.eslintrc

{
  "env": {
    "node": true,
    "jest": true
  },
  "root": true,
  "parser": "@typescript-eslint/parser",
  "plugins": [
    "@typescript-eslint",
    "import",
    "prettier",
    "jest"
  ],
  "extends": [
    "standard",
    "eslint:recommended",
    "plugin:@typescript-eslint/eslint-recommended",
    "plugin:@typescript-eslint/recommended",
    "prettier"
  ],
  "rules": {
    "@typescript-eslint/no-empty-interface": "off",
    "@typescript-eslint/no-unused-vars": [
      "error",
      {
        "varsIgnorePattern": "_"
      }
    ],
    "@typescript-eslint/no-var-requires": "off",
    "arrow-parens": [
      "error",
      "as-needed"
    ],
    "import/extensions": [
      2,
      {
        "ts": "never",
        "js": "always",
        "json": "always"
      }
    ],
    "import/no-extraneous-dependencies": [
      "error",
      {
        "devDependencies": [
          "**/*.test.js",
          "webpack.config.js",
          "jest.config.ts"
        ],
        "optionalDependencies": [
          "**/*.test.js"
        ],
        "peerDependencies": [
          "**/*.test.js"
        ]
      }
    ],
    "max-len": [
      "error",
      {
        "code": 80,
        "ignoreComments": true,
        "ignoreRegExpLiterals": true,
        "ignoreTemplateLiterals": true,
        "ignoreTrailingComments": true,
        "ignoreStrings": true,
        "ignoreUrls": true
      }
    ],
    "newline-before-return": "error",
    "object-curly-spacing": [
      "error",
      "always"
    ],
    "object-shorthand": [
      "error",
      "always"
    ],
    "prefer-const": "error",
    "prettier/prettier": [
      "error",
      {
        "arrowParens": "avoid",
        "bracketSpacing": true,
        "printWidth": 80,
        "quoteProps": "as-needed",
        "semi": false,
        "singleQuote": true,
        "tabWidth": 2,
        "trailingComma": "none"
      }
    ],
    "radix": [
      "error",
      "as-needed"
    ],
    "spaced-comment": [
      "error",
      "always"
    ],
    "curly": [
      "error",
      "multi"
    ]
  }
}