---
title: "JavaScript Pro - Air Market"
description: "You are working in plain JavaScript, in the browser or in Node, and you want it written well, debugged, or cleaned up. This helps with modern language features, asynchronous code that is hard to foll…"
canonical: "https://airmarket.ai/app/javascript-pro"
---

[Air Market](/) / [Developer Tools](/category/devtools) / JavaScript Pro

Skill by [Jeffallan](/@jeffallan)

# JavaScript Pro

Write, fix and tidy JavaScript without reaching for a framework

## What this does

You are working in plain JavaScript, in the browser or in Node, and you want it written well, debugged, or cleaned up. This helps with modern language features, asynchronous code that is hard to follow, performance problems, and reviewing files you are unsure about.

### Top 3 things it does for you

- Write plain JavaScript that uses current language features
- Untangle asynchronous code
- Track down why something is slow in the browser or Node

## Information

**JavaScript Pro at a glance**

|  |  |
| --- | --- |
| Kind | Skill |
| Publisher | [Jeffallan](/@jeffallan) |
| Category | [Developer Tools](/category/devtools) |
| Works with | Agent Skills - an open standard supported by 40+ agents |
| Version | 1.1.0 |
| Size | 46 KB |
| Licence | MIT |
| Repository | [Jeffallan/claude-skills](https://github.com/Jeffallan/claude-skills/tree/5e8b6b8ff4007414f91f980771047b6136600c34/skills/javascript-pro) |
| GitHub stars | 11,146 (as of Nov 2026) |

## Security report

**Verified.** AIR scanned this exact version of JavaScript Pro and recorded 0 findings and 2 flagged items. AIR's verdict: **safe**.

**What JavaScript Pro's check was run against**

|  |  |
| --- | --- |
| Commit | 5e8b6b8ff4007414f91f980771047b6136600c34 |
| Content hash | f7a62b79d2f0e323698ac3e8a7214440e49961ee157140024c0b3652d933985c |
| Files read | [Browse the files at this exact commit](https://github.com/Jeffallan/claude-skills/blob/5e8b6b8ff4007414f91f980771047b6136600c34/skills/javascript-pro/SKILL.md) |

A scan is named by the exact content it read, not by a version number. A different version is a different artifact, and nothing here applies to a version AIR has not scanned.

[Read the full security report for JavaScript Pro](/security/javascript-pro)

## About JavaScript Pro

This writes, debugs, and refactors JavaScript using modern ES2023+ features, async/await patterns, ESM module systems, and Node.js APIs.

Use it when building vanilla JavaScript applications, implementing Promise-based async flows, optimising browser or Node.js performance, or working with Web Workers and the Fetch API. It also reviews .js, .mjs and .cjs files for correctness and best practices.

## What's inside

- SKILL.md - instructions
- references/async-patterns.md - reference
- references/browser-apis.md - reference
- references/modern-syntax.md - reference
- references/modules.md - reference
- references/node-essentials.md - reference

## Questions

### Is JavaScript Pro safe to install?

AIR scanned this exact version of JavaScript Pro and recorded 0 findings and 2 flagged items. AIR's verdict: safe. The verdict is named by the content that was read, at commit 5e8b6b8ff400, so it cannot drift onto a version nobody scanned. The full report is at https://airmarket.ai/security/javascript-pro.

### How do I install JavaScript Pro?

Open https://airmarket.ai/app/javascript-pro on Air Market and use the install action: Air Market hands Claude a prompt naming this exact skill, and Claude sets it up. Source, pinned to the exact commit this listing describes: https://github.com/Jeffallan/claude-skills/tree/5e8b6b8ff4007414f91f980771047b6136600c34/skills/javascript-pro. Install from that link, not the branch.

## Related on Air Market

- [More Developer Tools listings](/category/devtools)
- [Everything by Jeffallan](/@jeffallan)

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Canonical URL: <https://airmarket.ai/app/javascript-pro>