Implement lazy loading for offscreen content

Lazy loading defers non-critical resources until needed—this reduces initial page weight, speeds up first paint, and saves bandwidth for content users may never scroll to.

Quick Reference

• Use loading='lazy' for images below the fold
• Never lazy load LCP/above-fold images—they need priority
• Lazy load iframes, videos, and heavy components
• Use Intersection Observer for custom lazy loading
• If fold position is unclear from the snippet, do not invent a lazy-loading defect

Check

Verify that images and other heavy resources below the fold are lazy loaded. Only report this when the code or route context makes offscreen placement clear.

Fix

Implement lazy loading for images, videos, and iframes using native loading='lazy' or JavaScript solutions.