Elixir LiveView: Stateful Real-Time Clock

This component is a masterclass in Server-Side Synchronicity. By utilizing Erlang’s :timer module to send periodic :tick messages to the LiveView process, I maintain a persistent WebSocket connection that streams updates every second.

The server remains the absolute source of truth, calculating and formatting the time directly in Elixir before pushing minimal data packets.

By leveraging LiveView’s diff-patching, only the specific changed timestamp is updated in the browser, achieving high-frequency UI synchronization with Zero JavaScript Dependencies—proving how the BEAM can eliminate entire layers of traditional frontend logic.