@sheplu/eslint-config-json

Opinionated and lightweight ESLint config for JSON files. Built to ensure consistent formatting and validation across projects.

Features

• ✅ Preconfigured for JSON, JSONC and JSON5 files (.json, .jsonc, json5)
• ✅ Enforces consistent key ordering and spacing
• ✅ Prevents trailing commas and other structural mistakes
• ✅ Zero-dependency and plug-and-play setup
• ✅ Works perfectly with editors and CI pipelines

Installation

You can install the config as a dev dependency:

npm install -D @sheplu/eslint-config-json
# or
yarn add -D @sheplu/eslint-config-json
# or
pnpm add -D @sheplu/eslint-config-json

Usage

In your eslint.config.js, extend the shared config:

Flat config (ESLint ≥ 9)

import { jsonRules } from "@sheplu/eslint-config-json";
import json from "@eslint/json";

export default defineConfig([
  {
    'extends': [ jsonRules ],
    'files': [ '**/*.json' ],
    'language': 'json/json',
    'plugins': { json },
  },
]);

Recommended Editor Setup

• VS Code with the ESLint extension enabled.

• Add this to your .vscode/settings.json:

  {
    "editor.formatOnSave": true,
    "eslint.validate": ["json", "jsonc"]
  }