.eslintrc.json

{
  "root": true,
  "parser": "@typescript-eslint/parser",
  "extends": [
    "plugin:@typescript-eslint/eslint-recommended",
    "plugin:@typescript-eslint/recommended",
    "prettier"
  ],
  "plugins": ["@typescript-eslint"],
  "env": {
    "browser": true,
    "node": true,
    "es6": true
  },
  "parserOptions": {
    "ecmaVersion": "latest",
    "sourceType": "module"
  },
  "rules": {
    "array-callback-return": [
      "error",
      {
        "allowImplicit": false,
        "checkForEach": true,
        "allowVoid": true
      }
    ],
    "@typescript-eslint/no-explicit-any": "off",
    "no-constant-binary-expression": "error",
    "no-constructor-return": "error",
    "no-duplicate-imports": ["error", { "includeExports": true }],
    "no-new-native-nonconstructor": "error",
    "no-promise-executor-return": ["error", { "allowVoid": true }],
    "no-self-compare": "error",
    "no-template-curly-in-string": "error",
    "no-unmodified-loop-condition": "error",
    "no-unreachable-loop": "error",
    "no-unused-private-class-members": "error",
    "arrow-body-style": ["error", "as-needed"],
    "camelcase": [
      "error",
      {
        "properties": "always",
        "ignoreDestructuring": true,
        "ignoreImports": true,
        "ignoreGlobals": true
      }
    ],
    "class-methods-use-this": ["error", { "enforceForClassFields": true }],
    "complexity": ["warn", 40],
    "consistent-return": "error",
    "curly": ["error", "all"],
    "default-param-last": "error",
    "dot-notation": "error",
    "eqeqeq": ["error", "always"],
    "func-name-matching": "error",
    "func-names": "error",
    "func-style": ["error", "declaration", { "allowArrowFunctions": true }],
    "grouped-accessor-pairs": ["error", "getBeforeSet"],
    "guard-for-in": "error",
    "init-declarations": ["error", "always"],
    "logical-assignment-operators": [
      "error",
      "always",
      { "enforceForIfStatements": true }
    ],
    "max-classes-per-file": ["error", { "ignoreExpressions": true }],
    "max-depth": ["error", 3],
    "max-nested-callbacks": ["error", 3],
    "max-params": ["error", 4],
    "multiline-comment-style": ["error", "separate-lines"],
    "new-cap": "error",
    "no-alert": "error",
    "no-bitwise": "error",
    "no-caller": "error",
    "no-else-return": "error",
    "no-empty-function": "error",
    "no-empty-static-block": "error",
    "no-eq-null": "error",
    "no-eval": "error",
    "no-extend-native": "error",
    "no-extra-label": "error",
    "no-implicit-coercion": "error",
    "no-implicit-globals": "error",
    "no-implied-eval": "error",
    "no-inline-comments": "error",
    "no-invalid-this": "error",
    "no-iterator": "error",
    "no-labels": "error",
    "no-lone-blocks": "error",
    "no-lonely-if": "error",
    "no-loop-func": "error",
    "no-multi-assign": "error",
    "no-multi-str": "error",
    "no-nested-ternary": "error",
    "no-new": "error",
    "no-new-func": "error",
    "no-new-wrappers": "error",
    "no-object-constructor": "error",
    "no-octal-escape": "error",
    "no-param-reassign": "error",
    "no-plusplus": "error",
    "no-proto": "error",
    "no-return-assign": ["error", "always"],
    "no-script-url": "error",
    "no-sequences": "error",
    "no-shadow": "error",
    "no-throw-literal": "error",
    "no-undef-init": "error",
    "no-underscore-dangle": ["error", { "allowFunctionParams": false }],
    "no-unneeded-ternary": ["error", { "defaultAssignment": false }],
    "no-unused-expressions": ["error", { "enforceForJSX": true }],
    "no-unused-vars": ["error", { "argsIgnorePattern": "^_" }],
    "no-useless-call": "error",
    "no-useless-computed-key": ["error", { "enforceForClassMembers": true }],
    "no-useless-concat": "error",
    "no-useless-constructor": "error",
    "no-useless-rename": "error",
    "no-useless-return": "error",
    "no-var": "error",
    "no-warning-comments": [
      "error",
      {
        "terms": ["todo"]
      }
    ],
    "object-shorthand": ["error", "always"],
    "one-var": ["error", "never"],
    "operator-assignment": ["error", "always"],
    "prefer-arrow-callback": "error",
    "prefer-const": [
      "error",
      {
        "destructuring": "any",
        "ignoreReadBeforeAssign": false
      }
    ],
    "prefer-destructuring": "error",
    "prefer-exponentiation-operator": "error",
    "prefer-numeric-literals": "error",
    "prefer-object-has-own": "error",
    "prefer-object-spread": "error",
    "prefer-promise-reject-errors": "error",
    "prefer-regex-literals": ["error", { "disallowRedundantWrapping": true }],
    "prefer-rest-params": "error",
    "prefer-spread": "error",
    "prefer-template": "error",
    "radix": "error",
    "require-await": "error",
    "require-unicode-regexp": "error",
    "symbol-description": "error",
    "yoda": "error",
    "line-comment-position": ["error", { "position": "above" }],
    // recommended rules overwrite
    "indent": "off",
    "linebreak-style": ["error", "unix"],
    "newline-before-return": "error",
    "no-undef": "error",
    "padded-blocks": ["error", "never"],
    "padding-line-between-statements": [
      "error",
      {
        "blankLine": "always",
        "prev": "*",
        "next": [
          "break",
          "case",
          "cjs-export",
          "class",
          "continue",
          "do",
          "if",
          "switch",
          "try",
          "while",
          "return"
        ]
      },
      {
        "blankLine": "always",
        "prev": [
          "break",
          "case",
          "cjs-export",
          "class",
          "continue",
          "do",
          "if",
          "switch",
          "try",
          "while",
          "return"
        ],
        "next": "*"
      },
      {
        "blankLine": "never",
        "prev": ["const", "export"],
        "next": "const"
      }
    ],
    "quotes": [
      "error",
      "double",
      {
        "avoidEscape": true,
        "allowTemplateLiterals": true
      }
    ],
    "space-before-blocks": "error",
    "semi": ["error", "never"]
  }
}