.eslintrc.json

{
  "root": true,
  "env": {
    "browser": true,
    "es6": true,
    "node": true
  },
  "extends": [
    "eslint:recommended",
    "plugin:@typescript-eslint/recommended",
    "plugin:@typescript-eslint/eslint-recommended",
    "plugin:@typescript-eslint/recommended-requiring-type-checking"
  ],
  "parser": "@typescript-eslint/parser",
  "parserOptions": {
    "project": "tsconfig.json",
    "sourceType": "module"
  },
  "plugins": [
    "eslint-plugin-import",
    "eslint-plugin-prefer-arrow",
    "@typescript-eslint",
    "@typescript-eslint/eslint-plugin"
  ],
  "rules": {
    "@typescript-eslint/adjacent-overload-signatures": "error",
    "@typescript-eslint/array-type": [
      "error",
      {
        "default": "array"
      }
    ],
    "@typescript-eslint/await-thenable": "error",
    "@typescript-eslint/ban-ts-comment": "warn",
    "@typescript-eslint/ban-types": [
      "warn",
      {
        "types": {
          "Object": {
            "message": "Avoid using the `Object` type. Did you mean `object`?"
          },
          "Function": {
            "message": "Avoid using the `Function` type. Prefer a specific function type, like `() => void`."
          },
          "Boolean": {
            "message": "Avoid using the `Boolean` type. Did you mean `boolean`?"
          },
          "Number": {
            "message": "Avoid using the `Number` type. Did you mean `number`?"
          },
          "String": {
            "message": "Avoid using the `String` type. Did you mean `string`?"
          },
          "Symbol": {
            "message": "Avoid using the `Symbol` type.  Did you mean `symbol`?"
          }
        }
      }
    ],
    "@typescript-eslint/consistent-type-assertions": "error",
    "@typescript-eslint/dot-notation": "error",
    "@typescript-eslint/explicit-module-boundary-types": "warn",
    "@typescript-eslint/indent": [
      "error",
      2
    ],
    "@typescript-eslint/member-delimiter-style": [
      "error",
      {
        "multiline": {
          "delimiter": "none",
          "requireLast": false
        },
        "singleline": {
          "delimiter": "comma",
          "requireLast": false
        }
      }
    ],
    "@typescript-eslint/member-ordering": "off",
    "@typescript-eslint/naming-convention": "off",
    "@typescript-eslint/no-array-constructor": "error",
    "@typescript-eslint/no-empty-function": "error",
    "@typescript-eslint/no-empty-interface": "error",
    "@typescript-eslint/no-explicit-any": "off",
    "@typescript-eslint/no-extra-non-null-assertion": "error",
    "@typescript-eslint/no-extra-semi": "error",
    "@typescript-eslint/no-floating-promises": "error",
    "@typescript-eslint/no-for-in-array": "error",
    "@typescript-eslint/no-implied-eval": "off",
    "@typescript-eslint/no-inferrable-types": "error",
    "@typescript-eslint/no-misused-new": "error",
    "@typescript-eslint/no-misused-promises": "error",
    "@typescript-eslint/no-namespace": "error",
    "@typescript-eslint/no-non-null-asserted-optional-chain": "error",
    "@typescript-eslint/no-non-null-assertion": "warn",
    "@typescript-eslint/no-parameter-properties": "off",
    "@typescript-eslint/no-shadow": [
      "error",
      {
        "hoist": "all"
      }
    ],
    "@typescript-eslint/no-this-alias": "error",
    "@typescript-eslint/no-unnecessary-type-assertion": "error",
    "@typescript-eslint/no-unsafe-assignment": "off",
    "@typescript-eslint/no-unsafe-call": "off",
    "@typescript-eslint/no-unsafe-member-access": "off",
    "@typescript-eslint/no-unsafe-return": "error",
    "@typescript-eslint/no-unused-expressions": "error",
    "@typescript-eslint/no-unused-vars": [
      "error",
      {
        "argsIgnorePattern": "^_"
      }
    ],
    "@typescript-eslint/no-use-before-define": "off",
    "@typescript-eslint/no-var-requires": "off",
    "@typescript-eslint/prefer-as-const": "error",
    "@typescript-eslint/prefer-for-of": "error",
    "@typescript-eslint/prefer-function-type": "error",
    "@typescript-eslint/prefer-namespace-keyword": "error",
    "@typescript-eslint/prefer-regexp-exec": "off",
    "@typescript-eslint/quotes": [
      "error",
      "single",
      {
        "avoidEscape": true
      }
    ],
    "@typescript-eslint/require-await": "error",
    "@typescript-eslint/restrict-plus-operands": "error",
    "@typescript-eslint/restrict-template-expressions": "off",
    "@typescript-eslint/semi": [
      "error",
      "never"
    ],
    "@typescript-eslint/triple-slash-reference": [
      "error",
      {
        "path": "always",
        "types": "prefer-import",
        "lib": "always"
      }
    ],
    "@typescript-eslint/unbound-method": "error",
    "@typescript-eslint/unified-signatures": "error",
    "arrow-body-style": "error",
    "arrow-parens": [
      "error",
      "as-needed"
    ],
    "brace-style": [
      "error",
      "stroustrup",
      {
        "allowSingleLine": true
      }
    ],
    "comma-dangle": [
      "error",
      {
        "objects": "always-multiline",
        "arrays": "always-multiline",
        "functions": "never"
      }
    ],
    "complexity": "off",
    "constructor-super": "error",
    "curly": [
      "error",
      "multi-line"
    ],
    "eol-last": "error",
    "eqeqeq": [
      "error",
      "smart"
    ],
    "guard-for-in": "error",
    "id-blacklist": [
      "error",
      "any",
      "Number",
      "number",
      "String",
      "string",
      "Boolean",
      "boolean",
      "Undefined",
      "undefined"
    ],
    "id-match": "error",
    "import/order": "off",
    "linebreak-style": [
      "error",
      "unix"
    ],
    "max-classes-per-file": "off",
    "max-len": [
      "warn",
      {
        "code": 240
      }
    ],
    "new-parens": "off",
    "no-array-constructor": "off",
    "no-bitwise": "error",
    "no-caller": "error",
    "no-cond-assign": "off",
    "no-console": "error",
    "no-debugger": "error",
    "no-empty": [
      "error",
      {
        "allowEmptyCatch": true
      }
    ],
    "no-empty-function": "off",
    "no-eval": "error",
    "no-extra-semi": "off",
    "no-fallthrough": "off",
    "no-implied-eval": "off",
    "no-invalid-this": "off",
    "no-irregular-whitespace": "error",
    "no-magic-numbers": "off",
    "@typescript-eslint/no-magic-numbers": [ "error", {
      "ignore": [ -1, 0, 1, 2 ],
      "ignoreEnums": true
    }],
    "no-new-wrappers": "error",
    "no-redeclare": "error",
    "no-throw-literal": "error",
    "no-trailing-spaces": "error",
    "no-undef-init": "error",
    "no-underscore-dangle": [
      "error",
      {
        "allowAfterThis": true
      }
    ],
    "no-unsafe-finally": "error",
    "no-unused-labels": "error",
    "no-unused-vars": "off",
    "no-var": "error",
    "object-shorthand": "error",
    "one-var": [
      "off",
      "never"
    ],
    "prefer-arrow/prefer-arrow-functions": [
      "error",
      {
        "allowStandaloneDeclarations": true
      }
    ],
    "prefer-const": [
      "error",
      {
        "destructuring": "all"
      }
    ],
    "prefer-object-spread": "error",
    "prefer-template": "error",
    "quote-props": [
      "error",
      "as-needed"
    ],
    "radix": "off",
    "require-await": "off",
    "space-before-function-paren": [
      "error",
      {
        "anonymous": "never",
        "named": "never",
        "asyncArrow": "always"
      }
    ],
    "spaced-comment": [
      "error",
      "always",
      {
        "markers": [
          "/"
        ]
      }
    ],
    "use-isnan": "error",
    "valid-typeof": "off",
    "yoda": "error",
    "@typescript-eslint/consistent-type-definitions": "off",
    "no-new-func": "off"
  },
  "ignorePatterns": [
    "webpack.config.ts",
    "util/*.ts",
    "minitests/*.ts",
    "content/minitests/*.ts"
  ]
}