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do-lang-javascript

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Master JavaScript ES2024+ for modern apps.

Software Engineering#vitest#javascript#eslint#node#ES2025#ES2024
Authoryejune
Version1.0.0
Installs0

System Documentation

What problem does it solve?

This Skill provides a comprehensive approach to mastering modern JavaScript (ES2024/ES2025) across runtimes and tooling, unifying knowledge for frontend and backend development.

Core Features & Use Cases

  • ES2024/ES2025 core features (Set methods, Promise.withResolvers, immutable arrays, Object.groupBy) across Node.js, Deno, and Bun.
  • Runtime support and tooling: Node.js 20/22 LTS, Deno, Bun; testing with Vitest/Jest; linting with ESLint 9 Biome; bundlers like Vite/esbuild/Rollup; backend frameworks Express, Fastify, Hono.
  • Use cases include building modern web apps, APIs, and command-line tools with a modern JS toolchain and best practices.

Quick Start

Create a new project and scaffold with modern tools:

  • Initialize a new project using Vite: npm create vite@latest my-app --template vanilla
  • Install development tooling: npm install -D vitest eslint @eslint/js biome
  • Run tests locally: npx vitest
  • Start a quick development server: npm run dev

Dependency Matrix

Required Modules

None required

Components

Standard package

💻 Claude Code Installation

Recommended: Let Claude install automatically. Simply copy and paste the text below to Claude Code.

Please help me install this Skill:
Name: do-lang-javascript
Download link: https://github.com/yejune/do-focus/archive/main.zip#do-lang-javascript

Please download this .zip file, extract it, and install it in the .claude/skills/ directory.
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