.eslintrc.js

module.exports = {
  root: true,
  parser: '@typescript-eslint/parser',
  parserOptions: {
    tsconfigRootDir: __dirname,
    project: ['./tsconfig.json'],
  },
  plugins: [
    '@typescript-eslint',
    'jest',
    'simple-import-sort',
    'jest-formatting',
  ],
  extends: [
    'eslint:recommended',
    'plugin:@typescript-eslint/eslint-recommended',
    'plugin:@typescript-eslint/recommended',
    'plugin:@typescript-eslint/recommended-requiring-type-checking',
    'plugin:import/errors',
    'plugin:import/warnings',
    'plugin:jest/recommended',
    'plugin:jest-formatting/recommended',
    'prettier',
  ],
  rules: {
    'newline-before-return': 'error',
    '@typescript-eslint/no-unused-vars': ['error', { argsIgnorePattern: '^_' }],
    'simple-import-sort/imports': 'error',
    'sort-imports': 'off',
    'import/first': 'error',
    'import/newline-after-import': 'error',
    'import/no-duplicates': 'error',
    'no-multiple-empty-lines': 'error',
    'lines-between-class-members': 'off',
    '@typescript-eslint/lines-between-class-members': ['error', 'always', { exceptAfterSingleLine: true, exceptAfterOverload: true }],
    '@typescript-eslint/require-await': 'off',
    'spaced-comment': ['error', 'always'],
    'quotes': 'off',
    '@typescript-eslint/quotes': ['warn', 'single', { avoidEscape: true, allowTemplateLiterals: true }],
    '@typescript-eslint/no-inferrable-types': ['warn'],
    'no-implicit-coercion': 'error',
    '@typescript-eslint/strict-boolean-expressions': 'error',
    '@typescript-eslint/explicit-member-accessibility': [
      'error',
      { accessibility: 'explicit', overrides: { constructors: 'no-public' } },
    ],
    '@typescript-eslint/consistent-type-imports': ['error', { prefer: 'type-imports' }],
  },
  settings: {
    'import/parsers': {
      '@typescript-eslint/parser': ['.ts'],
    },
    'import/resolver': {
      typescript: {
        alwaysTryTypes: true,
      },
    },
  },
  overrides: [{
    files: '*.test.ts',
    rules: {
      '@typescript-eslint/no-explicit-any': 'off',
      '@typescript-eslint/no-unsafe-return': 'off',
      '@typescript-eslint/no-unsafe-assignment': 'off',
      '@typescript-eslint/no-non-null-assertion': 'off',
      '@typescript-eslint/unbound-method': 'off',
    }
  }],
};