.eslintrc.js

module.exports = {
    root: true,

    // Extend from recommened eslint rules
    // Indicated by a wrench @ https://eslint.org/docs/rules/
    extends: ["eslint:recommended", "plugin:@typescript-eslint/recommended"],

    parser: "@typescript-eslint/parser",

    // "parser": "babel-parser",
    parserOptions: {
        // "parser": "babel-parser",
        ecmaVersion: "2022"
    },

    plugins: ["@typescript-eslint"],

    env: {
        node: true,
        browser: true,
        es6: true,
        es2020: true
    },

    // Project specific globals
    globals: {
        renderWindow: true,
        $: true,
        firebotAppDetails: true
    },

    rules: {
        // Deviations from https://eslint.org/docs/rules/#possible-errors
        "no-console": 0, // Enable the use of console

        // Deviations from < https://eslint.org/docs/rules/#best-practices >
        eqeqeq: ["warn", "smart"], // No coersion unless comparing against null
        "guard-for-in": "warn", // require an if statement with for-in loops
        "no-else-return": "warn", // no 'if () { return } else { ... }
        "no-eval": "warn", // no eval()
        "no-floating-decimal": "warn", // no trailing decimals after numbers
        "no-lone-blocks": "warn", // see: https://eslint.org/docs/rules/no-lone-blocks
        "no-multi-spaces": "warn", // no repeating spaces
        "no-throw-literal": "warn", // must throw an error instance
        "no-unused-expressions": "warn", // see: https://eslint.org/docs/rules/no-unused-expressions#disallow-unused-expressions-no-unused-expressions
        "no-with": "warn", // no with statements
        "wrap-iife": ["warn", "any"], // immediately called functions must be wrapped in ()'s
        "no-async-promise-executor": "off",
        "no-prototype-builtins": "off",

        // Deviation from < https://eslint.org/docs/rules/#strict-mode >
        strict: "off", // disabled b/c typescript

        // Deviation from < https://eslint.org/docs/rules/#variables >
        "no-use-before-define": "warn", // require vars to be defined before use

        "prefer-const": "warn",

        // Deviation from < https://eslint.org/docs/rules/#stylistic-issues >
        "arrow-parens": ["warn", "as-needed", { requireForBlockBody: true }], // Parentheses around arrow function parameters
        "array-bracket-spacing": "warn", // Spaces around array []'s
        "block-spacing": "warn", // {}'s must have whitespace around them
        "brace-style": "warn", // See: https://eslint.org/docs/rules/brace-style#require-brace-style-brace-style
        camelcase: "warn", // useCamelCasePleaseKThanks
        "comma-dangle": "warn", // No trailing commas
        "comma-spacing": "warn", // Reqire space after commas
        "comma-style": "warn", // See: https://eslint.org/docs/rules/comma-style
        "computed-property-spacing": "warn", // No whitespace when using object[thing]
        curly: "warn", // Must wrap blocks with {}
        indent: "off", // Superseded by TS
        "key-spacing": ["warn", { mode: "strict" }], // Exactly one space after object key colons
        "keyword-spacing": "warn", // Spaces around keywords
        "linebreak-style": "warn", // Line breaks must be \n
        "new-cap": "warn", // Constructors must start with capital letter
        "no-trailing-spaces": "warn", // no trailing spaces
        semi: "warn", // semi-colons required
        "semi-spacing": ["warn", { before: false, after: true }], // space after semi-colon, no space before
        "semi-style": "warn", // See: https://eslint.org/docs/rules/semi-style
        "space-before-blocks": "warn", // whitespace required before and after {}
        "space-in-parens": ["warn", "never"], // See: https://eslint.org/docs/rules/space-in-parens
        "space-infix-ops": "warn", // Spaces required areound operators
        "space-unary-ops": "warn", // See: https://eslint.org/docs/rules/space-unary-ops
        "switch-colon-spacing": "warn", // Spaces after case colon

        // Deviation from < https://eslint.org/docs/rules/#ecmascript-6 >
        "arrow-spacing": "warn", // Spaces required around fat-arrow function's "=>"
        "no-confusing-arrow": "warn", // Don't use arrows functions in conditions
        "no-var": "warn", // Use let/const instead of var

        // Other deviations
        "no-unused-vars": "off",
        "prefer-template": "warn", // Use template strings instead of + concat
        "template-curly-spacing": ["warn", "never"],
        "no-useless-concat": "error", // no concat'ing literal strings
        "no-empty": ["error", { allowEmptyCatch: true }],
        "no-debugger": "warn",
        "no-extra-boolean-cast": "off",
        "no-warning-comments": [
            "warn",
            { terms: ["todo", "to do", "fix", "fixme", "fix me", "need"], location: "start" }
        ], // warn about todo comments

        // typescript
        "@typescript-eslint/no-unused-vars": "warn",
        "@typescript-eslint/no-var-requires": "off",
        "@typescript-eslint/no-empty-function": "off",
        "@typescript-eslint/no-this-alias": "off",
        "@typescript-eslint/ban-ts-comment": "off",
        "@typescript-eslint/indent": ["warn", 4],
        "@typescript-eslint/ban-types": "warn"
    }
};