if (WEBGL) {
   const map2 = new Map({
     target: 'webglMap',
     renderer: /** @type {Array<ol.renderer.Type>} */ (['webgl', 'canvas']),
diff --git a/examples/wmts-hidpi.js b/examples/wmts-hidpi.js
index db07e35650..27255c8110 100644
--- a/examples/wmts-hidpi.js
+++ b/examples/wmts-hidpi.js
@@ -1,7 +1,7 @@
 import Map from '../src/ol/Map.js';
 import View from '../src/ol/View.js';
 import WMTSCapabilities from '../src/ol/format/WMTSCapabilities.js';
-import _ol_has_ from '../src/ol/has.js';
+import {DEVICE_PIXEL_RATIO} from '../src/ol/has.js';
 import TileLayer from '../src/ol/layer/Tile.js';
 import WMTS from '../src/ol/source/WMTS.js';
 
@@ -11,7 +11,7 @@ const capabilitiesUrl = 'https://www.basemap.at/wmts/1.0.0/WMTSCapabilities.xml'
 // HiDPI support:
 // * Use 'bmaphidpi' layer (pixel ratio 2) for device pixel ratio > 1
 // * Use 'geolandbasemap' layer (pixel ratio 1) for device pixel ratio == 1
-const hiDPI = _ol_has_.DEVICE_PIXEL_RATIO > 1;
+const hiDPI = DEVICE_PIXEL_RATIO > 1;
 const layer = hiDPI ? 'bmaphidpi' : 'geolandbasemap';
 const tilePixelRatio = hiDPI ? 2 : 1;
 
diff --git a/src/ol/Geolocation.js b/src/ol/Geolocation.js
index 4b4cea52c7..d9fac464e7 100644
--- a/src/ol/Geolocation.js
+++ b/src/ol/Geolocation.js
@@ -7,7 +7,7 @@ import BaseObject from './Object.js';
 import {listen} from './events.js';
 import EventType from './events/EventType.js';
 import {circular as circularPolygon} from './geom/Polygon.js';
-import _ol_has_ from './has.js';
+import {GEOLOCATION} from './has.js';
 import {toRadians} from './math.js';
 import {get as getProjection, getTransformFromProjections, identityTransform} from './proj.js';
 
@@ -127,7 +127,7 @@ Geolocation.prototype.handleProjectionChanged_ = function() {
  * @private
  */
 Geolocation.prototype.handleTrackingChanged_ = function() {
-  if (_ol_has_.GEOLOCATION) {
+  if (GEOLOCATION) {
     const tracking = this.getTracking();
     if (tracking && this.watchId_ === undefined) {
       this.watchId_ = navigator.geolocation.watchPosition(
diff --git a/src/ol/MapBrowserEventHandler.js b/src/ol/MapBrowserEventHandler.js
index 97388edd46..aaf905c765 100644
--- a/src/ol/MapBrowserEventHandler.js
+++ b/src/ol/MapBrowserEventHandler.js
@@ -2,7 +2,7 @@
  * @module ol/MapBrowserEventHandler
  */
 import {inherits} from './index.js';
-import _ol_has_ from './has.js';
+import {DEVICE_PIXEL_RATIO} from './has.js';
 import MapBrowserEventType from './MapBrowserEventType.js';
 import MapBrowserPointerEvent from './MapBrowserPointerEvent.js';
 import {listen, unlistenByKey} from './events.js';
@@ -50,7 +50,7 @@ const MapBrowserEventHandler = function(map, moveTolerance) {
    * @private
    */
   this.moveTolerance_ = moveTolerance ?
-    moveTolerance * _ol_has_.DEVICE_PIXEL_RATIO : _ol_has_.DEVICE_PIXEL_RATIO;
+    moveTolerance * DEVICE_PIXEL_RATIO : DEVICE_PIXEL_RATIO;
 
   /**
    * The most recent "down" type event (or null if none have occurred).
diff --git a/src/ol/PluggableMap.js b/src/ol/PluggableMap.js
index 99163b3c22..9f60a5df3a 100644
--- a/src/ol/PluggableMap.js
+++ b/src/ol/PluggableMap.js
@@ -22,7 +22,7 @@ import Event from './events/Event.js';
 import EventType from './events/EventType.js';
 import {createEmpty, clone, createOrUpdateEmpty, equals, getForViewAndSize, isEmpty} from './extent.js';
 import {TRUE} from './functions.js';
-import _ol_has_ from './has.js';
+import {DEVICE_PIXEL_RATIO, TOUCH} from './has.js';
 import LayerGroup from './layer/Group.js';
 import {getMapRendererPlugins} from './plugins.js';
 import RendererType from './renderer/Type.js';
@@ -136,7 +136,7 @@ const PluggableMap = function(options) {
    * @type {number}
    */
   this.pixelRatio_ = options.pixelRatio !== undefined ?
-    options.pixelRatio : _ol_has_.DEVICE_PIXEL_RATIO;
+    options.pixelRatio : DEVICE_PIXEL_RATIO;
 
   /**
    * @private
@@ -206,7 +206,7 @@ const PluggableMap = function(options) {
    * @type {Element}
    */
   this.viewport_ = document.createElement('DIV');
-  this.viewport_.className = 'ol-viewport' + (_ol_has_.TOUCH ? ' ol-touch' : '');
+  this.viewport_.className = 'ol-viewport' + (TOUCH ? ' ol-touch' : '');
   this.viewport_.style.position = 'relative';
   this.viewport_.style.overflow = 'hidden';
   this.viewport_.style.width = '100%';
diff --git a/src/ol/events/condition.js b/src/ol/events/condition.js
index 9c31d9123a..c09ba57778 100644
--- a/src/ol/events/condition.js
+++ b/src/ol/events/condition.js
@@ -4,7 +4,7 @@
 import MapBrowserEventType from '../MapBrowserEventType.js';
 import {assert} from '../asserts.js';
 import {TRUE, FALSE} from '../functions.js';
-import _ol_has_ from '../has.js';
+import {WEBKIT, MAC} from '../has.js';
 const _ol_events_condition_ = {};
 
 
@@ -77,7 +77,7 @@ _ol_events_condition_.click = function(mapBrowserEvent) {
 _ol_events_condition_.mouseActionButton = function(mapBrowserEvent) {
   const originalEvent = mapBrowserEvent.originalEvent;
   return originalEvent.button == 0 &&
-      !(_ol_has_.WEBKIT && _ol_has_.MAC && originalEvent.ctrlKey);
+      !(WEBKIT && MAC && originalEvent.ctrlKey);
 };
 
 
@@ -158,7 +158,7 @@ _ol_events_condition_.noModifierKeys = function(mapBrowserEvent) {
 _ol_events_condition_.platformModifierKeyOnly = function(mapBrowserEvent) {
   const originalEvent = mapBrowserEvent.originalEvent;
   return !originalEvent.altKey &&
-    (_ol_has_.MAC ? originalEvent.metaKey : originalEvent.ctrlKey) &&
+    (MAC ? originalEvent.metaKey : originalEvent.ctrlKey) &&
     !originalEvent.shiftKey;
 };
 
diff --git a/src/ol/has.js b/src/ol/has.js
index 86e4b2cf30..fd7a2a6d28 100644
--- a/src/ol/has.js
+++ b/src/ol/has.js
@@ -3,8 +3,6 @@
  */
 import {HAS_WEBGL} from './index.js';
 
-const _ol_has_ = {};
-
 const ua = typeof navigator !== 'undefined' ?
   navigator.userAgent.toLowerCase() : '';
 
@@ -12,25 +10,25 @@ const ua = typeof navigator !== 'undefined' ?
  * User agent string says we are dealing with Firefox as browser.
  * @type {boolean}
  */
-_ol_has_.FIREFOX = ua.indexOf('firefox') !== -1;
+export const FIREFOX = ua.indexOf('firefox') !== -1;
 
 /**
  * User agent string says we are dealing with Safari as browser.
  * @type {boolean}
  */
-_ol_has_.SAFARI = ua.indexOf('safari') !== -1 && ua.indexOf('chrom') == -1;
+export const SAFARI = ua.indexOf('safari') !== -1 && ua.indexOf('chrom') == -1;
 
 /**
  * User agent string says we are dealing with a WebKit engine.
  * @type {boolean}
  */
-_ol_has_.WEBKIT = ua.indexOf('webkit') !== -1 && ua.indexOf('edge') == -1;
+export const WEBKIT = ua.indexOf('webkit') !== -1 && ua.indexOf('edge') == -1;
 
 /**
  * User agent string says we are dealing with a Mac as platform.
  * @type {boolean}
  */
-_ol_has_.MAC = ua.indexOf('macintosh') !== -1;
+export const MAC = ua.indexOf('macintosh') !== -1;
 
 
 /**
@@ -40,44 +38,22 @@ _ol_has_.MAC = ua.indexOf('macintosh') !== -1;
  * @type {number}
  * @api
  */
-_ol_has_.DEVICE_PIXEL_RATIO = window.devicePixelRatio || 1;
+export const DEVICE_PIXEL_RATIO = window.devicePixelRatio || 1;
 
 
 /**
  * True if the browser's Canvas implementation implements {get,set}LineDash.
  * @type {boolean}
  */
-_ol_has_.CANVAS_LINE_DASH = false;
-
-
-/**
- * True if the and browsers support Canvas.
- * @const
- * @type {boolean}
- * @api
- */
-_ol_has_.CANVAS = (
-  /**
-   * @return {boolean} Canvas supported.
-   */
-  function() {
-    if (!('HTMLCanvasElement' in window)) {
-      return false;
-    }
-    try {
-      const context = document.createElement('CANVAS').getContext('2d');
-      if (!context) {
-        return false;
-      } else {
-        if (context.setLineDash !== undefined) {
-          _ol_has_.CANVAS_LINE_DASH = true;
-        }
-        return true;
-      }
-    } catch (e) {
-      return false;
-    }
-  })();
+export const CANVAS_LINE_DASH = function() {
+  let has = false;
+  try {
+    has = !!document.createElement('CANVAS').getContext('2d').setLineDash;
+  } catch (e) {
+    // pass
+  }
+  return has;
+}();
 
 
 /**
@@ -86,7 +62,7 @@ _ol_has_.CANVAS = (
  * @type {boolean}
  * @api
  */
-_ol_has_.GEOLOCATION = 'geolocation' in navigator;
+export const GEOLOCATION = 'geolocation' in navigator;
 
 
 /**
@@ -95,7 +71,7 @@ _ol_has_.GEOLOCATION = 'geolocation' in navigator;
  * @type {boolean}
  * @api
  */
-_ol_has_.TOUCH = 'ontouchstart' in window;
+export const TOUCH = 'ontouchstart' in window;
 
 
 /**
@@ -103,7 +79,7 @@ _ol_has_.TOUCH = 'ontouchstart' in window;
  * @const
  * @type {boolean}
  */
-_ol_has_.POINTER = 'PointerEvent' in window;
+export const POINTER = 'PointerEvent' in window;
 
 
 /**
@@ -111,7 +87,7 @@ _ol_has_.POINTER = 'PointerEvent' in window;
  * @const
  * @type {boolean}
  */
-_ol_has_.MSPOINTER = !!(navigator.msPointerEnabled);
+export const MSPOINTER = !!(navigator.msPointerEnabled);
 
 
 /**
@@ -120,7 +96,4 @@ _ol_has_.MSPOINTER = !!(navigator.msPointerEnabled);
  * @type {boolean}
  * @api
  */
-_ol_has_.WEBGL = HAS_WEBGL;
-
-
-export default _ol_has_;
+export const WEBGL = HAS_WEBGL;
diff --git a/src/ol/interaction/MouseWheelZoom.js b/src/ol/interaction/MouseWheelZoom.js
index 020b5a29fc..f3e0856e8f 100644
--- a/src/ol/interaction/MouseWheelZoom.js
+++ b/src/ol/interaction/MouseWheelZoom.js
@@ -6,7 +6,7 @@ import ViewHint from '../ViewHint.js';
 import condition from '../events/condition.js';
 import {easeOut} from '../easing.js';
 import EventType from '../events/EventType.js';
-import _ol_has_ from '../has.js';
+import {DEVICE_PIXEL_RATIO, FIREFOX, SAFARI} from '../has.js';
 import Interaction from '../interaction/Interaction.js';
 import {clamp} from '../math.js';
 
@@ -156,16 +156,16 @@ MouseWheelZoom.handleEvent = function(mapBrowserEvent) {
   let delta;
   if (mapBrowserEvent.type == EventType.WHEEL) {
     delta = wheelEvent.deltaY;
-    if (_ol_has_.FIREFOX &&
+    if (FIREFOX &&
         wheelEvent.deltaMode === WheelEvent.DOM_DELTA_PIXEL) {
-      delta /= _ol_has_.DEVICE_PIXEL_RATIO;
+      delta /= DEVICE_PIXEL_RATIO;
     }
     if (wheelEvent.deltaMode === WheelEvent.DOM_DELTA_LINE) {
       delta *= 40;
     }
   } else if (mapBrowserEvent.type == EventType.MOUSEWHEEL) {
     delta = -wheelEvent.wheelDeltaY;
-    if (_ol_has_.SAFARI) {
+    if (SAFARI) {
       delta /= 3;
     }
   }
diff --git a/src/ol/pointer/PointerEventHandler.js b/src/ol/pointer/PointerEventHandler.js
index 13d3cae55d..3de077dc25 100644
--- a/src/ol/pointer/PointerEventHandler.js
+++ b/src/ol/pointer/PointerEventHandler.js
@@ -34,7 +34,7 @@
 import {inherits} from '../index.js';
 import {listen, unlisten} from '../events.js';
 import EventTarget from '../events/EventTarget.js';
-import _ol_has_ from '../has.js';
+import {POINTER, MSPOINTER, TOUCH} from '../has.js';
 import PointerEventType from '../pointer/EventType.js';
 import MouseSource from '../pointer/MouseSource.js';
 import MsSource from '../pointer/MsSource.js';
@@ -86,15 +86,15 @@ inherits(PointerEventHandler, EventTarget);
  * that generate pointer events.
  */
 PointerEventHandler.prototype.registerSources = function() {
-  if (_ol_has_.POINTER) {
+  if (POINTER) {
     this.registerSource('native', new NativeSource(this));
-  } else if (_ol_has_.MSPOINTER) {
+  } else if (MSPOINTER) {
     this.registerSource('ms', new MsSource(this));
   } else {
     const mouseSource = new MouseSource(this);
     this.registerSource('mouse', mouseSource);
 
-    if (_ol_has_.TOUCH) {
+    if (TOUCH) {
       this.registerSource('touch', new TouchSource(this, mouseSource));
     }
   }
diff --git a/src/ol/render.js b/src/ol/render.js
index 40a997821d..4e07812871 100644
--- a/src/ol/render.js
+++ b/src/ol/render.js
@@ -1,7 +1,7 @@
 /**
  * @module ol/render
  */
-import _ol_has_ from './has.js';
+import {DEVICE_PIXEL_RATIO} from './has.js';
 import _ol_transform_ from './transform.js';
 import CanvasImmediateRenderer from './render/canvas/Immediate.js';
 
@@ -29,7 +29,7 @@ import CanvasImmediateRenderer from './render/canvas/Immediate.js';
 export function toContext(context, opt_options) {
   const canvas = context.canvas;
   const options = opt_options ? opt_options : {};
-  const pixelRatio = options.pixelRatio || _ol_has_.DEVICE_PIXEL_RATIO;
+  const pixelRatio = options.pixelRatio || DEVICE_PIXEL_RATIO;
   const size = options.size;
   if (size) {
     canvas.width = size[0] * pixelRatio;
diff --git a/src/ol/render/canvas/Immediate.js b/src/ol/render/canvas/Immediate.js
index eb47de06d0..a02919714e 100644
--- a/src/ol/render/canvas/Immediate.js
+++ b/src/ol/render/canvas/Immediate.js
@@ -12,7 +12,7 @@ import {intersects} from '../../extent.js';
 import GeometryType from '../../geom/GeometryType.js';
 import SimpleGeometry from '../../geom/SimpleGeometry.js';
 import _ol_geom_flat_transform_ from '../../geom/flat/transform.js';
-import _ol_has_ from '../../has.js';
+import {CANVAS_LINE_DASH} from '../../has.js';
 import VectorContext from '../VectorContext.js';
 import _ol_render_canvas_ from '../canvas.js';
 import _ol_transform_ from '../../transform.js';
@@ -728,7 +728,7 @@ CanvasImmediateRenderer.prototype.setContextStrokeState_ = function(strokeState)
   const contextStrokeState = this.contextStrokeState_;
   if (!contextStrokeState) {
     context.lineCap = strokeState.lineCap;
-    if (_ol_has_.CANVAS_LINE_DASH) {
+    if (CANVAS_LINE_DASH) {
       context.setLineDash(strokeState.lineDash);
       context.lineDashOffset = strokeState.lineDashOffset;
     }
@@ -749,7 +749,7 @@ CanvasImmediateRenderer.prototype.setContextStrokeState_ = function(strokeState)
     if (contextStrokeState.lineCap != strokeState.lineCap) {
       contextStrokeState.lineCap = context.lineCap = strokeState.lineCap;
     }
-    if (_ol_has_.CANVAS_LINE_DASH) {
+    if (CANVAS_LINE_DASH) {
       if (!equals(contextStrokeState.lineDash, strokeState.lineDash)) {
         context.setLineDash(contextStrokeState.lineDash = strokeState.lineDash);
       }
diff --git a/src/ol/render/canvas/Replay.js b/src/ol/render/canvas/Replay.js
index bd79447504..6040f66905 100644
--- a/src/ol/render/canvas/Replay.js
+++ b/src/ol/render/canvas/Replay.js
@@ -12,7 +12,7 @@ import _ol_geom_flat_inflate_ from '../../geom/flat/inflate.js';
 import _ol_geom_flat_length_ from '../../geom/flat/length.js';
 import _ol_geom_flat_textpath_ from '../../geom/flat/textpath.js';
 import _ol_geom_flat_transform_ from '../../geom/flat/transform.js';
-import _ol_has_ from '../../has.js';
+import {CANVAS_LINE_DASH} from '../../has.js';
 import {isEmpty} from '../../obj.js';
 import VectorContext from '../VectorContext.js';
 import _ol_render_canvas_ from '../canvas.js';
@@ -479,7 +479,7 @@ CanvasReplay.prototype.setStrokeStyle_ = function(context, instruction) {
   context.lineCap = /** @type {string} */ (instruction[3]);
   context.lineJoin = /** @type {string} */ (instruction[4]);
   context.miterLimit = /** @type {number} */ (instruction[5]);
-  if (_ol_has_.CANVAS_LINE_DASH) {
+  if (CANVAS_LINE_DASH) {
     context.lineDashOffset = /** @type {number} */ (instruction[7]);
     context.setLineDash(/** @type {Array.<number>} */ (instruction[6]));
   }
diff --git a/src/ol/render/canvas/TextReplay.js b/src/ol/render/canvas/TextReplay.js
index 2cd45db4f7..f24b19a6c6 100644
--- a/src/ol/render/canvas/TextReplay.js
+++ b/src/ol/render/canvas/TextReplay.js
@@ -7,7 +7,7 @@ import {createCanvasContext2D} from '../../dom.js';
 import {intersects} from '../../extent.js';
 import _ol_geom_flat_straightchunk_ from '../../geom/flat/straightchunk.js';
 import GeometryType from '../../geom/GeometryType.js';
-import _ol_has_ from '../../has.js';
+import {CANVAS_LINE_DASH, SAFARI} from '../../has.js';
 import _ol_render_canvas_ from '../canvas.js';
 import CanvasInstruction from '../canvas/Instruction.js';
 import CanvasReplay from '../canvas/Replay.js';
@@ -314,11 +314,11 @@ CanvasTextReplay.prototype.getImage = function(text, textKey, fillKey, strokeKey
     context.font = textState.font;
     if (strokeKey) {
       context.strokeStyle = strokeState.strokeStyle;
-      context.lineWidth = strokeWidth * (_ol_has_.SAFARI ? scale : 1);
+      context.lineWidth = strokeWidth * (SAFARI ? scale : 1);
       context.lineCap = strokeState.lineCap;
       context.lineJoin = strokeState.lineJoin;
       context.miterLimit = strokeState.miterLimit;
-      if (_ol_has_.CANVAS_LINE_DASH && strokeState.lineDash.length) {
+      if (CANVAS_LINE_DASH && strokeState.lineDash.length) {
         context.setLineDash(strokeState.lineDash);
         context.lineDashOffset = strokeState.lineDashOffset;
       }
diff --git a/src/ol/render/webgl/TextReplay.js b/src/ol/render/webgl/TextReplay.js
index 19025633dd..44fc733c72 100644
--- a/src/ol/render/webgl/TextReplay.js
+++ b/src/ol/render/webgl/TextReplay.js
@@ -5,7 +5,7 @@ import {getUid, inherits} from '../../index.js';
 import {asColorLike} from '../../colorlike.js';
 import {createCanvasContext2D} from '../../dom.js';
 import GeometryType from '../../geom/GeometryType.js';
-import _ol_has_ from '../../has.js';
+import {CANVAS_LINE_DASH} from '../../has.js';
 import _ol_render_replay_ from '../replay.js';
 import _ol_render_webgl_ from '../webgl.js';
 import WebGLTextureReplay from '../webgl/TextureReplay.js';
@@ -269,7 +269,7 @@ WebGLTextReplay.prototype.addCharToAtlas_ = function(char) {
         ctx.miterLimit = /** @type {number} */ (state.miterLimit);
         ctx.textAlign = 'left';
         ctx.textBaseline = 'top';
-        if (_ol_has_.CANVAS_LINE_DASH && state.lineDash) {
+        if (CANVAS_LINE_DASH && state.lineDash) {
           //FIXME: use pixelRatio
           ctx.setLineDash(state.lineDash);
           ctx.lineDashOffset = /** @type {number} */ (state.lineDashOffset);
diff --git a/src/ol/renderer/webgl/Map.js b/src/ol/renderer/webgl/Map.js
index 6fdd2dba8b..bb35235993 100644
--- a/src/ol/renderer/webgl/Map.js
+++ b/src/ol/renderer/webgl/Map.js
@@ -7,7 +7,7 @@ import {stableSort} from '../../array.js';
 import {CLASS_UNSELECTABLE} from '../../css.js';
 import {createCanvasContext2D} from '../../dom.js';
 import {listen} from '../../events.js';
-import _ol_has_ from '../../has.js';
+import {WEBGL} from '../../has.js';
 import Layer from '../../layer/Layer.js';
 import RenderEvent from '../../render/Event.js';
 import RenderEventType from '../../render/EventType.js';
@@ -175,7 +175,7 @@ inherits(WebGLMapRenderer, MapRenderer);
  * @return {boolean} The renderer can render the layer.
  */
 WebGLMapRenderer['handles'] = function(type) {
-  return _ol_has_.WEBGL && type === RendererType.WEBGL;
+  return WEBGL && type === RendererType.WEBGL;
 };
 
 
diff --git a/src/ol/style/RegularShape.js b/src/ol/style/RegularShape.js
index 547c1229c3..47a122a03e 100644
--- a/src/ol/style/RegularShape.js
+++ b/src/ol/style/RegularShape.js
@@ -4,7 +4,7 @@
 import {inherits} from '../index.js';
 import {asColorLike} from '../colorlike.js';
 import {createCanvasContext2D} from '../dom.js';
-import _ol_has_ from '../has.js';
+import {CANVAS_LINE_DASH} from '../has.js';
 import ImageState from '../ImageState.js';
 import _ol_render_canvas_ from '../render/canvas.js';
 import ImageStyle from '../style/Image.js';
@@ -334,7 +334,7 @@ RegularShape.prototype.render_ = function(atlasManager) {
     }
     lineDash = this.stroke_.getLineDash();
     lineDashOffset = this.stroke_.getLineDashOffset();
-    if (!_ol_has_.CANVAS_LINE_DASH) {
+    if (!CANVAS_LINE_DASH) {
       lineDash = null;
       lineDashOffset = 0;
     }
diff --git a/test/spec/ol/interaction/mousewheelzoom.test.js b/test/spec/ol/interaction/mousewheelzoom.test.js
index 31322ceeee..f52eb23cae 100644
--- a/test/spec/ol/interaction/mousewheelzoom.test.js
+++ b/test/spec/ol/interaction/mousewheelzoom.test.js
@@ -2,7 +2,7 @@ import Map from '../../../../src/ol/Map.js';
 import MapBrowserEvent from '../../../../src/ol/MapBrowserEvent.js';
 import View from '../../../../src/ol/View.js';
 import Event from '../../../../src/ol/events/Event.js';
-import _ol_has_ from '../../../../src/ol/has.js';
+import {DEVICE_PIXEL_RATIO, FIREFOX, SAFARI} from '../../../../src/ol/has.js';
 import Interaction from '../../../../src/ol/interaction/Interaction.js';
 import MouseWheelZoom from '../../../../src/ol/interaction/MouseWheelZoom.js';
 
@@ -62,43 +62,41 @@ describe('ol.interaction.MouseWheelZoom', function() {
 
   describe('handleEvent()', function() {
 
-    it('works on Firefox in DOM_DELTA_PIXEL mode (trackpad)', function(done) {
-      const origHasFirefox = _ol_has_.FIREFOX;
-      _ol_has_.FIREFOX = true;
-      map.once('postrender', function() {
-        expect(interaction.mode_).to.be(MouseWheelZoom.Mode_.TRACKPAD);
-        _ol_has_.FIREFOX = origHasFirefox;
-        done();
+    if (FIREFOX) {
+      it('works on Firefox in DOM_DELTA_PIXEL mode (trackpad)', function(done) {
+        map.once('postrender', function() {
+          expect(interaction.mode_).to.be(MouseWheelZoom.Mode_.TRACKPAD);
+          done();
+        });
+        const event = new MapBrowserEvent('wheel', map, {
+          type: 'wheel',
+          deltaMode: WheelEvent.DOM_DELTA_PIXEL,
+          deltaY: DEVICE_PIXEL_RATIO,
+          target: map.getViewport(),
+          preventDefault: Event.prototype.preventDefault
+        });
+        event.coordinate = [0, 0];
+        map.handleMapBrowserEvent(event);
       });
-      const event = new MapBrowserEvent('wheel', map, {
-        type: 'wheel',
-        deltaMode: WheelEvent.DOM_DELTA_PIXEL,
-        deltaY: _ol_has_.DEVICE_PIXEL_RATIO,
-        target: map.getViewport(),
-        preventDefault: Event.prototype.preventDefault
-      });
-      event.coordinate = [0, 0];
-      map.handleMapBrowserEvent(event);
-    });
+    }
 
-    it('works in DOM_DELTA_PIXEL mode (trackpad)', function(done) {
-      const origHasFirefox = _ol_has_.FIREFOX;
-      _ol_has_.FIREFOX = false;
-      map.once('postrender', function() {
-        expect(interaction.mode_).to.be(MouseWheelZoom.Mode_.TRACKPAD);
-        _ol_has_.FIREFOX = origHasFirefox;
-        done();
+    if (!FIREFOX) {
+      it('works in DOM_DELTA_PIXEL mode (trackpad)', function(done) {
+        map.once('postrender', function() {
+          expect(interaction.mode_).to.be(MouseWheelZoom.Mode_.TRACKPAD);
+          done();
+        });
+        const event = new MapBrowserEvent('wheel', map, {
+          type: 'wheel',
+          deltaMode: WheelEvent.DOM_DELTA_PIXEL,
+          deltaY: 1,
+          target: map.getViewport(),
+          preventDefault: Event.prototype.preventDefault
+        });
+        event.coordinate = [0, 0];
+        map.handleMapBrowserEvent(event);
       });
-      const event = new MapBrowserEvent('wheel', map, {
-        type: 'wheel',
-        deltaMode: WheelEvent.DOM_DELTA_PIXEL,
-        deltaY: 1,
-        target: map.getViewport(),
-        preventDefault: Event.prototype.preventDefault
-      });
-      event.coordinate = [0, 0];
-      map.handleMapBrowserEvent(event);
-    });
+    }
 
     describe('spying on ol.interaction.Interaction.zoomByDelta', function() {
       beforeEach(function() {
@@ -126,45 +124,43 @@ describe('ol.interaction.MouseWheelZoom', function() {
         map.handleMapBrowserEvent(event);
       });
 
-      it('works on Safari (wheel)', function(done) {
-        const origHasSafari = _ol_has_.SAFARI;
-        _ol_has_.SAFARI = true;
-        map.once('postrender', function() {
-          const call = Interaction.zoomByDelta.getCall(0);
-          expect(call.args[1]).to.be(-1);
-          expect(call.args[2]).to.eql([0, 0]);
-          _ol_has_.SAFARI = origHasSafari;
-          done();
+      if (SAFARI) {
+        it('works on Safari (wheel)', function(done) {
+          map.once('postrender', function() {
+            const call = Interaction.zoomByDelta.getCall(0);
+            expect(call.args[1]).to.be(-1);
+            expect(call.args[2]).to.eql([0, 0]);
+            done();
+          });
+          const event = new MapBrowserEvent('mousewheel', map, {
+            type: 'mousewheel',
+            wheelDeltaY: -50,
+            target: map.getViewport(),
+            preventDefault: Event.prototype.preventDefault
+          });
+          event.coordinate = [0, 0];
+          map.handleMapBrowserEvent(event);
         });
-        const event = new MapBrowserEvent('mousewheel', map, {
-          type: 'mousewheel',
-          wheelDeltaY: -50,
-          target: map.getViewport(),
-          preventDefault: Event.prototype.preventDefault
-        });
-        event.coordinate = [0, 0];
-        map.handleMapBrowserEvent(event);
-      });
+      }
 
-      it('works on other browsers (wheel)', function(done) {
-        const origHasSafari = _ol_has_.SAFARI;
-        _ol_has_.SAFARI = false;
-        map.once('postrender', function() {
-          const call = Interaction.zoomByDelta.getCall(0);
-          expect(call.args[1]).to.be(-1);
-          expect(call.args[2]).to.eql([0, 0]);
-          _ol_has_.SAFARI = origHasSafari;
-          done();
+      if (!SAFARI) {
+        it('works on other browsers (wheel)', function(done) {
+          map.once('postrender', function() {
+            const call = Interaction.zoomByDelta.getCall(0);
+            expect(call.args[1]).to.be(-1);
+            expect(call.args[2]).to.eql([0, 0]);
+            done();
+          });
+          const event = new MapBrowserEvent('mousewheel', map, {
+            type: 'mousewheel',
+            wheelDeltaY: -120,
+            target: map.getViewport(),
+            preventDefault: Event.prototype.preventDefault
+          });
+          event.coordinate = [0, 0];
+          map.handleMapBrowserEvent(event);
         });
-        const event = new MapBrowserEvent('mousewheel', map, {
-          type: 'mousewheel',
-          wheelDeltaY: -120,
-          target: map.getViewport(),
-          preventDefault: Event.prototype.preventDefault
-        });
-        event.coordinate = [0, 0];
-        map.handleMapBrowserEvent(event);
-      });
+      }
 
     });
 
diff --git a/test/spec/ol/map.test.js b/test/spec/ol/map.test.js
index 748032daec..b06cc71bfd 100644
--- a/test/spec/ol/map.test.js
+++ b/test/spec/ol/map.test.js
@@ -4,7 +4,7 @@ import MapEvent from '../../../src/ol/MapEvent.js';
 import Overlay from '../../../src/ol/Overlay.js';
 import View from '../../../src/ol/View.js';
 import LineString from '../../../src/ol/geom/LineString.js';
-import _ol_has_ from '../../../src/ol/has.js';
+import {TOUCH} from '../../../src/ol/has.js';
 import {defaults as defaultInteractions} from '../../../src/ol/interaction.js';
 import DoubleClickZoom from '../../../src/ol/interaction/DoubleClickZoom.js';
 import Interaction from '../../../src/ol/interaction/Interaction.js';
@@ -38,7 +38,7 @@ describe('ol.Map', function() {
     it('creates the viewport', function() {
       const map = new Map({});
       const viewport = map.getViewport();
-      const className = 'ol-viewport' + (_ol_has_.TOUCH ? ' ol-touch' : '');
+      const className = 'ol-viewport' + (TOUCH ? ' ol-touch' : '');
       expect(viewport.className).to.be(className);
     });
 
diff --git a/test/spec/ol/mapbrowserevent.test.js b/test/spec/ol/mapbrowserevent.test.js
index 13a957bd78..64ee2b0a1e 100644
--- a/test/spec/ol/mapbrowserevent.test.js
+++ b/test/spec/ol/mapbrowserevent.test.js
@@ -1,7 +1,7 @@
 import Map from '../../../src/ol/Map.js';
 import MapBrowserEventHandler from '../../../src/ol/MapBrowserEventHandler.js';
 import {listen} from '../../../src/ol/events.js';
-import _ol_has_ from '../../../src/ol/has.js';
+import {DEVICE_PIXEL_RATIO} from '../../../src/ol/has.js';
 import PointerEvent from '../../../src/ol/pointer/PointerEvent.js';
 
 describe('ol.MapBrowserEventHandler', function() {
@@ -139,32 +139,32 @@ describe('ol.MapBrowserEventHandler', function() {
 
     it('is moving if distance is 2', function() {
       const pointerdownAt2 = new PointerEvent('pointerdown', {}, {
-        clientX: _ol_has_.DEVICE_PIXEL_RATIO + 1,
-        clientY: _ol_has_.DEVICE_PIXEL_RATIO + 1
+        clientX: DEVICE_PIXEL_RATIO + 1,
+        clientY: DEVICE_PIXEL_RATIO + 1
       });
       expect(defaultHandler.isMoving_(pointerdownAt2)).to.be(true);
     });
 
     it('is moving with negative distance', function() {
       const pointerdownAt2 = new PointerEvent('pointerdown', {}, {
-        clientX: -(_ol_has_.DEVICE_PIXEL_RATIO + 1),
-        clientY: -(_ol_has_.DEVICE_PIXEL_RATIO + 1)
+        clientX: -(DEVICE_PIXEL_RATIO + 1),
+        clientY: -(DEVICE_PIXEL_RATIO + 1)
       });
       expect(defaultHandler.isMoving_(pointerdownAt2)).to.be(true);
     });
 
     it('is not moving if distance is less than move tolerance', function() {
       const pointerdownAt2 = new PointerEvent('pointerdown', {}, {
-        clientX: _ol_has_.DEVICE_PIXEL_RATIO + 1,
-        clientY: _ol_has_.DEVICE_PIXEL_RATIO + 1
+        clientX: DEVICE_PIXEL_RATIO + 1,
+        clientY: DEVICE_PIXEL_RATIO + 1
       });
       expect(moveToleranceHandler.isMoving_(pointerdownAt2)).to.be(false);
     });
 
     it('is moving if distance is greater than move tolerance', function() {
       const pointerdownAt9 = new PointerEvent('pointerdown', {}, {
-        clientX: (_ol_has_.DEVICE_PIXEL_RATIO * 8) + 1,
-        clientY: (_ol_has_.DEVICE_PIXEL_RATIO * 8) + 1
+        clientX: (DEVICE_PIXEL_RATIO * 8) + 1,
+        clientY: (DEVICE_PIXEL_RATIO * 8) + 1
       });
       expect(moveToleranceHandler.isMoving_(pointerdownAt9)).to.be(true);
     });
diff --git a/test/spec/ol/pointer/mousesource.test.js b/test/spec/ol/pointer/mousesource.test.js
index e2ccd7fe85..3250829375 100644
--- a/test/spec/ol/pointer/mousesource.test.js
+++ b/test/spec/ol/pointer/mousesource.test.js
@@ -1,8 +1,10 @@
 import {listen} from '../../../../src/ol/events.js';
 import EventTarget from '../../../../src/ol/events/EventTarget.js';
-import _ol_has_ from '../../../../src/ol/has.js';
 import PointerEventHandler from '../../../../src/ol/pointer/PointerEventHandler.js';
 import TouchSource from '../../../../src/ol/pointer/TouchSource.js';
+import MouseSource from '../../../../src/ol/pointer/MouseSource.js';
+import MsSource from '../../../../src/ol/pointer/MsSource.js';
+import NativeSource from '../../../../src/ol/pointer/NativeSource.js';
 
 
 describe('ol.pointer.MouseSource', function() {
@@ -16,11 +18,31 @@ describe('ol.pointer.MouseSource', function() {
     target = new EventTarget();
 
     // make sure that a mouse and touch event source is used
-    _ol_has_.POINTER = false;
-    _ol_has_.MSPOINTER = false;
-    _ol_has_.TOUCH = true;
+    const POINTER = false;
+    const MSPOINTER = false;
+    const TOUCH = true;
+    const originalRegisterSources = PointerEventHandler.prototype.registerSources;
+    PointerEventHandler.prototype.registerSources = function() {
+      if (POINTER) {
+        this.registerSource('native', new NativeSource(this));
+      } else if (MSPOINTER) {
+        this.registerSource('ms', new MsSource(this));
+      } else {
+        const mouseSource = new MouseSource(this);
+        this.registerSource('mouse', mouseSource);
+
+        if (TOUCH) {
+          this.registerSource('touch', new TouchSource(this, mouseSource));
+        }
+      }
+
+      // register events on the viewport element
+      this.register_();
+    };
 
     handler = new PointerEventHandler(target);
+    PointerEventHandler.prototype.registerSources = originalRegisterSources;
+
     eventSpy = sinon.spy();
   });
 
diff --git a/test/spec/ol/pointer/pointereventhandler.test.js b/test/spec/ol/pointer/pointereventhandler.test.js
index 8b1e69375d..6075e00891 100644
--- a/test/spec/ol/pointer/pointereventhandler.test.js
+++ b/test/spec/ol/pointer/pointereventhandler.test.js
@@ -1,9 +1,11 @@
 import {listen} from '../../../../src/ol/events.js';
 import EventTarget from '../../../../src/ol/events/EventTarget.js';
-import _ol_has_ from '../../../../src/ol/has.js';
 import MouseSource from '../../../../src/ol/pointer/MouseSource.js';
 import PointerEvent from '../../../../src/ol/pointer/PointerEvent.js';
 import PointerEventHandler from '../../../../src/ol/pointer/PointerEventHandler.js';
+import TouchSource from '../../../../src/ol/pointer/TouchSource.js';
+import MsSource from '../../../../src/ol/pointer/MsSource.js';
+import NativeSource from '../../../../src/ol/pointer/NativeSource.js';
 
 
 describe('ol.pointer.PointerEventHandler', function() {
@@ -15,10 +17,31 @@ describe('ol.pointer.PointerEventHandler', function() {
     target = new EventTarget();
 
     // make sure that a mouse event source is used
-    _ol_has_.POINTER = false;
-    _ol_has_.MSPOINTER = false;
+    const POINTER = false;
+    const MSPOINTER = false;
+    const TOUCH = false;
+    const originalRegisterSources = PointerEventHandler.prototype.registerSources;
+    PointerEventHandler.prototype.registerSources = function() {
+      if (POINTER) {
+        this.registerSource('native', new NativeSource(this));
+      } else if (MSPOINTER) {
+        this.registerSource('ms', new MsSource(this));
+      } else {
+        const mouseSource = new MouseSource(this);
+        this.registerSource('mouse', mouseSource);
+
+        if (TOUCH) {
+          this.registerSource('touch', new TouchSource(this, mouseSource));
+        }
+      }
+
+      // register events on the viewport element
+      this.register_();
+    };
 
     handler = new PointerEventHandler(target);
+    PointerEventHandler.prototype.registerSources = originalRegisterSources;
+
     eventSpy = sinon.spy();
   });
 
diff --git a/test/spec/ol/pointer/touchsource.test.js b/test/spec/ol/pointer/touchsource.test.js
index e36dac4d89..feb0a56713 100644
--- a/test/spec/ol/pointer/touchsource.test.js
+++ b/test/spec/ol/pointer/touchsource.test.js
@@ -1,9 +1,12 @@
 import {listen} from '../../../../src/ol/events.js';
 import Event from '../../../../src/ol/events/Event.js';
 import EventTarget from '../../../../src/ol/events/EventTarget.js';
-import _ol_has_ from '../../../../src/ol/has.js';
 import {assign} from '../../../../src/ol/obj.js';
 import PointerEventHandler from '../../../../src/ol/pointer/PointerEventHandler.js';
+import TouchSource from '../../../../src/ol/pointer/TouchSource.js';
+import MouseSource from '../../../../src/ol/pointer/MouseSource.js';
+import MsSource from '../../../../src/ol/pointer/MsSource.js';
+import NativeSource from '../../../../src/ol/pointer/NativeSource.js';
 
 describe('ol.pointer.TouchSource', function() {
   let handler;
@@ -14,11 +17,31 @@ describe('ol.pointer.TouchSource', function() {
     target = new EventTarget();
 
     // make sure that a mouse and touch event source is used
-    _ol_has_.POINTER = false;
-    _ol_has_.MSPOINTER = false;
-    _ol_has_.TOUCH = true;
+    const POINTER = false;
+    const MSPOINTER = false;
+    const TOUCH = true;
+    const originalRegisterSources = PointerEventHandler.prototype.registerSources;
+    PointerEventHandler.prototype.registerSources = function() {
+      if (POINTER) {
+        this.registerSource('native', new NativeSource(this));
+      } else if (MSPOINTER) {
+        this.registerSource('ms', new MsSource(this));
+      } else {
+        const mouseSource = new MouseSource(this);
+        this.registerSource('mouse', mouseSource);
+
+        if (TOUCH) {
+          this.registerSource('touch', new TouchSource(this, mouseSource));
+        }
+      }
+
+      // register events on the viewport element
+      this.register_();
+    };
 
     handler = new PointerEventHandler(target);
+    PointerEventHandler.prototype.registerSources = originalRegisterSources;
+
     eventSpy = sinon.spy();
   });
 
diff --git a/test/spec/ol/render.test.js b/test/spec/ol/render.test.js
index 991d722f84..1c1a55ddeb 100644
--- a/test/spec/ol/render.test.js
+++ b/test/spec/ol/render.test.js
@@ -1,5 +1,5 @@
 import {equals} from '../../../src/ol/array.js';
-import _ol_has_ from '../../../src/ol/has.js';
+import {DEVICE_PIXEL_RATIO} from '../../../src/ol/has.js';
 import {toContext} from '../../../src/ol/render.js';
 import CanvasImmediateRenderer from '../../../src/ol/render/canvas/Immediate.js';
 import _ol_transform_ from '../../../src/ol/transform.js';
@@ -13,7 +13,7 @@ describe('ol.render', function() {
       const canvas = document.createElement('canvas');
       const render = toContext(canvas.getContext('2d'));
       expect(render).to.be.a(CanvasImmediateRenderer);
-      expect(render.pixelRatio_).to.be(_ol_has_.DEVICE_PIXEL_RATIO);
+      expect(render.pixelRatio_).to.be(DEVICE_PIXEL_RATIO);
     });
 
     it('sets size and pixel ratio from options', function() {
diff --git a/test/test-extensions.js b/test/test-extensions.js
index ccc9ca729c..e8e39ef19d 100644
--- a/test/test-extensions.js
+++ b/test/test-extensions.js
@@ -1,5 +1,5 @@
 import {equals} from '../src/ol/array.js';
-import _ol_has_ from '../src/ol/has.js';
+import {WEBGL} from '../src/ol/has.js';
 // avoid importing anything that results in an instanceof check
 // since these extensions are global, instanceof checks fail with modules
 
@@ -377,7 +377,7 @@ import _ol_has_ from '../src/ol/has.js';
   };
 
   global.assertWebGL = function(map) {
-    if (!_ol_has_.WEBGL) {
+    if (!WEBGL) {
       expect().fail('No WebGL support!');
     }
   };