.eslintrc.js

module.exports = {
  parser: '@typescript-eslint/parser',
  extends: [
    'eslint:recommended',
    'plugin:import/errors',
    'plugin:import/typescript',
    'prettier',
    'prettier/@typescript-eslint',
  ],
  plugins: ['jest', '@typescript-eslint', 'simple-import-sort', 'import'],
  parserOptions: {
    ecmaVersion: 2018,
    sourceType: 'module',
  },
  env: {
    node: true,
    jest: true,
    es6: true,
  },
  rules: {
    'no-unused-vars': 'off',
    '@typescript-eslint/no-unused-vars': [
      'error',
      {
        argsIgnorePattern: '^_',
        varsIgnorePattern: '^_',
        args: 'after-used',
        ignoreRestSiblings: true,
      },
    ],
    curly: 'error',
    'no-else-return': 0,
    'no-return-assign': [2, 'except-parens'],
    'no-underscore-dangle': 0,
    'jest/no-focused-tests': 2,
    'jest/no-identical-title': 2,
    camelcase: 0,
    'prefer-arrow-callback': [
      'error',
      {
        allowNamedFunctions: true,
      },
    ],
    'class-methods-use-this': 0,
    'no-restricted-syntax': 0,
    'no-param-reassign': [
      'error',
      {
        props: false,
      },
    ],

    'arrow-body-style': 0,
    'no-nested-ternary': 0,

    /*
     * simple-import-sort seems to be the most stable import sorting currently,
     * disable others
     */
    'simple-import-sort/imports': 'error',
    'simple-import-sort/exports': 'error',
    'sort-imports': 'off',
    'import/order': 'off',

    'import/no-deprecated': 'warn',
    'import/no-duplicates': 'error',
  },
};