Editor: default canvas fills preview area like iframe

Author: pepc84

editor/index.html

@@ -69,7 +69,7 @@
       background: #111;
       overflow: hidden;
     }
-    #preview-area canvas { display: block !important; }
+    #preview-area canvas { display: block !important; width: 100% !important; height: 100% !important; }
     #preview-area iframe { width: 100%; height: 100%; border: none; display: block; }
 
     #preview-placeholder { color: #555; font-size: 13px; text-align: center; line-height: 2.2; }
@@ -269,6 +269,8 @@
   const canvas = document.createElement('canvas');
   canvas.id = 'canvas';
   canvas.style.display = 'block';
+  canvas.style.width = '100%';
+  canvas.style.height = '100%';
 
   area.appendChild(canvas);
   window.Module = {