.eslintrc.js

module.exports = {
  env: {
    browser: true,
    es6: true,
    node: true
  },
  parser: '@typescript-eslint/parser',
  parserOptions: {
    project: './tsconfig.json',
    sourceType: 'module',
    ecmaVersion: 2018
  },
  extends: [
    'plugin:@typescript-eslint/recommended',
    'plugin:@typescript-eslint/eslint-recommended',
    'plugin:@typescript-eslint/recommended-requiring-type-checking'
  ],
  rules: {
    '@typescript-eslint/member-delimiter-style': [
      'error',
      {
        multiline: {
          delimiter: 'semi',
          requireLast: true
        },
        singleline: {
          delimiter: 'semi',
          requireLast: false
        }
      }
    ],
    '@typescript-eslint/prefer-namespace-keyword': 'error',
    '@typescript-eslint/quotes': [
      'error',
      'single',
      {
        avoidEscape: true
      }
    ],
    '@typescript-eslint/semi': ['error', 'always'],
    '@typescript-eslint/type-annotation-spacing': 'error',
    '@typescript-eslint/indent': [2, 2],
    'arrow-parens': ['error', 'as-needed']
  }
};