.eslintrc

{
  "root": true,
  "env": {
    "es6": true,
    "node": true
  },
  "extends": [
    "eslint:recommended",
    "plugin:import/errors",
    "plugin:import/warnings"
  ],
  "parser": "@typescript-eslint/parser",
  "parserOptions": {
    "ecmaVersion": 6,
    "sourceType": "module",
    "ecmaFeatures": {
      "modules": true
    }
  },
  "plugins": ["@typescript-eslint", "import"],
  "settings": {
    "import/resolver": {
      "node": {
        "extensions": [".js", ".ts"]
      }
    },
    "import/core-modules": [
      "debug",
      "chai",
      "mocha",
      "test-fn"
    ]
  },
  "rules": {
    "array-bracket-newline": [
      "error",
      "consistent"
    ],
    "array-bracket-spacing": [
      "error",
      "never"
    ],
    "array-element-newline": [
      "error",
      "consistent"
    ],
    "block-spacing": [
      "error",
      "always"
    ],
    "brace-style": [
      "error",
      "1tbs"
    ],
    "capitalized-comments": "off",
    "comma-dangle": [
      "error",
      {
        "arrays": "always-multiline",
        "objects": "always-multiline",
        "imports": "always-multiline",
        "exports": "always-multiline",
        "functions": "never"
      }
    ],
    "computed-property-spacing": [
      "error",
      "never"
    ],
    "eol-last": [
      "error",
      "always"
    ],
    "func-call-spacing": [
      "error",
      "never"
    ],
    "function-paren-newline": [
      "error",
      "consistent"
    ],
    "implicit-arrow-linebreak": "off",
    "indent": ["error", 2],
    "jsx-quotes": [
      "error",
      "prefer-double"
    ],
    "key-spacing": [
      "error",
      {
        "beforeColon": false,
        "afterColon": true,
        "mode": "strict"
      }
    ],
    "keyword-spacing": [
      "error",
      {
        "before": true,
        "after": true
      }
    ],
    "linebreak-style": [
      "error",
      "unix"
    ],
    "lines-around-comment": "off",
    "lines-between-class-members": [
      "error",
      "always"
    ],
    "max-len": "off",
    "max-depth": [
      "warn",
      4
    ],
    "max-params": [
      "warn",
      4
    ],
    "max-nested-callbacks": [
      "warn",
      4
    ],
    "multiline-comment-style": [
      "error",
      "separate-lines"
    ],
    "multiline-ternary": [
      "error",
      "always-multiline"
    ],
    "new-cap": "off",
    "newline-per-chained-call": [
      "error",
      {
        "ignoreChainWithDepth": 2
      }
    ],
    "no-bitwise": "off",
    "no-lonely-if": "error",
    "no-mixed-operators": "off",
    "no-mixed-spaces-and-tabs": "error",
    "no-multi-assign": "error",
    "no-multiple-empty-lines": "error",
    "no-negated-condition": "off",
    "no-nested-ternary": "warn",
    "no-new-object": "error",
    "no-trailing-spaces": "error",
    "no-unneeded-ternary": "error",
    "no-whitespace-before-property": "error",
    "object-curly-newline": [
      "error",
      {
        "consistent": true,
        "multiline": true
      }
    ],
    "object-curly-spacing": [
      "error",
      "always",
      {
        "arraysInObjects": true,
        "objectsInObjects": true
      }
    ],
    "object-property-newline": [
      "error",
      {
        "allowAllPropertiesOnSameLine": true
      }
    ],
    "one-var": [
      "error",
      "never"
    ],
    "one-var-declaration-per-line": [
      "error",
      "always"
    ],
    "padding-line-between-statements": [
      "error",
      {
        "blankLine": "always",
        "prev": "import",
        "next": "*"
      },
      {
        "blankLine": "never",
        "prev": "import",
        "next": "import"
      },
      {
        "blankLine": "always",
        "prev": "*",
        "next": "export"
      },
      {
        "blankLine": "any",
        "prev": "export",
        "next": "export"
      },
      {
        "blankLine": "always",
        "prev": "*",
        "next": "return"
      },
      {
        "blankLine": "always",
        "prev": [
          "const",
          "let",
          "var"
        ],
        "next": [
          "block"
        ]
      },
      {
        "blankLine": "always",
        "prev": [
          "block",
          "function"
        ],
        "next": "*"
      },
      {
        "blankLine": "always",
        "prev": "*",
        "next": [
          "block",
          "function"
        ]
      }
    ],
    "prefer-object-spread": "error",
    "quote-props": [
      "error",
      "as-needed"
    ],
    "quotes": [
      "error",
      "single",
      {
        "allowTemplateLiterals": true
      }
    ],
    "semi": [
      "error",
      "never"
    ],
    "sort-keys": "off",
    "sort-vars": [
      "error",
      {
        "ignoreCase": true
      }
    ],
    "space-before-blocks": "error",
    "space-before-function-paren": [
      "error",
      {
        "anonymous": "always",
        "named": "always",
        "asyncArrow": "always"
      }
    ],
    "space-in-parens": [
      "error",
      "never"
    ],
    "space-infix-ops": "error",
    "space-unary-ops": [
      "error",
      {
        "words": true,
        "nonwords": false
      }
    ],
    "spaced-comment": "off",
    "switch-colon-spacing": [
      "error",
      {
        "after": true,
        "before": false
      }
    ],
    "template-tag-spacing": [
      "error",
      "never"
    ],
    "unicode-bom": [
      "error",
      "never"
    ],
    "arrow-body-style": "off",
    "arrow-parens": [
      "error",
      "always"
    ],
    "arrow-spacing": [
      "error",
      {
        "before": true,
        "after": true
      }
    ],
    "generator-star-spacing": [
      "error",
      {
        "before": false,
        "after": true
      }
    ],
    "no-confusing-arrow": [
      "error",
      {
        "allowParens": true
      }
    ],
    "object-shorthand": [
      "error",
      "always"
    ],
    "prefer-arrow-callback": [
      "error",
      {
        "allowNamedFunctions": false,
        "allowUnboundThis": true
      }
    ],
    "prefer-const": "error",
    "prefer-destructuring": "off",
    "prefer-numeric-literals": "off",
    "prefer-rest-params": "error",
    "prefer-spread": "error",
    "prefer-template": "error",
    "require-yield": "error",
    "rest-spread-spacing": [
      "error",
      "never"
    ],
    "sort-imports": "off",
    "symbol-description": "error",
    "template-curly-spacing": [
      "error",
      "never"
    ],
    "yield-star-spacing": [
      "error",
      {
        "before": false,
        "after": true
      }
    ],
    "no-unused-vars": "off",
    "no-undef": "off",
    "no-empty": "off",
    "no-cond-assign": "off",
    "no-console": "off",
    "no-irregular-whitespace": ["error", {
      "skipStrings": true,
      "skipComments": true,
      "skipTemplates": true
    }],
    "import/order": ["error", {
      "groups": ["builtin", "external", "parent", "sibling", "index"]
    }],
    "import/no-extraneous-dependencies": "error",
    "no-multi-spaces": "error"
  }
}