🚀 Just launched Cosmic APOD V3! (Zero-backend, 100% Vanilla JS)

Hey everyone! 👋 A while back, I wanted a faster, more modern way to explore NASA’s Astronomy Picture of the Day (APOD) archive. Today, I’m super excited to share Cosmic APOD V3!

I challenged myself to build this entirely without a backend. It’s just Vite and Vanilla JS, but it packs some serious features using browser-native APIs.

✨ What’s new in V3?

• 🤖 Local AI Tagging: I integrated TensorFlow.js (MobileNet) to generate image tags directly in your browser via WebGL. No server processing, completely private, and the 1.8MB model is lazy-loaded so the app stays blazing fast.
• 🔗 Shareable Collections: You can curate your favorite APODs and share them with friends. Because there’s no database, the collections are serialized into Base64 URLs! When someone clicks your link, they get a custom preview modal before importing it into their local IndexedDB.
• 📅 Date-Range Explorer: Batch-fetch and paginate through decades of space history without locking up the browser.
• 🚦 Smart API Limits: NASA limits you to 30 requests/hour. V3 elegantly catches HTTP 429s and lets power users plug in their own API key via localStorage to unlock 1,000 requests/hour.

I’ve learned so much about AbortControllers, IndexedDB, Service Workers, and client-side ML while building this.

If you’re interested in offline-first web apps or space, I’d love for you to check it out and let me know what you think! 🌌

🔗 Live Demo: [https://cosmic-apod.vercel.app]
💻 GitHub: [https://github.com/gauravkhatriweb/cosmic-apod]