.eslintrc.js

module.exports = {
  'env': {
    'es2021': true,
    'jest': true,
  },
  'extends': ['eslint:recommended', 'plugin:@typescript-eslint/recommended', 'prettier'],
  'parser': '@typescript-eslint/parser',
  'parserOptions': {
    'ecmaVersion': 12,
    'sourceType': 'module',
  },
  'plugins': ['@typescript-eslint'],
  'rules': {
    'linebreak-style': ['error', 'unix'],
    'no-console': 'warn',
    'curly': ['warn', 'multi-line'],
    'semi': ['error', 'always'],
    'quotes': ['error', 'single', { avoidEscape: true }],
    'arrow-parens': ['error', 'always'],
    'eol-last': ['warn', 'always'],
    'multiline-ternary': ['off', 'always-multiline'], // turn off due to conflicts with prettier in jsx
    'no-nested-ternary': 'error',
    'no-empty': ['error', { 'allowEmptyCatch': true }],
    'comma-dangle': ['warn', 'always-multiline'],
    '@typescript-eslint/ban-types': 'off',
    '@typescript-eslint/ban-ts-comment': 'off',
    '@typescript-eslint/no-var-requires': 'off',
    '@typescript-eslint/no-unused-vars': [
      'error',
      {
        'argsIgnorePattern': '^_',
        'varsIgnorePattern': '^_',
      },
    ],
  },
};