@ver0/eslint-config

🔬 A comprehensive ESLint configuration used across all ver0 projects

✨ What's Included

This config brings together the best ESLint rules and plugins to help you write clean, consistent code. Here's what you get out of the box:

🎯 Core Features

• JavaScript & TypeScript - Full support for modern JS/TS syntax
• React Support - Optional React-specific linting rules
• Node.js Integration - Node-specific rules when targeting server environments
• JSON Linting - Support for .json, .jsonc, and .json5 files
• Markdown Linting - Keep your documentation consistent
• Vitest Testing - Specialized rules for Vitest test files
• Prettier Integration - Seamlessly works with Prettier formatting

📦 Supported File Types

• JavaScript: .js, .jsx, .mjs, .cjs
• TypeScript: .ts, .tsx, .mts, .cts
• JSON: .json, .jsonc, .json5
• Markdown: .md
• Tests: .test.*, .benchmark.*

🔧 Included Plugins & Configs

• ESLint recommended rules
• XO configuration (both JS and TS)
• Import/export validation and sorting
• Unicorn (modern JS practices)
• Promise best practices
• ESLint comments management
• TypeScript-specific linting
• React hooks and JSX rules (when enabled)
• And many more quality-of-life improvements!

🚀 Installation

yarn add -D @ver0/eslint-config

📖 Usage

ESLint Configuration

Setting up your ESLint config is straightforward! The configuration assumes you're using TypeScript and Prettier by default (though you can disable specific features if needed).

// eslint.config.js
import {defineConfig} from 'eslint/config';
import {buildConfig} from '@ver0/eslint-config';

export default defineConfig(
	...buildConfig({
		globals: 'node',
		typescript: true,
		typescriptUnsafe: true,
		vitest: true,
		json: true,
		markdown: true,
		react: true,
	}),
	{
		files: ['README.md'],
		language: 'markdown/gfm',
	},
	// ... any other configs on your taste...
);

🎛️ Configuration Options

Option	Type	Default	Description
globals	string	'node'	Required. Environment globals ('node', 'browser', etc.)
prettier	boolean	true	Enable Prettier integration and formatting rules
typescript	boolean	true	Enable TypeScript-specific linting rules
typescriptUnsafe	boolean	false	Disable TypeScript's strict safety rules
json	boolean	true	Enable JSON/JSONC/JSON5 file linting
markdown	boolean	true	Enable Markdown file linting
react	boolean	false	Enable React and JSX-specific rules
vitest	boolean	false	Enable Vitest testing framework rules

🌟 Common Configurations

For a Node.js API project:

// eslint.config.js
import {defineConfig} from 'eslint/config';
import {buildConfig} from '@ver0/eslint-config';

export default defineConfig(
	...buildConfig({
		globals: 'node',
		vitest: true, // if you're using Vitest for testing
	}),
	// ... any other configs on your taste...
);

For a React web application:

// eslint.config.js
import {defineConfig} from 'eslint/config';
import {buildConfig} from '@ver0/eslint-config';

export default defineConfig(
	...buildConfig({
		globals: 'browser',
		react: true,
		vitest: true,
	}),
	// ... any other configs on your taste...
);

🎨 Prettier Configuration

This package also provides opininated default Prettier configuration, that you can extend from.

// .prettierrc.js
import ver0Config from '@ver0/eslint-config/.prettierrc.js';

export default {
	...ver0Config,
	// Override any settings if needed
	// printWidth: 100,
};

⚙️ EditorConfig

For consistent formatting across different editors, you can copy our .editorconfig that is aligned with our Prettier configuration:

# .editorconfig
[*]
indent_style = tab
tab_width = 2
end_of_line = lf
charset = utf-8
trim_trailing_whitespace = true
insert_final_newline = true
max_line_length = 120

[*.yml]
indent_style = space
indent_size = 2

🛠️ Troubleshooting

Rules conflicting with your existing setup? You can override specific rules by adding them after our config:

// eslint.config.js
import {defineConfig} from 'eslint/config';
import {buildConfig} from '@ver0/eslint-config';

export default defineConfig(...buildConfig({globals: 'node'}), {
	rules: {
		'some-rule': 'off', // Override any rule
	},
});