.eslintrc.js

const fs = require('fs');

const foldersUnderSrc = fs
  .readdirSync('src', { withFileTypes: true })
  .filter((dirent) => dirent.isDirectory())
  .map((dirent) => dirent.name);

module.exports = {
  parser: '@typescript-eslint/parser',
  parserOptions: {
    project: './tsconfig.json',
  },
  plugins: ['@typescript-eslint', 'jest', 'simple-import-sort'],
  extends: [
    'eslint:recommended',
    'plugin:@typescript-eslint/eslint-recommended',
    'plugin:@typescript-eslint/recommended',
    'prettier',
  ],
  rules: {
    '@typescript-eslint/no-unused-vars': ['warn', { argsIgnorePattern: '^_' }],
    'simple-import-sort/imports': [
      'error',
      {
        groups: [
          // Packages. `react` related packages come first.
          // Things that start with a letter (or digit or underscore), or `@` followed by a letter.
          ['^@?\\w'],
          // Absolute imports and Relative imports.
          [`^(${foldersUnderSrc.join('|')})(/.*|$)`, '^\\.'],
        ],
      },
    ],
    'simple-import-sort/exports': 'error',
    quotes: [
      'error',
      'single',
      { avoidEscape: true, allowTemplateLiterals: false },
    ],
  },
  env: {
    node: true,
    'jest/globals': true,
  },
  ignorePatterns: ['.eslintrc.js'],
};