Prevent unintended network requests and interface conflicts by properly controlling event propagation in interactive elements. Use `event.stopImmediatePropagation()` when multiple event listeners on the same element or its ancestors could trigger conflicting network operations. This is particularly important when: - Form submissions or network requests could be triggered by event bubbling - Multiple components handle the same event type and could interfere with each other - Autocomplete or similar features need to prevent default browser behavior Example: ```javascript case "Enter": case "Tab": event.preventDefault(); event.stopImmediatePropagation(); // Prevents other listeners from triggering unwanted network calls ``` Consider binding events to the most appropriate element level rather than relying on event bubbling, especially for network-triggering operations like prefetching or form submissions. This reduces the risk of unintended network activity and improves code maintainability.