Update app.py

app.py

@@ -470,12 +470,18 @@ app_ui = ui.page_fluid(
                                         useCORS: true,
                                         backgroundColor: '#ffffff',
                                         windowWidth: document.getElementById('capture-div').scrollWidth,
-                                        windowHeight: document.getElementById('capture-div').scrollHeight
+                                        windowHeight: document.getElementById('capture-div').scrollHeight,
+                                        imageTimeout: 0,
+                                        removeContainer: true
                                     }).then(function(canvas) {
                                         var link = document.createElement('a');
                                         link.download = 'nhl-streamers.png';
-                                        link.href = canvas.toDataURL('image/png');
+                                        link.href = canvas.toDataURL('image/png', 1.0);
+                                        document.body.appendChild(link);
                                         link.click();
+                                        document.body.removeChild(link);
+                                    }).catch(function(err) {
+                                        console.error('Error:', err);
                                     });
                                 """},
                                 {"style": "margin: 10px 0;"}