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import-on-visibility

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Use when reviewing long pages, dashboards, or content feeds with expensive offscreen modules. Balance early enough loading for smooth scrolling against keeping the initial route light.

skills/import-on-visibility/SKILL.md

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# Load non-critical code when content approaches the viewport

Many pages ship JavaScript for offscreen sections that a user may never reach. Import-on-visibility keeps the initial route lighter while still loading content early enough to feel ready when users scroll to it.

## Quick Reference

- Use Intersection Observer to start loading code before an offscreen section becomes visible
- Reserve space with placeholders or skeletons so deferred sections do not cause layout shift
- Tune `rootMargin` so heavy content loads early enough without competing with above-the-fold work
- Use this for charts, reviews, related products, embeds, and offscreen dashboards

## Check

Identify components, widgets, or modules that load on first render even though they only appear after the user scrolls. Flag which ones can switch to visibility-based loading.
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