# Javascript Mastery

> ALWAYS use this when the request matches Javascript Mastery: 33+ essential JavaScript concepts every developer should know, inspired by [33-js-concepts](https://github.com/leonardomso/33-js-concepts).

- Skill: `anhvu1107/javascript-mastery` (Agent Skill, multi-file: 7 files)
- Install (CLI): `npx skillmds@latest add anhvu1107/javascript-mastery`
- Raw SKILL.md: https://api.skillmd.com/api/skills/anhvu1107/javascript-mastery/raw
- Safety review: pending
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: AI & ML
- Author: anhvu1107 (https://skillmd.com/u/anhvu1107)
- Updated: 2026-09-17
- Page: https://skillmd.com/skills/anhvu1107/javascript-mastery

---


# 🧠 JavaScript Mastery

## Selective Reading Rule

Start with:

- `references/senior-master-standard.md`
- `references/usage-routing.md`
- `references/quality-checklist.md`

Then load only the inherited docs, scripts, assets, examples, or detailed instructions that match the user's actual task.

## Progressive Disclosure

- Read `references/full-skill-instructions.md` only when the task needs the full original upstream guidance.
- Prefer bundled scripts for deterministic or repetitive operations when they exist.
- Reuse bundled assets instead of inventing substitutes when assets are present.
- Keep final answers aligned with this skill's frontmatter trigger, Senior Master standard, and Codex strict review gate.