.eslintrc.json

{
    "env": {
        "browser": true,
        "es2021": true,
        "jest/globals": true
    },
    "extends": [
        "plugin:react/recommended",
        "plugin:@typescript-eslint/recommended",
        "standard"
    ],
    "parser": "@typescript-eslint/parser",
    "parserOptions": {
        "ecmaFeatures": {
            "jsx": true
        },
        "ecmaVersion": 12,
        "sourceType": "module"
    },
    "plugins": [
        "react",
        "@typescript-eslint",
        "jest"
    ],
    "rules": {
        "no-use-before-define": "off",
        "@typescript-eslint/no-use-before-define": ["error"],
        "@typescript-eslint/ban-types": ["error"],
        "react/jsx-filename-extension": [ "warn", {"extensions": [".tsx"]} ],
        "import/extensions": ["error", "ignorePackages",
            {
                "ts": "never",
                "tsx": "never"
            }
        ],
        "no-shadow": "off",
        "@typescript-eslint/no-shadow": ["error"],
        "camelcase": "off",
        "jest/no-disabled-tests": "warn",
        "jest/no-focused-tests": "error",
        "jest/no-identical-title": "error",
        "jest/prefer-to-have-length": "warn",
        "jest/valid-expect": "error"
    },
    "settings": {
        "import/resolver": {
            "typescript": {}
        },
        "jest": {
            "version": 26
        }
    }
}