Master ES6+ features including async/await, destructuring, spread operators, arrow functions, promises, modules, iterators, generators, and functional programming patterns for writing clean, efficient JavaScript code. Use when refactoring legacy code, implementing modern patterns, or optimizing JavaScript applications.
Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.
What the file says
# Modern JavaScript Patterns
Comprehensive guide for mastering modern JavaScript (ES6+) features, functional programming patterns, and best practices for writing clean, maintainable, and performant code.
## When to Use This Skill
- Refactoring legacy JavaScript to modern syntax
- Implementing functional programming patterns
- Optimizing JavaScript performance
- Writing maintainable and readable code
- Working with asynchronous operations
- Building modern web applications
- Migrating from callbacks to Promises/async-await
- Implementing data transformation pipelines
## Detailed patterns and worked examples
Detailed pattern documentation lives in `references/details.md`. Read that file when the navigation tier above is insufficient.
## Best Practices
1. **Use const by default**: Only use let when reassignment is needed
2. **Prefer arrow functions**: Especially for callbacks
3. **Use template literals**: Instead of string concatenation
4. **Destructure objects and arrays**: For cleaner code
5. **Use async/await**: Instead of Promise chains
6. **Avoid mutating data**: Use spread operator and array methods
…
The line at the top of this page pins the label git:20260626.019dba9, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.
A 17 of 17 checks passed. Fixed automatic checks with no AI involved, so the same checks give the same answer every run.
pass: Frontmatter block present
pass: Frontmatter declares a name
pass: Frontmatter declares a description
pass: Size between 200 bytes and 200 KB (2189 bytes)
pass: No zero-width or bidi control characters
pass: No instruction hidden inside an HTML comment
pass: No link to an exfiltration or paste host
pass: No credential-shaped string
pass: No instruction to send local credentials anywhere
pass: No text hidden with inline styles
pass: No prompt-injection phrasing
pass: No curl or wget piped into a shell
pass: No recursive delete of root, home or parent
pass: No instruction to read or print local credentials
pass: No base64 blob over 200 characters
pass: No link to a raw IP address
pass: No script tag
Source
GitHub
rudycity/superagent · 52 stars · license MIT · pushed 2026-10-20 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_2gwwa5xpkv5rd56g
GET https://markdownregistry.com/api/v1/resolve?ref=rudycity/superagent/modern-javascript-patterns
GET https://markdownregistry.com/api/v1/blob/32e203b8d944115102986dcb3cf4c48918edc5dbf6942668875970121809c064
Your AI assistant does the legwork. You hear about the deals worth your word. Hand yours the standing instructions at modelranch.com and it joins the network that reads files like this one.
rudycity/superagent · .agents/skills/adhd/SKILL.md · Designed to assist users with ADHD (Attention Deficit Hyperactivity Disorder) by mitigating task paralysis, managing…
rudycity/superagent · .agents/skills/agent-browser/SKILL.md · Browser automation CLI for AI agents. Use when the user needs to interact with websites, including navigating pages…
rudycity/superagent · .agents/skills/airflow-dag-patterns/SKILL.md · Build production Apache Airflow DAGs with best practices for operators, sensors, testing, and deployment. Use when…
rudycity/superagent · .agents/skills/algorithmic-art/SKILL.md · Creating algorithmic art using p5.js with seeded randomness and interactive parameter exploration. Use this when users…
rudycity/superagent · .agents/skills/angular-migration/SKILL.md · Migrate from AngularJS to Angular using hybrid mode, incremental component rewriting, and dependency injection updates…
rudycity/superagent · .agents/skills/anti-reversing-techniques/SKILL.md · Understand anti-reversing, obfuscation, and protection techniques encountered during software analysis. Use this skill…
rudycity/superagent · .agents/skills/antislop-copywriting/SKILL.md · Copy and text skill for antislop. Use when writing or editing prose: headlines, tone, CTAs, and anti-AI-writing…
rudycity/superagent · .agents/skills/antislop-human/SKILL.md · Human and accessibility skill for antislop. Contrast, keyboard, focus, and states for real people. Includes the…
rudycity/superagent · .agents/skills/antislop-layoutmobile/SKILL.md · Mobile layout skill for antislop. Use for layouts that reflow across screen sizes, phone to desktop: grids, overflow…
