.eslintrc.js

module.exports = {
  env: {
    browser: true,
    es2021: true,
    'jest/globals': true,
  },
  extends: ['airbnb-base', 'prettier'],
  overrides: [
    {
      files: ['test/**'],
      plugins: ['jest'],
      extends: ['plugin:jest/recommended'],
      rules: { 'jest/prefer-expect-assertions': 'off' },
    },
  ],
  parser: '@typescript-eslint/parser',
  parserOptions: {
    ecmaVersion: 12,
    sourceType: 'module',
  },
  plugins: ['@typescript-eslint', 'jest'],
  rules: {
    'import/prefer-default-export': 'off',
    'import/extensions': 'off',
    'import/no-unresolved': 'off',
    'no-unused-vars': 'off',
    '@typescript-eslint/no-unused-vars': ['error'],
    'jest/no-disabled-tests': 'warn',
    'jest/no-focused-tests': 'error',
    'jest/no-identical-title': 'error',
    'jest/prefer-to-have-length': 'warn',
    'jest/valid-expect': 'error',
    quotes: ['error', 'single'],
    semi: ['error', 'always'],
    'no-underscore-dangle': ['off'],
    'no-bitwise': ['off'],
    'no-multi-assign': ['off'],
    'no-param-reassign': ['error', { props: false }],
    'class-methods-use-this': ['off'],
  },
};