How do I install the JS Libraries skill?

Run npx skillmds@latest add thedaviddias/js-libraries in your terminal (requires Node.js), paste this page's agent-chat prompt into Claude, Cursor, or any MCP-connected agent, or download the SKILL.md file and copy it into your agent's skills directory.

Is JS Libraries safe to use?

This skill has not completed SkillMD's automated safety review yet. SkillMD never runs a skill's scripts for you; review the SKILL.md before installing.

Which AI agents work with JS Libraries?

This skill is tagged as working with Claude Code, Claude.ai, OpenAI Codex. SKILL.md is an open format, so most agents that read a skills directory can load it too.

Is JS Libraries free to use?

Yes. Installing skills from SkillMD is free, and the skill stays under its author's original license.

Who published JS Libraries?

thedaviddias (@thedaviddias) published this skill. Their other Agent Skills are listed on their SkillMD profile.

JS Libraries by thedaviddias — Agent Skill

Name: JS Libraries
Author: thedaviddias

JS Libraries

Use when auditing slow page loads, heavy assets, or rendering delays related to Use secure and up-to-date JS libraries. Verify the actual bottleneck in DevTools, Lighthouse, or field data before recommending changes.

thedaviddias d43bce9 2 files · 4.0 KB Updated Sep 17, 2026

File contents

Use secure and up-to-date JS libraries

Outdated or vulnerable libraries pose security risks and often include unnecessary bloat that degrades performance.

Quick Reference

Regularly audit dependencies for known security vulnerabilities
Replace heavy libraries with lightweight alternatives (e.g., date-fns vs moment)
Ensure libraries are properly versioned and served via reliable CDNs or self-hosted

Check

Check the project's JavaScript dependencies for known vulnerabilities and outdated versions.

Fix

Update vulnerable libraries to secure versions and replace bloated dependencies with modern, lightweight alternatives.

Explain

Explain the risks of using outdated JavaScript libraries and the benefits of using lightweight alternatives.

Code Review

Review the routes, assets, and loading behavior that affect Use secure and up-to-date JS libraries. Flag exact files, requests, or rendering steps that add unnecessary network, CPU, or layout cost, and describe the measurement method used to confirm the issue.

For full implementation details, code examples, and framework-specific guidance, see references/rule.md.

Rule page: https://frontendchecklist.io/en/rules/performance/js-libraries

Frequently asked questions