The answer
requestAnimationFrame (animations), queueMicrotask (urgent work), requestIdleCallback (low-priority work), scheduler.postTask (prioritized scheduling), async/await (async flow), and Web Workers (heavy computation).
Alternatives to setTimeout in Modern JavaScript
What are modern alternatives to setTimeout?
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For animations and visual DOM updates. requestAnimationFrame syncs with the browser's refresh rate, runs before the next paint, and pauses when the tab is hidden.
A newer API for prioritized task scheduling. You can specify priorities: user-blocking, user-visible, or background. Use it when you need fine-grained control over task priority.
A callback that runs when the browser is idle (between frames). The deadline object tells you how much time is left. Use it for low-priority work like analytics and pre-fetching.
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