Fix for canvas background bug in Chromium

js/Game.js

@@ -214,7 +214,7 @@ export class Game
             this.canvas.style.backgroundImage = 'none';
         }
 
-        this.canvas.style.backgroundColor = this.level.getBackgroundColor();
+        document.body.style.backgroundColor = this.level.getBackgroundColor();
         this.canvas.width = window.innerWidth;
         this.canvas.height = window.innerHeight;
 

tilorswift/js/module.js

@@ -6,6 +6,13 @@ import Setting from "../../js/Setting.js";
 
 const imageLoader = new ImageLoader();
 
+window.addEventListener(
+    'beforeunload',
+    (event) => {
+        event.preventDefault();
+    }
+);
+
 for (const graphicSet of GraphicSet) {
     imageLoader.addImage('../' + Setting.TILESET_LOCATION + graphicSet.tileset);