# JavaScript

> JavaScript coding standards and best practices for JavaScript and TypeScript. Use when writing or reviewing JavaScript code, working with promises, or discussing JavaScript patterns.

- Skill: `majiayu000/javascript-7` (Agent Skill, multi-file: 2 files)
- Install (CLI): `npx skillmds@latest add majiayu000/javascript-7`
- Raw SKILL.md: https://api.skillmd.com/api/skills/majiayu000/javascript-7/raw
- Safety review: pending (external: skill-scanner PASS, skillspector PASS)
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: Coding & Dev Tools
- Author: majiayu000 (https://skillmd.com/u/majiayu000)
- Updated: 2026-09-22
- Page: https://skillmd.com/skills/majiayu000/javascript-7

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# JavaScript

The following rules apply to both JavaScript and the Javascript-subset of TypeScript:

- Use existing APIs that return promises instead of constructing promises with `new`.