.eslintrc.json

{
    "extends":"eslint:recommended",
    "parserOptions": {
        "ecmaVersion": 8
    },
    "env": {
        "browser": true,
        "es2021": true
    },
    "ignorePatterns":["Libs/"],
    "rules": {
        "for-direction": "off",
        "no-await-in-loop": "warn",
        "no-constructor-return": "error",
        "no-duplicate-imports": "error",
        "dot-notation": "error",
        "default-param-last":"error",
        "curly": "warn",
        "consistent-this": ["warn", "that"],
        "capitalized-comments": [
            "warn",
            "always",
            {
                "ignoreConsecutiveComments": true
            }
        ],
        "no-extra-bind": "error",
        "array-bracket-newline" : [
            "warn",
            {
                "multiline": true,
                "minItems": 3
            }
        ],
        "array-bracket-spacing": ["warn", "never"],
        "array-element-newline": ["warn", "always"],
        "arrow-parens": ["warn", "as-needed"],
        "arrow-spacing": ["warn", { "before": true, "after": true }],
        "block-spacing": "warn",
        "brace-style": ["warn", "1tbs", { "allowSingleLine": true }],
        "comma-dangle": ["warn", "never"],
        "comma-spacing": ["warn", { "before": false, "after": true }],
        "comma-style": ["warn", "last"],
        "computed-property-spacing": ["warn", "never"],
        "dot-location": ["warn", "property"],
        "func-call-spacing": ["warn", "never"],
        "function-call-argument-newline": ["warn", "consistent"],
        "generator-star-spacing": ["warn", "after"],
        "implicit-arrow-linebreak": ["warn", "beside"],
        "indent": ["error", 4],
        "jsx-quotes": ["warn", "prefer-double"],
        "key-spacing": ["warn", { "beforeColon": false, "afterColon": true,"align": "colon" }],
        "keyword-spacing": ["warn", { "before": true, "after": true }],
        "linebreak-style": ["warn"],
        "lines-around-comment": ["warn", {
            "beforeBlockComment": true,
            "beforeLineComment": true,
            "allowBlockStart": true,
            "allowClassStart": true
        }],
        "lines-between-class-members": ["warn", "always", { "exceptAfterSingleLine": true }],
        "max-len": ["warn", {
            "code": 120,
            "tabWidth": 4,
            "ignoreUrls": true,
            "ignoreStrings": true,
            "comments": 140
        }],
        "max-statements-per-line": ["warn", { "max": 1 }],
        "multiline-ternary": ["warn", "never"],
        "new-parens": "warn",
        "newline-per-chained-call": ["warn", { "ignoreChainWithDepth": 2 }],
        "no-extra-parens": ["warn", "all", {
            "nestedBinaryExpressions": true,
            "enforceForArrowConditionals": true
        }],
        "no-mixed-spaces-and-tabs": "warn",
        "no-multi-spaces": "warn",
        "no-multiple-empty-lines": ["warn", { "max": 2 }],
        "no-trailing-spaces": "warn",
        "no-whitespace-before-property": "warn",
        "object-curly-newline": ["warn", { "multiline": true, "minProperties": 3 }],
        "object-curly-spacing": ["warn", "never"],
        "object-property-newline": ["warn", { "allowAllPropertiesOnSameLine": true }],
        "operator-linebreak": ["warn", "after"],
        "rest-spread-spacing": ["warn", "never"],
        "semi": ["error", "always"],
        "semi-spacing": ["warn", { "before": false, "after": false}],
        "semi-style": ["error", "last"],
        "space-before-blocks": ["warn", "always"],
        "space-before-function-paren": ["warn", "never"],
        "space-in-parens": ["warn", "never"],
        "space-infix-ops": "warn",
        "space-unary-ops": ["warn", { "words": true, "nonwords": false }],
        "switch-colon-spacing": "warn",
        "template-curly-spacing": ["warn", "never"],
        "template-tag-spacing": ["warn", "always"],
        "wrap-iife": ["warn", "inside"],
        "yield-star-spacing": ["warn", "after"]
    },
    "overrides": [
        {
            "files": ["Web/**/*"],
            "env": {
                "jquery": true
            }
        },
        {
            // Override for the folders which contains script runned with nodejs. 
            "files": ["Server/**/*","Scripts/**/*"],
            "parserOptions": {
                "ecmaVersion": 11
            },
            "env": {
                "node": true
            }
        },
        {
            "files": ["*.html"],
            "plugins": ["@html-eslint"],
            "parser": "@html-eslint/parser",
            "rules": {
                "@html-eslint/require-doctype": "warn",
                "@html-eslint/no-duplicate-id": "error",
                "@html-eslint/require-li-container": "error",
                "@html-eslint/no-obsolete-tags": "error",
                "@html-eslint/require-closing-tags": "warn",
                "@html-eslint/no-duplicate-attrs": "error",
                "@html-eslint/require-title": "error",
                "@html-eslint/no-multiple-h1": "error",
                "@html-eslint/require-img-alt": "error",
                "@html-eslint/no-extra-spacing-attrs": "warn",
                "@html-eslint/indent": "warn",
                "@html-eslint/quotes": ["warn","double"],
                "@html-eslint/no-multiple-empty-lines": "warn",
                "capitalized-comments": "off"
            }
        }
    ]
}