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How to Fix Scroll Lag on Heavy Javascript Sites | Bushe.co

person Patrick Bushe ยท calendar_today May 1, 2026

Single Page Applications (SPAs) built with React or Angular are notoriously heavy. If the site is aggressively re-rendering virtual DOM nodes, scrolling will inevitably stutter as the CPU maxes out. To definitively fix scroll lag on heavy Javascript sites, implement the Smooth Scrolling extension. It actively prioritizes the scrolling animation in the rendering queue. By forcing the browser to calculate the pan before recalculating the Javascript layout, the visual navigation remains uninterrupted despite the bogged-down backend.

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