.eslintrc.json

{
    "env": {
        "es6": true,
        "browser": true,
        "mocha": true,
        "worker": true
    },
    "parserOptions": {
        "ecmaVersion": 2018,
        "ecmaFeatures": {
            "jsx": true
        }
    },
    "plugins": [
        "compat",
        "es",
        "no-unsanitized",
        "optimize-regex",
        "sonarjs",
        "unicorn"
    ],
    "extends": [
        "eslint:recommended",
        "plugin:es/restrict-to-es2018",
        "plugin:no-unsanitized/DOM",
        "plugin:sonarjs/recommended"
    ],
    "rules": {
        "array-callback-return": 2,
        "block-scoped-var": 2,
        "brace-style": [2, "stroustrup"],
        "comma-style": [2, "last"],
        "complexity": [2, 23],
        "consistent-this": [2, "self"],
        "consistent-return": 0,
        "curly": [2, "all"],
        "default-param-last": 2,
        "dot-notation": 2,
        "eol-last": 2,
        "eqeqeq": [2, "smart"],
        "for-direction": 2,
        "func-call-spacing": [2, "never"],
        "guard-for-in": 1,
        "id-length": [2, {"min": 1, "max": 29}],
        "keyword-spacing": [2, {}],
        "linebreak-style": 2,
        "max-classes-per-file": [1, 4],
        "max-depth": [2, 5],
        "max-len": [2, 120],
        "max-params": [2, 7],
        "no-alert": 2,
        "no-caller": 2,
        "no-console": 0,
        "no-constant-condition": [2, { "checkLoops": false }],
        "no-constructor-return": 2,
        "no-dupe-else-if": 2,
        "no-else-return": 2,
        "no-empty-function": [2, { "allow": ["constructors"] }],
        "no-eq-null": 2,
        "no-eval": 2,
        "no-extend-native": 2,
        "no-extra-bind": 2,
        "no-extra-parens": [1, "all", {"conditionalAssign": false}],
        "no-floating-decimal": 2,
        "no-global-assign": 2,
        "no-implicit-coercion": [2, { "allow": ["!!", "+"] } ],
        "no-implied-eval": 2,
        "no-import-assign": 2,
        "no-invalid-this": 0,
        "no-irregular-whitespace": 2,
        "no-lone-blocks": 2,
        "no-lonely-if": 2,
        "no-loop-func": 2,
        "no-loss-of-precision": 1,
        "no-mixed-spaces-and-tabs": 2,
        "no-multi-str": 2,
        "no-negated-condition": 2,
        "no-new": 2,
        "no-new-func": 2,
        "no-new-wrappers": 2,
        "no-prototype-builtins": 0,
        "no-restricted-properties": [2, {"property": "innerHTML"}, {"property": "outerHTML"}],
        "no-return-assign": 2,
        "no-return-await": 2,
        "no-script-url": 2,
        "no-self-compare": 2,
        "no-sequences": 2,
        "no-setter-return": 2,
        "no-shadow-restricted-names": 2,
        "no-trailing-spaces": 2,
        "no-throw-literal": 2,
        "no-undef": 0,
        "no-undef-init": 2,
        "no-unmodified-loop-condition": 2,
        "no-unneeded-ternary": 2,
        "no-unused-expressions": 2,
        "no-unused-vars": [2, {"vars": "local", "args": "after-used"}],
        "no-useless-call": 2,
        "no-useless-computed-key": [2, { "enforceForClassMembers": true }],
        "no-useless-concat": 2,
        "no-useless-constructor": 2,
        "no-useless-return": 2,
        "no-use-before-define": [2, {"functions": false}],
        "no-void": 2,
        "no-with": 2,
        "no-whitespace-before-property": 2,
        "one-var": [2, {"initialized": "never"}],
        "operator-assignment": 2,
        "prefer-arrow-callback": [2, { "allowNamedFunctions": true }],
        "prefer-const": [2, {"destructuring": "all"}],
        "prefer-destructuring": [1, {"object": true, "array": false}],
        "prefer-numeric-literals": 2,
        "prefer-regex-literals": 1,
        "prefer-rest-params": 1,
        "prefer-spread": 1,
        "prefer-template": 1,
        "rest-spread-spacing": 2,
        "semi": [2, "always"],
        "space-before-function-paren": [2, "never"],
        "space-in-parens": [2, "never"],
        "space-infix-ops": 2,
        "space-unary-ops": [2, {"words": false, "nonwords": false}],
        "spaced-comment": [2, "always"],
        "strict": [2, "function"],
        "switch-colon-spacing": 2,
        "unicode-bom": 2,
        "valid-jsdoc": 1,
        "wrap-iife": [2, "inside", {"functionPrototypeMethods": true}],
        "yoda": [2, "never"],

        "indent": [2, 4, {
            "SwitchCase": 1,
            "outerIIFEBody": "off",
            "FunctionDeclaration": {"parameters": "first"},
            "FunctionExpression": {"parameters": "first"},
            "CallExpression": {"arguments": "first"},
            "ArrayExpression": "first",
            "ObjectExpression": "first",
            "ignoredNodes": ["JSXElement"]
        }],

        // ESLint plugins configuration follows

        "compat/compat": 1,

        "es/no-atomics": 2,
        "es/no-exponential-operators": 2,
        "es/no-promise-all-settled": "off",
        "es/no-regexp-lookbehind-assertions": 2,
        "es/no-regexp-named-capture-groups": 2,
        "es/no-regexp-s-flag": 2,
        "es/no-regexp-unicode-property-escapes": 2,
        "es/no-trailing-function-commas": 2,

        "optimize-regex/optimize-regex": 2,
        "sonarjs/cognitive-complexity": [1, 48],
        "sonarjs/no-duplicate-string": [1, { "threshold": 6 }],

        "unicorn/catch-error-name": [2, {"name": "ex"}],
        "unicorn/consistent-destructuring": 1,
        "unicorn/consistent-function-scoping": 1,
        "unicorn/error-message": 2,
        "unicorn/no-abusive-eslint-disable": 2,
        "unicorn/no-instanceof-array": 2,
        "unicorn/no-this-assignment": 2,
        "unicorn/no-unsafe-regex": 2,
        "unicorn/prefer-date-now": 2,
        "unicorn/prefer-default-parameters": 1,
        "unicorn/prefer-dom-node-dataset": 2,
        "unicorn/prefer-includes": 1,
        "unicorn/prefer-keyboard-event-key": 1,
        "unicorn/prefer-modern-dom-apis": 1,
        "unicorn/prefer-negative-index": 2,
        "unicorn/prefer-set-has": 1,
        "unicorn/prefer-spread": 1,
        "unicorn/prefer-starts-ends-with": 2,
        "unicorn/prefer-ternary": 1,
        "unicorn/regex-shorthand": 2
    }
}