.eslintrc.js

module.exports = {
  parser: '@typescript-eslint/parser',
  plugins: [
    '@typescript-eslint/eslint-plugin',
  ],
  extends: ['airbnb-typescript/base'],
  parserOptions: {
    tsconfigRootDir: __dirname,
    project: ['./tsconfig.json'],
    ecmaVersion: 2018,
  },
  env: {
    node: true,
  },
  globals: {
    document: false,
    navigator: false,
    window: false,
    describe: true,
    it: true,
    should: true,
    beforeEach: true,
    afterEach: true,
    before: true,
    after: true,
  },
  rules: {
    'import/no-cycle': 0,
    semi: 0, // this cause a conflict with typescript rules
    '@typescript-eslint/semi': ['error', 'always'],
    quotes: [
      'error',
      'single',
      {
        avoidEscape: true,
        allowTemplateLiterals: true,
      },
    ],
    camelcase: [
      'error',
      {
        properties: 'never',
      },
    ],
    'tsdoc/syntax': 0, // this is ignored for the moment due to lack of flexibility. See issue: https://github.com/microsoft/tsdoc/issues/220
    'arrow-spacing': [
      'error',
      {
        before: true,
        after: true,
      },
    ],
    'no-mixed-spaces-and-tabs': 'error',
    'no-eval': 'error',
    'block-spacing': ['error', 'always'],
    'comma-spacing': [
      'error',
      {
        before: false,
        after: true,
      },
    ],
    curly: ['error', 'all'],
    'no-unused-expressions': [
      'error',
      {
        allowShortCircuit: true,
        allowTernary: true,
        allowTaggedTemplates: true,
      },
    ],
    'no-unused-vars': [
      'error',
      {
        vars: 'all',
        args: 'none',
        ignoreRestSiblings: true,
      },
    ],
    'import/no-extraneous-dependencies': [
      'error',
      {
        devDependencies: ['test/**/*.ts'],
      },
    ],
    'max-len': [
      'error',
      130,
      2,
      {
        ignoreUrls: true,
        ignoreComments: false,
        ignoreRegExpLiterals: true,
        ignoreStrings: true,
        ignoreTemplateLiterals: true,
      },
    ],
    'brace-style': [
      'error',
      '1tbs',
      {
        allowSingleLine: false,
      },
    ],
    'func-call-spacing': ['error', 'never'],
    'no-param-reassign': [
      'error',
      {
        props: false,
      },
    ],
    'lines-between-class-members': 'off',
    '@typescript-eslint/lines-between-class-members': ['error', 'always', {
      exceptAfterOverload: true,
      exceptAfterSingleLine: true,
    }],
  },
};