Configuration

The main package composes the final config array from a small set of clear inputs:

• Framework packages passed through frameworks.
• Optional integrations passed through enums such as Library, Testing, Format, Tool, and Extension.
• Runtime and preset choices.
• Global settings such as strict and settings.

Mental Model

Think of the config in three layers:

• Start with the main package and optional TypeScript support.
• Add explicit framework packages for the application stack.
• Add optional tooling through enums for libraries, testing, formats, tools, and extensions.

That keeps the final config readable while still giving you a broad feature set.

Core Composition Model

import { eslintConfig, Extension, Format, Library, Runtime, Testing, Tool } from '@santi020k/eslint-config-basic'
import react from '@santi020k/eslint-config-react'

export default eslintConfig({
  typescript: true,
  runtime: Runtime.Browser,
  frameworks: {
    react
  },
  libraries: [Library.Tailwind, Library.I18next],
  testing: [Testing.Vitest],
  formats: [Format.Markdown, Format.Mdx],
  tools: [Tool.Prettier],
  extensions: [Extension.Unicorn, Extension.Security]
})

Presets

The base package exposes named presets for common setups.

Preset	Meaning
Basic	Core JavaScript rules only.
Node	Core + TypeScript + Node globals.
Browser	Core + TypeScript + Browser globals.
All	TypeScript plus all bundled optional integrations from the main package.

Framework packages are still explicit even when you use a preset.

Minimal Config

import { eslintConfig } from '@santi020k/eslint-config-basic'

export default eslintConfig()

Runtime and Framework Contracts

• Runtime.Node enables Node.js globals.
• Runtime.Browser enables browser globals.
• Runtime.Universal keeps both environments available.
• frameworks.react is required when frameworks.next or frameworks.expo is used.
• nextMode: NextMode.AppRouter adds the App Router override for Next.js.
• When you write the config manually, pass imported framework packages instead of booleans.

Configuration Priority

The eslintConfig function uses a hierarchical merging strategy for its settings:

1. User Options: Any field explicitly passed to eslintConfig({}) always takes the highest priority.
2. Preset Defaults: If a preset is chosen, its default values are used for any fields not explicitly provided by the user.
3. Auto-Detection: If a field is still undefined, it falls back to values detected from your package.json, tsconfig.json, and project structure.

TIP

To disable a feature that is being auto-detected, explicitly set it to false or an empty array (e.g., typescript: false or libraries: []).

Full Settings Example

For large projects with multiple integrations, you can activate everything in a single call. Most of these will be auto-detected if the packages exist in your dependencies, but you can be explicit:

import { eslintConfig, Extension, Format, Library, Testing, Tool } from '@santi020k/eslint-config-basic'
import next from '@santi020k/eslint-config-next'
import react from '@santi020k/eslint-config-react'

export default eslintConfig({
  // Enable TypeScript support (auto-detected if tsconfig.json exists)
  typescript: true,

  // Strict mode: all warnings become errors
  strict: true,

  // Frameworks (imports are lazy-loaded)
  frameworks: {
    react,
    next
  },

  // Libraries & Styling
  libraries: [
    Library.Tailwind,
    Library.TanstackQuery,
    Library.TanstackRouter,
    Library.Storybook,
    Library.I18next
  ],

  // Testing Frameworks
  testing: [
    Testing.Vitest,
    Testing.Playwright,
    Testing.TestingLibrary,
    Testing.Cypress
  ],

  // File Formats
  formats: [
    Format.Mdx,
    Format.Markdown,
    Format.Jsonc,
    Format.Graphql,
    Format.Yaml,
    Format.Toml
  ],

  // Standalone Tools
  tools: [
    Tool.Prettier,
    Tool.Cspell,
    Tool.Jsdoc
  ],

  // Specialized Extensions
  extensions: [
    Extension.Unicorn,
    Extension.Sonarjs,
    Extension.Perfectionist,
    Extension.Security,
    Extension.Regexp
  ]
})

Framework Matrix

Framework	Package	Special Notes
TypeScript	typescript: true	Automatically detected from tsconfig.json.
React	@santi020k/eslint-config-react	Base for React, Next.js, Remix, and Expo.
Next.js	@santi020k/eslint-config-next	Dedicated Page. Requires react.
Astro	@santi020k/eslint-config-astro	Dedicated Page.
Vue	@santi020k/eslint-config-vue	Dedicated Page.
Svelte	@santi020k/eslint-config-svelte	Dedicated Page.
Solid	@santi020k/eslint-config-solid	Dedicated Page.
Qwik	@santi020k/eslint-config-qwik	Dedicated Page.
Remix	@santi020k/eslint-config-remix	Dedicated Page. Commonly paired with react in Remix apps.
Angular	@santi020k/eslint-config-angular	Dedicated Page.
NestJS	@santi020k/eslint-config-nest	Dedicated Page.
Expo	@santi020k/eslint-config-expo	Dedicated Page. Requires react.

Optional Tooling

The optional integrations are grouped into five categories:

• Libraries: libraries
• Testing: testing
• Formats: formats
• Tools: tools
• Extensions: extensions

See the dedicated section for the full catalog: Tooling Overview

Common Patterns

Fullstack Remix + Tailwind

import { eslintConfig, Library } from '@santi020k/eslint-config-basic'
import react from '@santi020k/eslint-config-react'
import remix from '@santi020k/eslint-config-remix'

export default eslintConfig({
  frameworks: { react, remix },
  libraries: [Library.Tailwind]
})

Astro + Svelte + Vitest

import astro from '@santi020k/eslint-config-astro'
import { eslintConfig, Testing } from '@santi020k/eslint-config-basic'
import svelte from '@santi020k/eslint-config-svelte'

export default eslintConfig({
  frameworks: { astro, svelte },
  testing: [Testing.Vitest]
})

Strict Mode

Use strict mode when you want warnings promoted to errors.

import { eslintConfig } from '@santi020k/eslint-config-basic'

export default eslintConfig({
  strict: true
})

Strict mode promotes warning severities to errors across the composed config, including array-style rule definitions.

Settings

Gitignore integration is enabled by default.

import { eslintConfig, Setting } from '@santi020k/eslint-config-basic'

export default eslintConfig({
  settings: [Setting.NoGitignore]
})

Recommended Workflow

• Start with eslintConfig().
• Add framework packages explicitly.
• Add optional integrations through enums.
• Use the CLI if you want the first config file scaffolded for you.
• Use the inspector when the final config needs debugging.

Repository Links

• Main Package Source: packages/basic
• Core Types And Detection: packages/core

Related Pages

• CLI
• Inspector
• Basic Package
• Optionals Package
• Core Package