From cfa9718df9e0978fa162400e4849137f167f571e Mon Sep 17 00:00:00 2001
From: Guillaume Beraudo <guillaume.beraudo@camptocamp.com>
Date: Wed, 28 Feb 2018 23:22:18 +0100
Subject: [PATCH 1/3] Remove window prefix

The prefix is unnecessary and prevent usage in web workers.
---
 src/ol/render/canvas.js | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/ol/render/canvas.js b/src/ol/render/canvas.js
index b0c94f6ba4..98734a9659 100644
--- a/src/ol/render/canvas.js
+++ b/src/ol/render/canvas.js
@@ -167,7 +167,7 @@ export const checkFont = (function() {
       }
     }
     if (done) {
-      window.clearInterval(interval);
+      clearInterval(interval);
       interval = undefined;
     }
   }
@@ -184,7 +184,7 @@ export const checkFont = (function() {
         if (!isAvailable(fontFamily)) {
           checked[fontFamily] = 0;
           if (interval === undefined) {
-            interval = window.setInterval(check, 32);
+            interval = setInterval(check, 32);
           }
         }
       }

From f9a27805468754f2e1927a8b95c0f18b01f97c50 Mon Sep 17 00:00:00 2001
From: Guillaume Beraudo <guillaume.beraudo@camptocamp.com>
Date: Wed, 28 Feb 2018 23:24:53 +0100
Subject: [PATCH 2/3] Do not assume window is defined

It is notably not the case in web workers.
---
 src/ol/index.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/ol/index.js b/src/ol/index.js
index f2e44acc19..377d594239 100644
--- a/src/ol/index.js
+++ b/src/ol/index.js
@@ -41,7 +41,7 @@ let WEBGL_EXTENSIONS; // value is set below
 let HAS_WEBGL = false;
 
 
-if ('WebGLRenderingContext' in window) {
+if (typeof window !== 'undefined' && 'WebGLRenderingContext' in window) {
   try {
     const canvas = /** @type {HTMLCanvasElement} */
         (document.createElement('CANVAS'));

From 628094166977799d15e0d21ac6b47eb9862006d1 Mon Sep 17 00:00:00 2001
From: Guillaume Beraudo <guillaume.beraudo@camptocamp.com>
Date: Wed, 28 Feb 2018 23:28:38 +0100
Subject: [PATCH 3/3] Remove window prefix from event listener functions

---
 src/ol/PluggableMap.js | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/src/ol/PluggableMap.js b/src/ol/PluggableMap.js
index 36780ba8cd..5a20cc4187 100644
--- a/src/ol/PluggableMap.js
+++ b/src/ol/PluggableMap.js
@@ -507,7 +507,7 @@ PluggableMap.prototype.disposeInternal = function() {
   unlisten(this.viewport_, EventType.MOUSEWHEEL,
     this.handleBrowserEvent, this);
   if (this.handleResize_ !== undefined) {
-    window.removeEventListener(EventType.RESIZE,
+    removeEventListener(EventType.RESIZE,
       this.handleResize_, false);
     this.handleResize_ = undefined;
   }
@@ -1012,7 +1012,7 @@ PluggableMap.prototype.handleTargetChanged_ = function() {
     this.renderer_.removeLayerRenderers();
     removeNode(this.viewport_);
     if (this.handleResize_ !== undefined) {
-      window.removeEventListener(EventType.RESIZE,
+      removeEventListener(EventType.RESIZE,
         this.handleResize_, false);
       this.handleResize_ = undefined;
     }
@@ -1030,7 +1030,7 @@ PluggableMap.prototype.handleTargetChanged_ = function() {
 
     if (!this.handleResize_) {
       this.handleResize_ = this.updateSize.bind(this);
-      window.addEventListener(EventType.RESIZE,
+      addEventListener(EventType.RESIZE,
         this.handleResize_, false);
     }
   }