.eslintrc.json

{
    "root": true,
    "env": {
        "es2021": true
    },
    "extends": [
        "eslint:recommended",
        "plugin:@typescript-eslint/recommended",
        "plugin:@typescript-eslint/recommended-requiring-type-checking",
        "plugin:import/recommended",
        "plugin:prettier/recommended",
        "plugin:node/recommended"
    ],
    "parser": "@typescript-eslint/parser",
    "parserOptions": {
        "ecmaVersion": 12,
        "project": "./tsconfig.json"
    },
    "plugins": ["@typescript-eslint"],
    "rules": {
        "semi": ["error", "always"],
        "import/no-extraneous-dependencies": ["error", {}],
        "node/no-unsupported-features/es-syntax": "off",
        "node/no-missing-import": ["error", {
            "tryExtensions": [".js", ".ts", ".json", ".node"]
        }],
        "prettier/prettier": "error",
        "block-scoped-var": "error",
        "eqeqeq": "error",
        "no-var": "error",
        "prefer-const": "error",
        "eol-last": "error",
        "prefer-arrow-callback": "error",
        "no-trailing-spaces": "error",
        "quotes": ["warn", "single", { "avoidEscape": true }],
        "no-restricted-properties": [
            "error",
            {
                "object": "describe",
                "property": "only"
            },
            {
                "object": "it",
                "property": "only"
            }
        ],
        // async without await is often an error and in other uses it obfuscates
        // the intent of the developer. Functions are async when they want to await.
        "require-await": "error",
        "import/no-duplicates": "error"
    },
    "settings": {
        "import/resolver": {
            "node": {
                "extensions": [".js", ".jsx", ".ts", ".tsx"]
            }
        }
    }
}