Javascript Modern

Quality score: 70/100 · Category: Engineering · Sub-category: languages

lang:javascript

Implements modern JavaScript features from ES2020-ES2024 including optional chaining, nullish coalescing, private fields, Promise methods, and array transformations. Use when modernizing JavaScript code, using ES2024 features, or when user asks about latest ECMAScript standards.

What this skill does

Javascript Modern is a production-ready Claude Code skill (quality score 70/100) in the languages sub-category. It ships as a SKILL.md file that Claude Code auto-discovers under ~/.claude/skills/javascript-modern/ and loads when your prompt matches the skill's trigger.

When to invoke it: Use when modernizing JavaScript code, using ES2024 features, or when user asks about latest ECMAScript standards.

Who uses this skill

The Javascript Modern skill is built for software engineers, backend developers, full-stack teams, and technical leads building and maintaining production systems. It is part of the open ClaudSkills registry, a community-curated catalog of 15,000+ capabilities you can install for Claude Code — the Claude CLI agent.

How to install

Free

Manual install (2 steps)

mkdir -p ~/.claude/skills/javascript-modern
curl -L https://claudskills.com/skills/javascript-modern/SKILL.md \
  -o ~/.claude/skills/javascript-modern/SKILL.md

Or just download SKILL.md directly and drop it into ~/.claude/skills/javascript-modern/. Claude Code auto-discovers it on next session.

Skills live at ~/.claude/skills/javascript-modern/SKILL.md on macOS/Linux, or %USERPROFILE%\.claude\skills\javascript-modern\SKILL.md on Windows. See the full install guide for step-by-step instructions.

Pro

One-click install via the desktop app

The ClaudSkills desktop app installs any skill directly into ~/.claude/skills/ with one click — no terminal required. Pro starts at $9/mo or $149 lifetime.

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Part of ClaudSkills — the open registry for Claude Code skills. · What's New · Install guide · About · llms.txt

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