.eslintrc.json

{
    "root": true,
    "env": {
        "browser": true,
        "es2018": true,
        "greasemonkey": true
    },
    "extends": ["eslint:recommended", "plugin:compat/recommended"],
    "rules": {
        "no-unused-vars": "off",
        "no-undef": "off",
        "no-extra-semi": "warn",
        "no-useless-escape": "warn",
        "array-callback-return": "warn",
        "no-await-in-loop": "warn",
        "no-constructor-return": "warn",
        "no-promise-executor-return": "warn",
        "no-self-compare": "warn",
        "no-template-curly-in-string": "warn",
        "no-unmodified-loop-condition": "warn",
        "no-unreachable-loop": "warn",
        "no-use-before-define": "warn",
        "no-caller": "warn",
        "no-eval": "warn",
        "no-implied-eval": "warn",
        "no-extend-native": "warn",
        "no-extra-bind": "warn",
        "no-floating-decimal": "warn"
    },
    "globals": {
        "DOMPurify": "readonly",
        "localforage": "readonly",
        "showdown": "readonly"
    },
    "settings": {
        "polyfills": [
            "String.prototype.includes",
            "BroadcastChannel",
            "Array.prototype.flat"
        ]
    }
}