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svg-inline

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Use when reviewing image assets, markup, and CDN or build transforms related to Manage inline SVG size and complexity. Check encoded size, rendered size, loading strategy, and above-the-fold impact together.

skills/svg-inline/SKILL.md

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Oct 31, 2026
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MIT

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# Manage inline SVG size and complexity

A complex illustration exported from Figma can easily be 50-200KB of SVG markup. Inlined in HTML, it blocks the HTML parser until it is processed, cannot be cached independently, and balloons every page response. Extracting it to an external file allows browser caching and deferred loading. For icon systems, SVG sprites or component libraries avoid duplicating path data across every page.

## Quick Reference

- Only inline SVG when you need CSS hover/animation on individual paths—static SVGs belong in `<img>` tags
- Keep inline SVGs under 1KB (ideally under 500 bytes) after SVGO optimisation
- Reused icons should be SVG sprites or framework components—not copied inline multiple times
- Run all SVGs through SVGO before inlining to strip editor artefacts

## Check

Scan HTML files and React/Vue components for inline <svg> elements. For each inline SVG: 1) Measure its character count—flag any over 1KB (approximately 1000 characters). 2) Check if it is reused in multiple places (should be a component or sprite). 3) Check if SVGO has been run (look for redundant attributes, inline styles that could be CSS classes, or editor comments). 4) Check if the SVG needs to be inline for CSS styling/animation, or if <img src="file.svg"> would suffice. Report each large inline SVG with its size and location.
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