.eslintrc

{   
    "extends": [
        "eslint:recommended"
    ],

    "env": {
        "node": true,
        "es6": true,
        "jest": true
    },

    "globals": {
        "request": false,
        "agent": false
    },

    "parserOptions": {
        "ecmaVersion": 2020,
        "sourceType": "module"
    },

    "rules": {
        "no-misleading-character-class": "error",
        "no-template-curly-in-string": "error",
        "no-console": ["warn", { "allow": ["warn", "error", "info"] }],
        "linebreak-style": ["error", "unix"],

        // Best practices
        "array-callback-return": "error",
        "consistent-return": "error",
        "default-case": "error",
        "eqeqeq": "error",
        "no-eq-null": "error",
        "no-param-reassign": "error",
        "no-return-assign": "error",
        "no-return-await": "error",
        "no-unused-expressions": "error",
        "require-await": "error",
        "radix": "error",

        // Variables
        "no-unused-vars": ["error", { "argsIgnorePattern": "^_" }],
        "no-shadow-restricted-names": "error",

        // Style
        "array-bracket-spacing": "error",
        "block-spacing": ["error", "always"],
        "comma-dangle": ["error", {
            "arrays": "only-multiline",
            "objects": "only-multiline",
            "imports": "only-multiline",
            "exports": "only-multiline",
            "functions": "never"
        }],
        "comma-spacing": ["error", { "before": false, "after": true }],
        "comma-style": ["error", "last"],
        "computed-property-spacing": ["error", "never"],
        "eol-last": ["error", "always"],
        "indent": ["error", 4, { "SwitchCase": 1 }],
        "jsx-quotes": ["error", "prefer-double"],
        "key-spacing": ["error", { "beforeColon": false, "afterColon": true }],
        "keyword-spacing": "error",
        "max-len": ["error", { "code": 140 }], // Being lenient here
        "new-parens": "error",
        "no-mixed-operators": "error",
        "no-multiple-empty-lines": ["error", { "max": 2, "maxEOF": 0 }],
        "no-nested-ternary": "error",
        "no-trailing-spaces": "error",
        "no-tabs": "error",
        "object-curly-spacing": ["error", "always"],
        "prefer-object-spread": "error",
        "quotes": ["error", "double", { "avoidEscape": true }],
        "semi": ["error", "always", { "omitLastInOneLineBlock": true }],
        "semi-spacing": ["error", { "before": false, "after": true }],
        "space-before-blocks": ["error", "always"],
        "space-before-function-paren": ["error", {
            "anonymous": "never",
            "named": "never",
            "asyncArrow": "always",
        }],
        "space-in-parens": "error",
        "space-infix-ops": "error",
        "space-unary-ops": ["error", {
            "words": true,
            "nonwords": false,
        }],
        "spaced-comment": ["error", "always", { "exceptions": ["-"] }],
        "switch-colon-spacing": ["error", {
            "after": true,
            "before": false,
        }],
        "brace-style": ["error", "1tbs"],

        // ES6
        "arrow-spacing": "error",
        "arrow-body-style": ["error", "as-needed"],
        "arrow-parens": ["error", "always"],
        "no-duplicate-imports": "error",
        "no-var": "error",
        "prefer-const": ["error", { "destructuring": "all" }],
        "prefer-template": "error",
        "template-curly-spacing": "error",
    }
}