.eslintrc.json

{
    "env": {
        "browser": true,
        "es2021": true,
        "node": true
    },
    "extends": "eslint:recommended",
    "overrides": [
        {
            "files": ["server/**/*.js"],
            "parserOptions": {
                "sourceType": "script"
            }
        }
    ],
    "parserOptions": {
        "ecmaVersion": "latest",
        "sourceType": "module",
        "allowImportExportEverywhere": true
    },
    "rules": { 
        "semi": "error",
        "eol-last": "error",
        "no-unexpected-multiline": "error",
        "max-len": ["error", {"code": 200, "tabWidth": 4, "ignoreComments": true, "ignoreTemplateLiterals": true}],
        "no-inline-comments": "error",
        "no-trailing-spaces": "error",
        "quotes": ["error", "single"],
        "prefer-arrow-callback": "error",
        "no-unused-vars": ["error", { "argsIgnorePattern": "^_" }],
        "comma-dangle": ["error", "always-multiline"],
        "dot-notation": "error",
        "eqeqeq": "error",
        "no-alert": "error",
        "indent": ["error", 4, { "SwitchCase": 1 }]
    }
}