JavaScript

What this skill does

Writes, debugs, and reviews JavaScript: async and the event loop, coercion, closures, dates, Unicode, regex, and modern ES2023+ APIs. Use when JS throws TypeError or "undefined is not a function", a promise never settles or a rejection goes unhandled, NaN or [object Object] appears, dates shift by a day, sorting or equality misbehaves, memory grows, a regex hangs, JSON loses precision, a Node process won't exit or ignores signals, or fetch doesn't reject on a 404; also when choosing data structures, handling errors, profiling slow code, or checking whether a feature is safe for a target Node or browser version. Covers Node and browser runtime edges. Not for TypeScript type-system design or framework internals.

JavaScript is part of the Developer Tools category — developer tools that help your agent write, review, debug, and ship code. You can install it on its own or alongside other developer tools skills from the OpenClaw catalog.

How to install JavaScript

The easiest path is via the OpenClaw Easy desktop app — one click, no terminal required:

1. Download OpenClaw Easy for macOS or Windows (free, one-click installer, ~30 seconds).
2. Open the in-app Skills panel.
3. Search for javascript and click Install.
4. The skill activates automatically when an incoming message matches its description.

Install from the command line

If you already run the OpenClaw CLI, add JavaScript with a single command:

openclaw skills add javascript

This pulls javascript from ClawHub and installs it into ~/.openclaw/skills/javascript/. Restart the OpenClaw gateway afterwards so the new skill is discovered.

How to use JavaScript

Once installed, JavaScript activates on its own: when an incoming message on WhatsApp, Telegram, Slack, Discord, Feishu or Line matches the skill's description, your OpenClaw agent loads it and runs the workflow. You can also trigger it explicitly by describing the task in chat. No extra configuration is required after install.

Manual install (advanced)

If you prefer manual installation:

1. Click the Download .zip button above to grab javascript-1.0.6.zip directly from our S3 mirror.
2. Unzip into ~/.openclaw/skills/javascript/ (create the directory if it does not exist).
3. Restart OpenClaw Easy (or the OpenClaw CLI gateway) so the new skill is discovered.

Frequently asked questions

How do I install JavaScript?

Install JavaScript in the OpenClaw Easy desktop app by opening the Skills panel, searching for javascript, and clicking Install. From a terminal you can run: openclaw skills add javascript. Either way the skill is placed in ~/.openclaw/skills/javascript/.

Is JavaScript free?

Yes. JavaScript is free and open-source, distributed under the Apache-2.0 license through ClawHub. No account or payment is required to download or run it.

What does JavaScript do?

Writes, debugs, and reviews JavaScript: async and the event loop, coercion, closures, dates, Unicode, regex, and modern ES2023+ APIs.

Related: more developer tools skills

If JavaScript looks useful, you may also want to check out other developer tools skills in the OpenClaw catalog:

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Browse the full OpenClaw skill catalog

This page covers just one skill. The OpenClaw skill hub has 10,000+ more — search, sort by downloads or stars, and install any of them in one click. There is also a curated awesome-openclaw-skills list grouped by use case.