Update viewer.js

viewer.js

@@ -73,6 +73,12 @@ export async function initializeViewer(config, instanceId) {
   canvas.addEventListener('dblclick', e => e.preventDefault());
   canvas.addEventListener('touchstart', e => { if (e.touches.length > 1) e.preventDefault(); }, { passive: false });
 
+  // --- The following line attaches mouse wheel suppression to canvas only ---
+  // (You can remove this if PlayCanvas script already handles it via canvas events)
+  canvas.addEventListener('wheel', (e) => {
+    e.preventDefault(); // Only block page scroll if mouse is over viewer
+  }, { passive: false });
+
   progressDialog.style.display = 'block';
 
   if (!pc) {
@@ -91,8 +97,10 @@ export async function initializeViewer(config, instanceId) {
 
   const opts = new pc.AppOptions();
   opts.graphicsDevice = device;
-  opts.mouse = new pc.Mouse(document.body);
-  opts.touch = new pc.TouchDevice(document.body);
+  // ----------- PATCH: Attach input only to canvas (not document.body) -----------
+  opts.mouse = new pc.Mouse(canvas);
+  opts.touch = new pc.TouchDevice(canvas);
+  // ------------------------------------------------------------------------------
   opts.componentSystems = [
     pc.RenderComponentSystem,
     pc.CameraComponentSystem,