🚀 Make Heavy JavaScript Non-Blocking — 7 Battle-Tested Patterns (2025)

Your UI runs on a single thread.

A single heavy task = blocked input, choppy scroll, angry users.

This practical guide shows 7 ways to slice up heavy logic without freezing the browser:

• setTimeout() loops ✅
• await scheduler.postTask() for precision ⏳
• requestAnimationFrame() for frame-aware execution
• Web Workers for offloading entirely 🚀
• Even MessageChannel for micro-delay control

🎯 Clear examples, pros/cons, and when to use each.

📘 Keep your app snappy in 2025 — start here: https://levelup.gitconnected.com/keep-the-ui-smooth-7-ways-to-slice-heavy-javascript-work-2025-guide-c52bca03165e