Javascript Expert

This is a comprehensive JavaScript skill that covers modern ES2024+ features, Node.js patterns, and the npm ecosystem. You get practical examples of top-level await, private class fields, async generators, and the newer non-mutating array methods like toSorted. It includes real-world patterns for error handling with custom error classes, functional programming techniques, and testing setups for both Vitest and Jest. The skill supports running Node, npm, Bun, and Deno commands directly. Use this when you need Claude to write production-grade JavaScript with current best practices, not legacy patterns. The code samples are dense and opinionated, leaning toward immutability and ESM modules.

Install to Claude Code

npx -y skills add personamanagmentlayer/pcl --skill javascript-expert --agent claude-code