.eslintrc.json

{
    "root": true,
    "env": {
        "node": true,
        "browser": true,
        "es6": true,
        "es2021": true
    },
    "parserOptions": {
        "ecmaVersion": "latest",
        "sourceType": "module",
        "requireConfigFile": false
    },
    "parser": "@babel/eslint-parser",
    "plugins": ["@babel", "import"],
    "extends": ["eslint:recommended", "plugin:import/recommended"],
    "settings": {
        "import/resolver": {
            "alias": {
                "map": [["@", "./src"]],
                "extensions": [".js"]
            }
        }
    },
    "ignorePatterns": ["node_modules", "src/storage", "build", "public"],
    "rules": {
        "indent": ["error", 4, {"SwitchCase": 1}],
        "semi": ["error", "always"],
        "no-whitespace-before-property": "error",
        "quotes": ["error", "double", {"avoidEscape": true}],
        "no-cond-assign": ["error", "always"],
        "eqeqeq": ["error", "always"],
        "prefer-const": "error",
        "no-var": "error",
        "no-unused-vars": "warn",
        "require-atomic-updates": ["error", {"allowProperties": true}],
        "no-invalid-this": "error",
        "no-undef-init": "error",
        "no-undefined": "error"
    }
}