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dom-size

Use when auditing slow page loads, heavy assets, or rendering delays related to Reduce DOM size and complexity. Verify the actual bottleneck in DevTools, Lighthouse, or field data before recommending changes.

skills/dom-size/SKILL.md

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# Reduce DOM size and complexity

An excessive DOM size increases memory usage, slows down style calculations, and makes layout reflows more expensive, leading to poor interaction performance.

## Quick Reference

- Keep total DOM nodes below 1,500
- Avoid deep nesting (maximum depth < 32)
- Use virtualization for long lists of elements

## Check

Check the total number of DOM nodes and the maximum DOM depth using Lighthouse or Chrome DevTools.