name: javascript
description: Modern JavaScript conventions and ES2020+ features.
skills:
- conventions
allowed-tools:
- documentation-reader
- web-search

JavaScript Skill

Overview

Modern JavaScript patterns and best practices for ES2020+ development.

Objective

Guide developers in writing clean, efficient JavaScript using modern language features and patterns.

Conventions

Refer to conventions for:

• Code organization
• Naming patterns
• Documentation

JavaScript Specific

• Use const/let instead of var
• Prefer arrow functions for callbacks
• Use template literals for string interpolation
• Leverage destructuring for objects and arrays
• Use async/await for asynchronous operations
• Apply optional chaining (?.) and nullish coalescing (??)

Example

const fetchData = async (url) => {
  try {
    const response = await fetch(url);
    const data = await response.json();
    return data?.results ?? [];
  } catch (error) {
    console.error("Fetch failed:", error);
    return [];
  }
};

const { name, age = 18 } = user;
const greeting = `Hello, ${name}!`;

References

• https://developer.mozilla.org/en-US/docs/Web/JavaScript
• https://tc39.es/ecma262/