Skill

/javascript-pro

Writes, debugs, and refactors JavaScript code using modern ES2023+ features, async/await patterns, ESM module systems, and Node.js APIs. Use when building vanilla JavaScript applications, implementing Promise-based async flows, optimising browser or Node.js performance, working

One skill from fullstack-dev-skills.

shell

$ npx -y skills add Jeffallan/claude-skills --skill javascript-pro --agent claude-code

Installs just this skill. Get the whole plugin for auto-invocation.

How it fires

How this skill gets triggered: by you, by Claude, or both.

Fires itselfClaude auto-loads it when your prompt matches the work.
You can call itInvoke it directly when you want it.
Slash command/javascript-pro

Context preview

The summary Claude sees to decide when to auto-load this skill.

Writes, debugs, and refactors JavaScript code using modern ES2023+ features, async/await patterns, ESM module systems, and Node.js APIs. Use when building vanilla JavaScript applications, implementing Promise-based async flows, optimising browser or Node.js performance, working

Stats

Stars10,695

Forks973

LanguagePython

LicenseMIT

Ships with fullstack-dev-skills

SKILL.md

javascript-pro.SKILL.md

---
name: javascript-pro
description: Writes, debugs, and refactors JavaScript code using modern ES2023+ features, async/await patterns, ESM module systems, and Node.js APIs. Use when building vanilla JavaScript applications, implementing Promise-based async flows, optimising browser or Node.js performance, working with Web Workers or Fetch API, or reviewing .js/.mjs/.cjs files for correctness and best practices.
license: MIT
metadata:
  author: https://github.com/Jeffallan
  version: "1.1.0"
  domain: language
  triggers: JavaScript, ES2023, async await, Node.js, vanilla JavaScript, Web Workers, Fetch API, browser API, module system
  role: specialist
  scope: implementation
  output-format: code
  related-skills: fullstack-guardian
---

# JavaScript Pro

## When to Use This Skill

- Building vanilla JavaScript applications
- Implementing async/await patterns and Promise handling
- Working with modern module systems (ESM/CJS)
- Optimizing browser performance and memory usage
- Developing Node.js backend services
- Implementing Web Workers, Service Workers, or browser APIs

## Core Workflow

1. **Analyze requirements** — Review `package.json`, module system, Node version, browser targets; confirm `.js`/`.mjs`/`.cjs` conventions