Understanding the appropriate use of handle_params callback

Herminio Torres explains the function of the handle_params/3 callback within Phoenix LiveView, emphasizing its role in utilizing URL states to manage the presentation layer of a LiveView application. The callback, which executes subsequent to the mount function or during a live navigation event, ensures that the application can maintain its state via the URL, enabling consistent views across shared links. Torres provides an illustration on handling different types of URL states, such as pagination, filtering, and sorting, and details how handle_params/3 can be triggered server-side using push_patch/2, or through client-side interactions via live_patch/2. To demonstrate this, a code snippet shows the handling of URL parameters to fetch and display items based on pagination, filtering, and sorting criteria, contributing to a dynamic and stateful user interface.