Individual skill
lazy-loading
Use when auditing slow page loads, heavy assets, or rendering delays related to Implement lazy loading for offscreen content. Verify the actual bottleneck in DevTools, Lighthouse, or field data before recommending changes. Absence of `loading='lazy'` is not enough by itself when fold position is unknown.
skills/lazy-loading/SKILL.md
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- Last checked
- Nov 9, 2026
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- Repository last updated
- Oct 31, 2026
- License
- MIT
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SKILL.mdcore · 1,952 bytesreferences/rule.mddoc · 4,529 bytes
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# 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
