/ts-library

@antfu/eslint-config

Flat ESLint config that handles both linting and formatting - replaces Prettier.

Setup

pnpm add -D eslint @antfu/eslint-config

// eslint.config.mjs
import antfu from '@antfu/eslint-config'

export default antfu()

{ "scripts": { "lint": "eslint ." } }

Configuration Options

import antfu from '@antfu/eslint-config'

export default antfu({
  type: 'lib',        // 'lib' for libraries, 'app' for applications
  ignores: ['**/fixtures', '**/dist'],
  stylistic: { indent: 2, quotes: 'single' },
  typescript: true,   // Auto-detected
  vue: true,          // Auto-detected
})

Framework Support

Formatters (CSS, HTML, Markdown)

For files ESLint doesn't handle natively:

export default antfu({
  formatters: {
    css: true,      // Prettier for CSS/LESS/SCSS
    html: true,     // Prettier for HTML
    markdown: 'prettier' // or 'dprint'
  }
})
// Requires: pnpm add -D eslint-plugin-format

Rule Overrides

Global

export default antfu(
  { /* config options */ },
  { rules: { 'style/semi': ['error', 'never'] } }
)

Per-integration

export default antfu({
  vue: { overrides: { 'vue/operator-linebreak': ['error', 'before'] } },
  typescript: { overrides: { 'ts/consistent-type-definitions': ['error', 'interface'] } },
})

Plugin Prefix Renaming

// eslint-disable-next-line ts/consistent-type-definitions

Type-Aware Rules

export default antfu({
  typescript: { tsconfigPath: 'tsconfig.json' },
})

VS Code Settings

{
  "prettier.enable": false,
  "editor.formatOnSave": false,
  "editor.codeActionsOnSave": { "source.fixAll.eslint": "explicit", "source.organizeImports": "never" },
  "eslint.rules.customizations": [
    { "rule": "style/*", "severity": "off", "fixable": true },
    { "rule": "format/*", "severity": "off", "fixable": true },
    { "rule": "*-indent", "severity": "off", "fixable": true },
    { "rule": "*-spacing", "severity": "off", "fixable": true }
  ],
  "eslint.validate": ["javascript", "typescript", "vue", "html", "markdown", "json", "yaml"]
}