Real-Time User Tracking with Phoenix Presence and LiveView

In modern web applications, showing who is online and what they are doing in real time is a core feature for collaboration and engagement. Building these features can be complex, but Phoenix Presence provides a robust, distributed system to handle user state seamlessly. This text-based course guides you through the foundational concepts of real-time state tracking, showing you how to monitor user activity without overloading your database or server. You will learn to implement live user lists, activity indicators, and collaborative features using Elixir and Phoenix. What you'll learn: - Understand the core architecture of Phoenix Presence, PubSub, and LiveView. - Track user connections, disconnections, and metadata across distributed nodes. - Implement live online-user lists that update instantly as users join or leave. - Apply modern Phoenix LiveView component patterns to render real-time state. - Manage state efficiently with Conflict-Free Replicated Data Types (CRDTs) underlying Presence. - Configure secure tracking that respects user privacy and application performance. You will start by mastering foundational real-time web concepts and Elixir processes. Then, you will progress to configuring Presence, broadcasting updates via PubSub, and rendering live state changes directly in the browser using clean, modern LiveView patterns. This course is designed for web developers new to real-time features or Phoenix. No prior experience with Phoenix Presence is required, though a basic familiarity with Elixir and HTML will help you get the most out of the written lessons and code examples. Start reading today to build highly interactive, real-time user experiences with Phoenix.