Improving User Experience in Phoenix LiveView with a Loading Spinner

When building Phoenix applications using LiveView, developers often face situations where requests take more time to process. These could be due to data processing tasks, external API calls, or slow database queries. To improve the user experience during these delays, Luiz Cezer demonstrates how to add a spinner that is displayed while data is being loaded. In this tutorial, he outlines a simple scenario where a button initiates a simulated delayed operation, and a spinner appears to inform the user that data is loading. The implementation involves assigning a loading state in the LiveView's mount function and controlling the visibility of the spinner through a conditional in the template. Additionally, a backend handle_event function triggers the spinner and sends a message to the process to load data asynchronously. Once the data is loaded, the spinner is hidden, and the data is presented to the user. The complete code for this example is available on GitHub.