.eslintrc.json

{
    "env": {
        "es6": true,
        "node": true,
        "jest": true,
        "jest/globals": true
    },
    "overrides": [
        {
            "files": ".js,.ts"
        }
    ],
    "parser": "@typescript-eslint/parser",
    "parserOptions": {
        "project": "./tsconfig.json",
        "ecmaVersion": 2018,
        "sourceType": "module"
    },
    "plugins": ["node", "@typescript-eslint", "import", "jest", "security"],
    "extends": [
        "eslint:recommended",
        "plugin:node/recommended",
        "plugin:import/errors",
        "plugin:import/warnings",
        "plugin:@typescript-eslint/eslint-recommended",
        "plugin:@typescript-eslint/recommended",
        "plugin:security/recommended"
    ],
    "settings": {
        "import/parsers": {
            "@typescript-eslint/parser": [".ts", ".tsx"]
        },
        "import/resolver": {
            "typescript": {
                "alwaysTryTypes": true
            }
        }
    },
    "rules": {
        // code
        "max-params": ["warn", 3],
        "max-depth": ["error", 3],
        "max-statements-per-line": [
            "error",
            {
                "max": 1
            }
        ],
        "max-lines": [
            "error",
            {
                "max": 250,
                "skipBlankLines": true,
                "skipComments": true
            }
        ],
        "max-lines-per-function": [
            "warn",
            {
                "max": 50,
                "skipBlankLines": true,
                "skipComments": true
            }
        ],
        "@typescript-eslint/ban-ts-comment": ["warn"],
        "@typescript-eslint/interface-name-prefix": [0, "never"],
        "arrow-parens": ["error"],
        "quote-props": [
            "error",
            "consistent-as-needed",
            {
                "numbers": true
            }
        ],
        "no-unused-vars": "error",
        "no-useless-escape": "error",
        "no-empty-pattern": "error",
        "no-eval": "error",
        "no-implied-eval": "error",
        "no-prototype-builtins": "error",
        "node/no-sync": 0,
        "node/exports-style": ["error", "module.exports"],
        "node/no-unpublished-require": 0,
        "node/no-extraneous-import": 0,
        "node/no-deprecated-api": ["warn"],
        "node/no-missing-require": [
            "error",
            {
                "tryExtensions": [".ts", ".js", ".d.ts", ".json", ".node"]
            }
        ],
        "node/no-missing-import": 0,
        "node/no-unpublished-import": 0,
        "node/no-unsupported-features/es-syntax": 0,
        "import/extensions": [
            "error",
            {
                "ts": "never",
                "js": "never",
                "json": "always"
            }
        ],
        "import/named": "warn",
        "import/no-duplicates": "error",
        "import/no-unresolved": "error",
        "@typescript-eslint/no-unused-vars": "warn",
        "@typescript-eslint/consistent-type-imports": ["error", { "prefer": "type-imports" }],
        // Style
        "max-len": [
            "error",
            {
                "code": 200
            }
        ],
        "indent": [
            "error",
            4,
            {
                "SwitchCase": 1
            }
        ],
        "linebreak-style": ["error", "windows"],
        "quotes": ["error", "double"],
        "semi": ["error", "always"],
        "brace-style": ["error", "stroustrup"],
        "object-curly-spacing": ["error", "always"],
        "no-mixed-spaces-and-tabs": "error",
        "arrow-spacing": ["error"],
        "comma-dangle": ["error", "never"],
        "comma-style": ["error"],
        "no-extra-semi": "error",
        "comma-spacing": "error",
        "space-in-parens": ["error", "never"],
        "space-before-blocks": "error",
        "space-before-function-paren": ["error", { "anonymous": "never", "named": "never", "asyncArrow": "always" }],
        "keyword-spacing": "error",
        "one-var": ["error", "never"]
    }
}