.eslintrc.json

{
  "env": {
    "node": true,
    "mocha": true,
    "es6": true
  },
  "plugins": ["mocha", "@typescript-eslint", "prettier"],
  "extends": [
    "eslint:recommended",
    "plugin:@typescript-eslint/eslint-recommended",
    "plugin:@typescript-eslint/recommended",
    "prettier/@typescript-eslint",
    "plugin:prettier/recommended"
  ],
  "parserOptions": {
    "ecmaVersion": 2018,
    "sourceType": "module",
    "ecmaFeatures": {
      "modules": true
    }
  },
  "rules": {
    "comma-dangle": ["error", "always-multiline"],
    "no-cond-assign": "error",
    "no-console": "off",
    "no-unused-expressions": "error",
    "no-const-assign": "error",
    "array-bracket-spacing": ["error", "never"],
    "block-spacing": ["error", "always"],
    "brace-style": [
      "error",
      "1tbs",
      {
        "allowSingleLine": true
      }
    ],
    "camelcase": [
      "error",
      {
        "properties": "always"
      }
    ],
    "comma-spacing": [
      "error",
      {
        "before": false,
        "after": true
      }
    ],
    "comma-style": ["error", "last"],
    "computed-property-spacing": ["error", "never"],
    "eol-last": ["error", "unix"],
    "func-names": 0,
    "func-call-spacing": ["error", "never"],
    "function-paren-newline": ["error", "consistent"],
    "indent": [
      "error",
      2,
      {
        "SwitchCase": 1
      }
    ],
    "key-spacing": [
      "error",
      {
        "beforeColon": false,
        "afterColon": true,
        "mode": "strict"
      }
    ],
    "keyword-spacing": [
      "error",
      {
        "before": true,
        "after": true
      }
    ],
    "max-len": [
      "error",
      100,
      4,
      {
        "ignoreComments": true,
        "ignoreUrls": true,
        "ignorePattern": "^\\s*var\\s.+=\\s*require\\s*\\("
      }
    ],
    "mocha/handle-done-callback": "error",
    "mocha/no-exclusive-tests": "error",
    "mocha/no-identical-title": "error",
    "mocha/no-nested-tests": "error",
    "no-array-constructor": 2,
    "no-extra-semi": "error",
    "no-multi-spaces": "error",
    "no-multiple-empty-lines": [
      "error",
      {
        "max": 1
      }
    ],
    "no-redeclare": ["error"],
    "no-trailing-spaces": 2,
    "no-undef": "error",
    "no-var": "error",
    // "object-curly-spacing": ["error", "never"],
    "one-var": [
      "error",
      {
        "initialized": "never",
        "uninitialized": "always"
      }
    ],
    "operator-linebreak": ["error", "before"],
    "padded-blocks": ["error", "never"],
    "prefer-const": "error",
    "quotes": ["error", "single", "avoid-escape"],
    "semi-spacing": [
      "error",
      {
        "before": false,
        "after": true
      }
    ],
    "semi": ["error", "always"],
    "space-before-blocks": ["error", "always"],
    "space-before-function-paren": [
      "error",
      {
        "anonymous": "never",
        "named": "never",
        "asyncArrow": "always"
      }
    ],
    "space-in-parens": ["error", "never"],
    "space-infix-ops": [
      "error",
      {
        "int32Hint": false
      }
    ],
    "spaced-comment": [
      "error",
      "always",
      {
        "line": {
          "markers": ["/"],
          "exceptions": ["-"]
        },
        "block": {
          "balanced": true,
          "markers": ["!"],
          "exceptions": ["*"]
        }
      }
    ],
    "strict": ["error", "global"]
  }
}