requestAnimationFrame vs requestIdleCallback

The primary difference between (rAF) and (rIC) is priority and timing within the browser's event loop. Key Differences Feature (rAF) (rIC) Priority High: Critical for visual updates. Low: Non-critical background tasks. Timing Executes before the next repaint/refresh. Executes during idle periods at the end of a frame. Frequency Matches display refresh rate (usually 60Hz). Unpredictable; depends on CPU availability. Best For Animations, UI transitions, and DOM changes. Analytics, background data