Agent-skills-standard javascript-best-practices

Idiomatic JavaScript patterns and conventions for maintainable code. Use when writing or refactoring JavaScript following idiomatic patterns and conventions. (triggers: **/*.js, **/*.mjs, module, import, export, error, validation)

install

source · Clone the upstream repo

git clone https://github.com/HoangNguyen0403/agent-skills-standard

Claude Code · Install into ~/.claude/skills/

T=$(mktemp -d) && git clone --depth=1 https://github.com/HoangNguyen0403/agent-skills-standard "$T" && mkdir -p ~/.claude/skills && cp -r "$T/skills/javascript/javascript-best-practices" ~/.claude/skills/hoangnguyen0403-agent-skills-standard-javascript-best-practices-0c9333 && rm -rf "$T"

manifest: skills/javascript/javascript-best-practices/SKILL.md

source content

JavaScript Best Practices

Priority: P1 (OPERATIONAL)

Implementation Guidelines

Naming:
```
camelCase
```
(vars/funcs),
```
PascalCase
```
(classes),
```
UPPER_SNAKE
```
(constants).
Errors: Throw
```
Error
```
objects only. Handle all async errors.
Comments: JSDoc for APIs. Explain "why" not "what".
Files: One entity per file.
```
index.js
```
for exports.
Modules: Named exports only. Order: Ext -> Int -> Rel.

Anti-Patterns

No Globals: Encapsulate state.
No Magic Numbers: Use
```
const
```
.
No Nesting: Guard clauses/early returns.
No Defaults: Use named exports.
No Side Effects: Keep functions pure.

Code & Reference

See references/REFERENCE.md for constants, custom errors, async patterns, and module structure examples.