.eslintrc.json

{
    "env": {
        "browser": true,
        "es2018": true
    },
    "extends": "eslint:recommended",
    "parserOptions": {
        "sourceType": "module"
    },
    "rules": {
        "array-bracket-spacing": [ "error", "always" ],
        "arrow-spacing": "error",
        "block-spacing": [ "error", "always" ],
        "brace-style": [ "error", "stroustrup", { "allowSingleLine": true } ],
        "comma-dangle": [
            "error", {
                "arrays": "always-multiline",
                "objects": "always-multiline",
                "functions": "only-multiline"
            } ],
        "comma-spacing": [ "error", { "before": false, "after": true } ],
        "curly": "error",
        "dot-location": [ "error", "property" ],
        "eol-last": [ "error", "always" ],
        "eqeqeq": [ "error", "always" ],
        "func-call-spacing": "error",
        "indent": [ "error", 2, { "SwitchCase": 1, "flatTernaryExpressions": true } ],
        "key-spacing": [ "error", { "mode": "minimum" } ],
        "keyword-spacing": [ "error", { "before": true, "after": true } ],
        "max-depth": [ "error", { "max": 4 } ],
        "max-lines": [ "error", { "max": 500, "skipBlankLines": true, "skipComments": true } ],
        "max-lines-per-function": [ "error", { "max": 200 } ],
        "max-nested-callbacks": [ "error", { "max": 3 } ],
        "max-statements": [ "error", { "max": 40 } ],
        "max-statements-per-line": [ "error", { "max": 1 } ],
        "new-parens": "error",
        "newline-per-chained-call": [ "error", { "ignoreChainWithDepth": 2 } ],
        "no-console": "error",
        "no-else-return": [ "error", { "allowElseIf": false } ],
        "no-extra-parens": [ "error", "all", { "conditionalAssign": false } ],
        "no-lonely-if": "error",
        "no-multiple-empty-lines": [ "error", { "max": 1 } ],
        "no-negated-condition": "error",
        "no-nested-ternary": "error",
        "no-prototype-builtins": "off",
        "no-sequences": "error",
        "no-throw-literal": "error",
        "no-trailing-spaces": "error",
        "no-unneeded-ternary": "error",
        "no-useless-computed-key": "error",
        "object-curly-spacing": [ "error", "always" ],
        "object-shorthand": [ "error", "always", { "avoidQuotes": true, "avoidExplicitReturnArrows": true } ],
        "one-var": [ "error", { "initialized": "never" } ],
        "operator-linebreak": [ "error", "after" ],
        "padded-blocks": [ "error", "never" ],
        "padding-line-between-statements": [
            "error",
            { "blankLine": "always", "prev": "*",          "next": "block-like" },
            { "blankLine": "always", "prev": "block-like", "next": "*" },
            { "blankLine": "always", "prev": [ "const", "let", "var" ], "next": "*"},
            { "blankLine": "any",    "prev": [ "const", "let", "var" ], "next": [ "const", "let", "var" ] }
        ],
        "quote-props": [ "error", "as-needed" ],
        "quotes": [ "error", "single" ],
        "semi": [ "error", "always" ],
        "semi-spacing": [ "error", { "before": false, "after": true } ],
        "space-before-blocks": [ "error", "always" ],
        "space-before-function-paren": [ "error", "never" ],
        "space-in-parens": [ "error", "never" ],
        "space-infix-ops": "error",
        "space-unary-ops": "error",
        "spaced-comment": [ "error", "always" ],
        "switch-colon-spacing": "error",
        "unicode-bom": "error",
        "yoda": [ "error", "never", { "exceptRange": true } ]
    }
}