Quick Answer
Advanced scrolling behaviors: parallax (update transform on scroll, throttled), sticky elements (Intersection Observer on sentinels, or CSS position:sticky), back-to-top button (show/hide based on scroll position), scroll-linked animations (calculate progress as scrollTop/totalScrollable), infinite scroll (Intersection Observer on page bottom sentinel).
Answer
Use scroll handlers with throttling. Compute transform values dynamically. Avoid operations that trigger layout recalculation during scroll.
S
SugharaIQ Editorial Team
Verified Answer
This answer has been peer-reviewed by industry experts holding senior engineering roles to ensure technical accuracy and relevance for modern interview standards.
