.eslintrc.json

{
    "settings": {
        "eslint.validate": ["javascript", "typescript"],
        "import/resolver": {
            "node": {
                "extensions": [".js", ".ts"]
            }
        }
    },
    "env": {
        "browser": true,
        "es6": true,
        "jest": true
    },
    "extends": [
        "airbnb-base"
    ],
    "globals": {
        "Atomics": "readonly",
        "SharedArrayBuffer": "readonly"
    },
    "parser": "@typescript-eslint/parser",
    "parserOptions": {
        "ecmaVersion": 2018,
        "sourceType": "module"
    },
    "plugins": [
        "@typescript-eslint"
    ],
    "rules": {
        "indent": ["error", 4],
        "comma-dangle": ["error", "never"],
        "import/no-extraneous-dependencies": ["error", {"devDependencies": ["**/*.spec.ts"]}],
        "import/extensions": ["error", "ignorePackages", { "js": "never", "ts": "never" }]
    }
}