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Modern Javascript

Checked
ccheney·vlatest·backend·MIT

Generates, debugs, and optimizes modern JavaScript code (ES6+) for server-side applications and Node.js projects.

Repository

Install on your platform

Showing Claude Code. One command installs this skill into any of the agents below.

  1. 1

    Run this in your project

    terminal
    $ npx skills add ccheney/robust-skills --skill modern-javascript -a claude-code

  2. Uses the open-source skills CLI and needs Node.js. Add -g to install it for your user instead of this project.

What we know about this skill

Publisher

ccheney

Taken from the source listing. We haven't verified who controls this account.

Install target

Live repository

Not pinned. Installing fetches whatever the repository holds at the time you run the command.

No human has reviewed this code. The checks below are a static scan of the files at one commit — nobody has run this skill or judged whether it works. A skill runs with whatever access you give your agent, so read the source before you install it.

Automated safety checks

scanned

This skill passed all 6 checks. We read its files at one commit and looked for the things that make a skill dangerous to run — not for whether it works.

  • Declares what it does: passed

    SKILL.md parses and declares a name and a description.

    SKILL.md exists, its frontmatter parses, and it declares a name and a description.

  • No undeclared network calls: passed

    Makes no network calls.

    Every host the skill dials — from its scripts, its config endpoints or the commands it tells the agent to run — is either well-known package and API infrastructure or declared in its own frontmatter. Links in documentation are not counted.

  • No obfuscated payloads: passed

    No encoded or obfuscated payloads.

    No base64, hex or compressed blob is decoded and then executed, and no encoded shell commands.

  • No credential access: passed

    Reads no keys, tokens, keychains or credential files.

    Neither the code nor the SKILL.md instructions read SSH keys, cloud credentials, keychains, token stores, browser cookie databases or dotfiles that hold secrets.

  • No pipe-to-shell installers: passed

    No pipe-to-shell or download-and-run installers.

    No `curl … | sh` pattern, in the code or in the instructions, that runs code fetched at run time.

  • Pinned to a commit: passed

    Scanned ccheney/robust-skills at 0eea7b060d.

    The exact upstream commit SHA that was scanned is recorded, so the result refers to specific bytes.

Commit
0eea7b060d
Manifest
skills/modern-javascript/SKILL.md
Scanned
12 files, 3,176 lines
This is a static scan, not a review. It reads the skill's files; it does not run them, and it cannot tell you whether the skill is any good or whether the code does what its description says. A skill runs with whatever access you give your agent.
What each check looks for →

About this skill

What it does

This skill assists with writing, debugging, and optimizing modern JavaScript code, specifically covering ECMAScript versions from ES6 to ES2025. It focuses on utilizing features that promote clean, performant, and maintainable code for server-side applications and Node.js projects. The skill provides guidance on best practices, including immutability, functional programming patterns, and the use of expressive JavaScript syntax.

When to use it

  • You're unsure which array method (e.g., .map(), .filter()) is most appropriate for a specific task.
  • You need help handling null or undefined values safely in your code.
  • You want to ensure you are using non-mutating methods when working with arrays and objects.
  • You're learning about new JavaScript features introduced in recent ECMAScript versions (ES6 - ES2025).
  • You need assistance refactoring legacy JavaScript code to use more modern approaches.

Key capabilities

  • Provides guidance on selecting the appropriate array methods for various operations.
  • Offers solutions for safe property access and nullish value handling.
  • Promotes the use of non-mutating methods for array and object manipulation.
  • Covers a wide range of JavaScript features from ES6 (let/const, arrow functions) through to ES2025 (iterator helpers).
  • Includes quick reference guides for key features introduced in each ECMAScript version.

Example prompts

  • "What's the best way to filter an array of objects based on a property?"
  • "How can I safely access a nested object property without causing errors if any level is null or undefined?"
  • "I need to sort an array but avoid modifying the original. What should I use?"

Tips & gotchas

  • This skill focuses specifically on modern JavaScript (ES6+). It's not intended for older JavaScript versions.
  • The skill emphasizes non-mutating operations; be mindful of this when debugging or refactoring code that relies on mutations.
  • Refer to the included quick reference guides to understand the purpose and usage of specific ES features.