fix viewer (playcanvas#1957)

slimbuck · Donovan Hutchence · web-flow · commit c0f02878fa43 · 2020-04-01T17:04:16.000+01:00
Co-authored-by: Donovan Hutchence &lt;dhutchence@snapchat.com&gt;
diff --git a/tools/glb-viewer/src/viewer.js b/tools/glb-viewer/src/viewer.js
@@ -311,8 +311,10 @@ Object.assign(Viewer.prototype, {
 
 /* eslint-disable no-unused-vars */
 
+var viewer;
+
 var main = function () {
-    var viewer = new Viewer(document.getElementById("application-canvas"));
+    viewer = new Viewer(document.getElementById("application-canvas"));
 };
 
 /* eslint-enable no-unused-vars */
