Angular Custom Pipe | Build a relative time pipe (Pure vs Impure Explained)

Most developers use Angular custom pipes correctly… until they don’t. In this video, we uncover the hidden performance mistake that happens when working with custom pipes — especially in real-world scenarios like time-based formatting (e.g., “5 minutes ago”). You’ll clearly understand: • How pure pipes actually work • Why impure pipes can silently hurt performance • Why some custom pipes don’t auto-update • The modern Angular 17+ way to handle time-based logic • When you should NOT use a pipe at all If you're serious about writing performance-friendly Angular applications, understanding pure vs impure pipes is essential. This video focuses on practical, real-world Angular patterns — not just syntax. Github Repo: https://github.com/amit-1826/poster/tree/ng-tutorial-12-custom-pipes Built-in pipes: https://youtu.be/Xb99W78IfQs ----------------------------------------------------------------------------------------------------- 🔥 *Welcome to Frontend Forge — Your Ultimate Angular + Frontend Learning Hub!* If you want to master Angular from *Beginner → Advanced*, understand real-world concepts, explore new Angular features, and use AI to speed up your development workflow, you're in the right place. Here on Frontend Forge, we upload: ✨ Angular 17–20 Tutorials ⚙️ Deep Dives into Components, Directives, Pipes, Control Flow & Signals 🧠 AI-powered Angular Development Tricks 💡 Best Practices, Performance Tips & Real-World Examples 🚀 Interview Questions & Practical Coding Scenarios ⚡ Quick Angular Shorts (“Angular in 60 Seconds”) 👨‍💻 Frontend Productivity Tips If you’re preparing for interviews, building enterprise apps, or leveling up your Angular skills, *hit Subscribe and join the Forge!* 🔔🔥 --- ## 🔗 *Connect With Frontend Forge* 📌 *WhatsApp Channel:* http://whatsapp.com/channel/0029VbBQMVxDTkJvnD4Chz0t 📌 *GitHub Repo:* https://github.com/amit-1826/ 📌 *Instagram / LinkedIn (if any):* https://www.instagram.com/front_end_forge/ --- ## 🔥 *Playlists to Explore* 🎥 https://www.youtube.com/playlist?list=PLacjmGXbedw1S0zsrjxZeJxU7nxnwSxUx 🎥 https://www.youtube.com/playlist?list=PLacjmGXbedw1hdMDCC5rFhHYQKHDkbk_r 🎥 https://www.youtube.com/playlist?list=PLacjmGXbedw2OPQ2eft63O0DCvNIUdg-7 🎥 https://www.youtube.com/playlist?list=PLacjmGXbedw20zM7GA3OvwWpyEAudq_Y2 --- ## ❤️ *Support the Channel* Like, Comment & Subscribe! Your support helps me create even better Angular content for the community. #angularpipes #angular #webdevelopment