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