.eslintrc.json

{
    "env": {
        "browser": true,
        "es2021": true,
        "node": true,
        "jest": true
    },
    "extends": ["airbnb-base", "plugin:prettier/recommended", "prettier"],
    "parserOptions": {
        "ecmaVersion": "latest",
        "sourceType": "module"
    },
    "plugins": ["jest", "prettier"],
    "rules": {
        "prettier/prettier": ["error"],
        "indent": ["error", 4],
        "no-underscore-dangle": ["error", { "allowAfterThis": true }],
        "linebreak-style": ["error", "unix"],
        "semi": ["error", "never"],
        "comma-dangle": ["error", "never"],
        "no-plusplus": ["error", { "allowForLoopAfterthoughts": true }],
        "valid-jsdoc": "error",

        "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"
    }
}