.eslintrc.json

{
  "parser": "@typescript-eslint/parser",
  "parserOptions": {
    "ecmaVersion": 2020,
    "sourceType": "module"
  },
  "plugins": [
    "@typescript-eslint"
  ],
  "extends": [
    "eslint:recommended",
    "plugin:@typescript-eslint/recommended"
  ],
  "ignorePatterns": [
    "**/dist/**"
  ],
  "rules": {
    // TypeScript-ESLint supported rules
    "@typescript-eslint/array-type": [
      "error",
      {
        "default": "array-simple"
      }
    ],
    "@typescript-eslint/ban-types": [
      "error",
      {
        "types": {
          "object": false
        },
        "extendDefaults": true
      }
    ],
    "@typescript-eslint/consistent-type-assertions": [
      "error",
      {
        "assertionStyle": "as",
        "objectLiteralTypeAssertions": "never"
      }
    ],
    "@typescript-eslint/consistent-type-imports": [
      "error",
      {
        "prefer": "type-imports"
      }
    ],
    "@typescript-eslint/explicit-member-accessibility": [
      "error",
      {
        "accessibility": "explicit",
        "overrides": {
          "accessors": "explicit",
          "constructors": "no-public",
          "methods": "explicit",
          "properties": "explicit",
          "parameterProperties": "explicit"
        }
      }
    ],
    "@typescript-eslint/explicit-module-boundary-types": [
      "error",
      {
        "allowArgumentsExplicitlyTypedAsAny": true
      }
    ],
    "@typescript-eslint/member-delimiter-style": [
      "error",
      {
        "multiline": {
          "delimiter": "semi",
          "requireLast": true
        },
        "singleline": {
          "delimiter": "semi",
          "requireLast": true
        },
        "overrides": {
          "typeLiteral": {
            "multiline": {
              "delimiter": "comma",
              "requireLast": true
            },
            "singleline": {
              "delimiter": "comma",
              "requireLast": false
            }
          }
        }
      }
    ],
    "@typescript-eslint/no-confusing-non-null-assertion": "error",
    "@typescript-eslint/no-dynamic-delete": "error",
    "@typescript-eslint/no-explicit-any": "off",
    "@typescript-eslint/no-empty-interface": [
      "warn",
      {
        "allowSingleExtends": true
      }
    ],
    "@typescript-eslint/no-inferrable-types": "off",
    "@typescript-eslint/no-namespace": "off",
    "@typescript-eslint/no-parameter-properties": "error",
    "@typescript-eslint/prefer-for-of": "error",
    "@typescript-eslint/prefer-includes": "off", // Needs static type checking
    "@typescript-eslint/prefer-literal-enum-member": "error",
    "@typescript-eslint/prefer-nullish-coalescing": "off", // Needs static type checking
    "@typescript-eslint/prefer-optional-chain": "error",
    "@typescript-eslint/prefer-readonly": "off", // Needs static type checking
    "@typescript-eslint/prefer-readonly-parameter-types": "off", // Needs static type checking
    "@typescript-eslint/prefer-string-starts-ends-with": "off", // Needs static type checking
    "@typescript-eslint/prefer-ts-expect-error": "error",
    "@typescript-eslint/strict-boolean-expressions": "off", // Needs static type checking
    "@typescript-eslint/switch-exhaustiveness-check": "off", // Needs static type checking
    "@typescript-eslint/type-annotation-spacing": "error",

    // TypeScript-ESLint extension rules
    "brace-style": "off",
    "@typescript-eslint/brace-style": [
      "error",
      "1tbs"
    ],
    "comma-dangle": "off",
    "@typescript-eslint/comma-dangle": [
      "error",
      "always-multiline"
    ],
    "comma-spacing": "off",
    "@typescript-eslint/comma-spacing": "error",
    "default-param-last": "off",
    "@typescript-eslint/default-param-last": "error",
    "func-call-spacing": "off",
    "@typescript-eslint/func-call-spacing": "error",
    "indent": [
      "error",
      4,
      {
        "SwitchCase": 1,
        "FunctionExpression": {
          "parameters": "first"
        },
        "FunctionDeclaration": {
          "parameters": "first"
        },
        "CallExpression": {
          "arguments": "off"
        }
      }
    ],
    "@typescript-eslint/indent": "off", // Apparently, this rule is bugged. So use eslint version for now.
    "keyword-spacing": "off",
    "@typescript-eslint/keyword-spacing": "error",
    "no-array-constructor": "off",
    "@typescript-eslint/no-array-constructor": "error",
    "no-extra-parens": "off",
    "@typescript-eslint/no-extra-parens": "error",
    "no-unused-vars": "off",
    "@typescript-eslint/no-unused-vars": [
      "error",
      {
        "vars": "all",
        "args": "none"
      }
    ],
    "quotes": "off",
    "@typescript-eslint/quotes": "error",
    "semi": "off",
    "@typescript-eslint/semi": "error",
    "space-before-function-paren": "off",
    "@typescript-eslint/space-before-function-paren": [
      "error",
      {
        "anonymous": "always",
        "named": "never",
        "asyncArrow": "always"
      }
    ],

    // ESLint-only rules
    "array-bracket-spacing": [
      "error",
      "never"
    ],
    "array-element-newline": [
      "error",
      "consistent"
    ],
    "block-spacing": [
      "error",
      "always"
    ],
    "comma-style": "error",
    "computed-property-spacing": "error",
    "curly": "error",
    "eol-last": "error",
    "key-spacing": [
      "error",
      {
        "beforeColon": false,
        "afterColon": true,
        "mode": "strict"
      }
    ],
    "lines-between-class-members": [
      "error",
      "always",
      {
        "exceptAfterSingleLine": true
      }
    ],
    "multiline-comment-style": [
      "error",
      "separate-lines"
    ],
    "new-cap": [
      "error",
      {
        "capIsNew": false,
        "properties": false
      }
    ],
    "new-parens": "error",
    "newline-per-chained-call": "off",
    "no-alert": "error",
    "no-caller": "error",
    "no-constant-condition": [
      "error",
      {
        "checkLoops": false
      }
    ],
    "no-else-return": "error",
    "no-eval": "error",
    "no-inner-declarations": "off",
    "no-lonely-if": "off", // Would enable this if it supported detecting comments.
    "no-multi-spaces": [
      "error",
      {
        "ignoreEOLComments": true
      }
    ],
    "no-new-object": "error",
    "no-return-await": "error",
    "no-tabs": "error",
    "no-trailing-spaces": "error",
    "no-useless-return": "error",
    "no-var": "error",
    "no-void": "error",
    "no-whitespace-before-property": "error",
    "object-curly-newline": [
      "error",
      {
        "consistent": true
      }
    ],
    "object-curly-spacing": [
      "error",
      "never"
    ],
    "operator-assignment": [
      "error",
      "always"
    ],
    "operator-linebreak": [
      "error",
      "after"
    ],
    "padded-blocks": [
      "error",
      {
        "blocks": "never",
        "classes": "always",
        "switches": "never"
      }
    ],
    "prefer-const": "error",
    "semi-spacing": [
      "error",
      {
        "before": false,
        "after": true
      }
    ],
    "semi-style": [
      "error",
      "last"
    ],
    "space-before-blocks": [
      "error",
      "always"
    ],
    "space-in-parens": [
      "error",
      "never"
    ],
    "space-infix-ops": "error",
    "space-unary-ops": [
      "error",
      {
        "words": true,
        "nonwords": false
      }
    ],
    "switch-colon-spacing": [
      "error",
      {
        "after": true,
        "before": false
      }
    ],
    "yoda": [
      "error",
      "never",
      {
        "exceptRange": true
      }
    ]
  },
  "reportUnusedDisableDirectives": true
}