modern-javascript-patterns
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.
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Install
Works with every agent the skills CLI supports.
npx skills add https://github.com/wshobson/agents --skill modern-javascript-patterns- 01
Install
Run the command in your project. The CLI asks which agents to install for.
- 02
Describe the task
Ask your agent for something this skill covers. It loads modern-javascript-patterns automatically when relevant.
- 03
Review the result
The agent follows the SKILL.md steps, scripts and references bundled with the skill.
Security audits
Independent scans of the skill's instructions and bundled files.
SKILL.md
The instructions your agent reads when the skill is triggered.
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
- Use const by default: Only use let when reassignment is needed
- Prefer arrow functions: Especially for callbacks
- Use template literals: Instead of string concatenation
- Destructure objects and arrays: For cleaner code
- Use async/await: Instead of Promise chains
- Avoid mutating data: Use spread operator and array methods
- Use optional chaining: Prevent "Cannot read property of undefined"
- Use nullish coalescing: For default values
- Prefer array methods: Over traditional loops
- Use modules: For better code organization
- Write pure functions: Easier to test and reason about
- Use meaningful variable names: Self-documenting code
- Keep functions small: Single responsibility principle
- Handle errors properly: Use try/catch with async/await
- Use strict mode:
'use strict'for better error catching
For common pitfalls (this binding, promise anti-patterns, memory leaks), see references/advanced-patterns.md.
FAQ
What does the modern-javascript-patterns skill do?
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.
How do I install modern-javascript-patterns?
Run npx skills add https://github.com/wshobson/agents --skill modern-javascript-patterns in your project. The skills CLI detects the agents you use and copies the skill into the right folder. For Claude Code you can also place the skill folder at ~/.claude/skills/modern-javascript-patterns/ (personal) or .claude/skills/modern-javascript-patterns/ (project).
Which AI agents can use modern-javascript-patterns?
Any agent that supports the open Agent Skills format (a folder with a SKILL.md file), including Claude Code, Codex, Cursor, GitHub Copilot, Gemini CLI, Windsurf, Cline, OpenCode and more.
Is modern-javascript-patterns safe to install?
Security partners have reviewed it: Gen Agent Trust Hub passed; Socket passed; Snyk passed; Runlayer passed; ZeroLeaks passed. As with any skill, read the SKILL.md and bundled scripts before installing.
Who maintains modern-javascript-patterns?
It is published by wshobson in wshobson/agents. It has 21,704 recorded installs.
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