.eslintrc.js

module.exports = {
    "root": true,
    "parser": "@typescript-eslint/parser",
    "plugins": ["@typescript-eslint", "prettier"],
    "env": {
        "node": true,
        "es6": true,
    },
    "extends": [
        // Ideally want to use airbnb config, but that is leading to module not found error for vscode
        // "airbnb",
        "eslint:recommended",
        "plugin:@typescript-eslint/recommended",
        "plugin:eslint-comments/recommended",
        // Disable below extends and parser options if having performance issues
        // https://github.com/typescript-eslint/typescript-eslint/blob/master/docs/getting-started/linting/TYPED_LINTING.md
        'plugin:@typescript-eslint/recommended-requiring-type-checking',
    ],
    "rules": {


        // ---------------------------------------------------------
        // --- Rules from eslint:recommended that we override
        // ---------------------------------------------------------
        "no-unused-vars": "off", // because it flags types that are imported for type declarations (but otherwise unused).
        "no-undef": "off", // because if flags lack of import for Set.  // TODO: fix the issues and remove this override.

        // ---------------------------------------------------------
        // --- Rules that we add and/or customize
        // ---------------------------------------------------------

        "eqeqeq": ["error", "smart"],
        "guard-for-in": "error",
        "id-blacklist": ["error", "any", "Number", "number", "String", "string", "Boolean", "boolean", "Undefined", "undefined"],
        "id-match": "error",
        "import/no-extraneous-dependencies": ["off", { "devDependencies": false }],
        "indent": "off",
        "new-parens": "error",
        "no-caller": "error",
        "no-duplicate-imports": "error",
        "no-eval": "error",
        "no-extra-bind": "error",
        "no-new-func": "error",
        "no-new-wrappers": "error",
        "no-return-await": "error",
        "no-sequences": "error",
        "no-shadow": ["off", { "hoist": "all" }],
        "no-undef-init": "error",
        "no-var": "error",
        "object-shorthand": "error",
        "one-var": ["error", "never"],
        "prefer-const": "error",
        "prefer-object-spread": "error",
        "radix": "error",

        // -- Rules from @typescript-eslint
        "@typescript-eslint/strict-boolean-expressions": ["error"], // avoids frequent sources of errors: 0, "", Promise<T>, null vs undefined
        "@typescript-eslint/adjacent-overload-signatures": "error",
        "@typescript-eslint/array-type": ["error", { "default": "array-simple" }],
        "@typescript-eslint/ban-types": [
            "error",
            {
                "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/consistent-type-definitions": "off",
        "@typescript-eslint/explicit-member-accessibility": ["off", { "accessibility": "explicit" }],
        "@typescript-eslint/interface-name-prefix": "off",
        "@typescript-eslint/member-ordering": "off",
        "@typescript-eslint/no-empty-function": "off",
        "@typescript-eslint/no-empty-interface": "off",
        "@typescript-eslint/no-explicit-any": "off",
        "@typescript-eslint/no-misused-new": "error",
        "@typescript-eslint/no-floating-promises": [ "error"], // prevent those nasty forgotten promises !
        "@typescript-eslint/no-namespace": "off",
        "@typescript-eslint/no-parameter-properties": "off",
        "@typescript-eslint/no-this-alias": "error",
        "@typescript-eslint/no-unused-expressions": "off",
        "@typescript-eslint/no-use-before-define": "off",
        "@typescript-eslint/no-var-requires": "error",
        "@typescript-eslint/prefer-for-of": "error",
        "@typescript-eslint/prefer-function-type": "error",
        "@typescript-eslint/prefer-namespace-keyword": "error",
        "@typescript-eslint/triple-slash-reference": [
            "error",
            {
                "path": "always",
                "types": "prefer-import",
                "lib": "always"
            }
        ],
        "@typescript-eslint/type-annotation-spacing": "error",
        "@typescript-eslint/unified-signatures": "error",
        // TODO: reEnable no-unsafe-assignment
        "@typescript-eslint/no-unsafe-assignment": "off",
        // TODO: reEnable no-unsafe-member-access
        "@typescript-eslint/no-unsafe-member-access": "off",
        // TODO: reEnable restrict-template-expressions
        "@typescript-eslint/restrict-template-expressions": "off",
        // TODO: reEnable no-unused-vars
        "@typescript-eslint/no-unused-vars": "off",
        // TODO: reEnable explicit-module-boundary-types
        "@typescript-eslint/explicit-module-boundary-types": "off"

        // -- Rules form tsdoc
        // "tsdoc/syntax": "warn", // TODO: enable once we have better tsdoc coverage
    },
    // parserOptions: {
    //     project: "./tsconfig.json",
    // },
    "parserOptions": {
        "ecmaVersion": 6,
        "sourceType": "module",
        // Disable below extends and parser options if having performance issues
        // https://github.com/typescript-eslint/typescript-eslint/blob/master/docs/getting-started/linting/TYPED_LINTING.md
        "tsconfigRootDir": __dirname,
        "project": "./tsconfig.json",
    },
    "settings": {
        "import/extensions": [".js",".jsx",".ts",".tsx"],
        "import/parsers": {
          "@typescript-eslint/parser": [".ts",".tsx"]
        },
         "import/resolver": {
             "node": {
                 "extensions": [".js",".jsx",".ts",".tsx"]
            },
            // use <root>/tsconfig.json
            "typescript": {
                // "alwaysTryTypes": true, // always try to resolve types under `<root>@types` directory even it doesn't contain any source code, like `@types/unist`,
                // "directory": "./"
            },
        }
    }
};