I am trying to dynamically add and remove UI elements to a python shiny application. For adding elements I want to have a generic "Add element" button. For removal however, I want to have an individual "X" button at the corner of each element. Adding elements already works as it should. I am currently struggling with observing the clicks on each individual "X" button. The code I have currently is this: from shiny import App, ui, reactive # Define the UI app_ui = ui.page_fluid( ui.input_action_button("add_square", "Add Square", class_="btn btn-primary"), ui.div(id="square_container", class_="container"), ui.tags.style( """ .rounded-square { width: 120px; height: 120px; background-color: #f9f9f9; /* Light gray background */ border-radius: 15%; display: flex; justify-content: center; align-items: center; margin: 10px; box-shadow: 0px 4px 8px rgba(0, 0, 0, 0.1); position: relative; } .container { display: flex; flex-wrap: wrap; gap: 15px; margin-top: 20px; justify-content: center; } .delete-btn { position: absolute; top: 5px; right: 5px; background-color: #ff4d4d; color: white; border: none; border-radius: 50%; width: 20px; height: 20px; font-size: 12px; cursor: pointer; text-align: center; line-height: 17px; padding: 0; } .delete-btn:hover { background-color: #e60000; } """ ), ) # Define the server logic def server(input, output, session): # Reactive list to store square IDs square_ids = reactive.Value([]) @reactive.Effect @reactive.event(input.add_square) def add_square(): """Add a new square dynamically.""" current_ids = square_ids.get() # Generate a new unique ID for the square new_id = max(current_ids, default=0) + 1 current_ids.append(new_id) square_ids.set(current_ids) # Add a new square dynamically into the DOM ui.insert_ui( ui=ui.div( ui.TagList( ui.input_text( f"text_{new_id}", None, placeholder=f"Square {new_id}" ), ui.input_action_button( f"delete_{new_id}", "X", class_="delete-btn" ), ), id=f"square_{new_id}", # Unique ID for the square class_="rounded-square", ), selector="#square_container", # Add inside the container where="beforeEnd", ) @reactive.effect def monitor_delete_buttons(): """Monitor delete button clicks and handle square deletions.""" current_ids = square_ids.get() for square_id in current_ids: # Check if the delete button for `square_id` has been clicked if input.get(f"delete_{square_id}", 0) > 0: # Remove the square from the UI ui.remove_ui(selector=f"#square_{square_id}") # Update the reactive square list updated_ids = [s for s in current_ids if s != square_id] square_ids.set(updated_ids) # Reset the delete input to avoid duplicate actions session.reset_input(f"delete_{square_id}") break # Create the Shiny app app = App(app_ui, server) Continue reading...