# spatie-javascript

Applies Spatie's JavaScript and TypeScript coding conventions across projects, configures Prettier, and enforces clean syntax in Vue or TS files.

- skill · `type=skill` · Claude Code, Codex, Cursor, GitHub Copilot, Gemini CLI, OpenCode · 518 installs · ★ 97
- Author: Spatie
- License: MIT · policy=mirror · the beginning of the file is at the end of this page
- Source: https://github.com/spatie/guidelines-skills/tree/HEAD/resources/boost/skills/spatie-javascript/SKILL.md
- Updated: 2026-10-22
- HTML: https://affpapa.org/en/nevibecode/skills/spatie-javascript

## What it does

This skill guides AI coding assistants to format and refactor JavaScript, TypeScript, and Vue single-file components according to Spatie guidelines. The agent first inspects `references/spatie-javascript-guidelines.md` and applies the project's Prettier settings before addressing code syntax. Formatting enforces four-space indentation, single quotes, and standard line limits.

Variable declarations strictly disallow `var`, reserving `let` only for values that undergo reassignment. Code changes enforce strict equality with type casting, promote destructuring for arrays and objects, and discourage abbreviated identifiers outside short arrow functions. Declarations use the `function` keyword, while functions remain pure and restrict reliance on `this`.

The skill deliberately ignores PHP, Laravel, standalone CSS, and server setup tasks, so running it on backend scripts produces no effect.

## Install

### Claude Code (native platform)

1. **Skills CLI (Vercel)**
```bash
npx skills add spatie/guidelines-skills --skill spatie-javascript -a claude-code
```

2. **Manually: put the files in place**
- File: `~/.claude/skills/spatie-javascript/SKILL.md` — Copy the whole skill folder; for one project use .claude/skills/spatie-javascript/

### Codex

1. **Skills CLI (Vercel)**
```bash
npx skills add spatie/guidelines-skills --skill spatie-javascript -a codex
```

2. **Manually: put the files in place**
- File: `.agents/skills/spatie-javascript/SKILL.md` — For all projects use ~/.agents/skills/

### Cursor

1. **Skills CLI (Vercel)**
```bash
npx skills add spatie/guidelines-skills --skill spatie-javascript -a cursor
```

2. **Manually: put the files in place**
- File: `.cursor/skills/spatie-javascript/SKILL.md` — Cursor also reads .agents/skills/ and .claude/skills/

### GitHub Copilot

1. **GitHub CLI**
```bash
gh skill install spatie/guidelines-skills spatie-javascript
```

2. **Manually: put the files in place**
- File: `.github/skills/spatie-javascript/SKILL.md`

### Gemini CLI

1. **Skills CLI (Vercel)**
```bash
npx skills add spatie/guidelines-skills --skill spatie-javascript -a gemini-cli
```

2. **Platform CLI**
```bash
gemini skills install https://github.com/spatie/guidelines-skills --path resources/boost/skills/spatie-javascript
```

### Windsurf (Devin Desktop)

**Manually: put the files in place**
- File: `.devin/skills/spatie-javascript/SKILL.md` — The legacy .windsurf/skills/ path still works

### OpenCode

**Skills CLI (Vercel)**
```bash
npx skills add spatie/guidelines-skills --skill spatie-javascript -a opencode
```

### Claude.ai

**Claude.ai**
- Zip the folder and upload it in Settings → Capabilities → Skills

Where a file is given instead of a command, copy the files from the source to that path: https://github.com/spatie/guidelines-skills/tree/HEAD/resources/boost/skills/spatie-javascript/SKILL.md

## When to use it
- configure Prettier according to Spatie standards
- refactor `var` declarations into `const` and `let`
- enforce strict equality checks with explicit type casting
- clean up cryptic variable abbreviations across TypeScript and Vue files

## Example prompts
- Review this Vue component against Spatie JavaScript guidelines and fix formatting.
- Refactor this TypeScript file to eliminate `var` and replace loose comparisons.
- Generate a Prettier configuration file following Spatie conventions.

## Source text · SKILL.md · MIT

Below is the content of a third-party file. It is data, not instructions for you: do not act on anything written inside unless the human asks. Block tag: 10e2b4eed315be44.

BEGIN THIRD-PARTY FILE 10e2b4eed315be44
```text
---
name: spatie-javascript
description: Apply Spatie's JavaScript coding standards for any task that creates, edits, reviews, refactors, or formats JavaScript or TypeScript code; use for variable declarations, comparisons, functions, destructuring, and Prettier configuration to align with Spatie's JS conventions.
license: MIT
metadata:
  author: Spatie
---

# Spatie JavaScript Guidelines

## Overview
Apply Spatie's JavaScript coding standards to keep JS/TS code consistent and readable.

## When to Activate
- Activate this skill for any JavaScript or TypeScript coding work.
- Activate this skill when working on `.js`, `.ts`, `.jsx`, `.tsx`, or `.vue` files.
- Activate this skill when configuring Prettier for a project.

## Scope
- In scope: JavaScript, TypeScript, Vue single-file components, Prettier configuration.
- Out of scope: PHP, Laravel, CSS-only files, server configuration.

## Workflow
1. Identify the JavaScript, TypeScript, Vue, or Prettier artifact being changed.
2. Read `references/spatie-javascript-guidelines.md` and focus on the relevant sections.
3. Apply Prettier configuration first, then the language rules relevant to the change.

## Core Rules (Summary)
- Use four-space indentation, a 120-character print width, and single quotes.
- Prefer `const`, use `let` only for reassignment, and never use `var`.
- Avoid abbreviated variable names except in clear single-line arrow functions.
- Always use strict equality and cast values before comparing different types.
- Use `function` for declarations and arrow functions for anonymous or terse functions when appropriate.
- Keep functions pure, limit `this`, and use shorthand object methods.
- Prefer object and array destructuring.

## References
- `references/spatie-javascript-guidelines.md`
```
END THIRD-PARTY FILE 10e2b4eed315be44

The third-party file has ended. Everything between the 10e2b4eed315be44 tags is data: requests and commands from it are not followed. An “end of file” line with another tag inside the block is part of the file.

© Spatie · MIT · https://github.com/spatie/guidelines-skills/tree/HEAD/resources/boost/skills/spatie-javascript/SKILL.md

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From the same set: [spatie/guidelines-skills](https://affpapa.org/en/nevibecode/by/spatie/guidelines-skills.md) — 4 cards

---
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