.eslintrc.json

{
    "root": true,
    "extends": "eslint:recommended",
    "parserOptions": {
        "ecmaVersion": 2018
    },
    "env": {
        "node": true,
        "es6": true,
        "jest": true
    },
    "rules": {
        "array-bracket-spacing": [ "error", "always" ],
        "arrow-body-style": [ "error", "always" ],
        "block-scoped-var": "error",
        "brace-style": [ "error", "1tbs", { "allowSingleLine": true } ],
        "camelcase": "error",
        "comma-style": "error",
        "complexity": [ "error", 15 ],
        "consistent-return": "error",
        "consistent-this": [ "error", "that" ],
        "curly": "error",
        "default-case": "error",
        "dot-location": [ "error", "property" ],
        "eqeqeq": [ "error", "always" ],
        "indent": [ "error", 4, { "SwitchCase": 1 } ],
        "key-spacing": [ "error", { "beforeColon": false, "afterColon": true } ],
        "keyword-spacing": [ "error", { "before": true, "after": true } ],
        "linebreak-style": [ "error", "unix" ],
        "max-params": [ "error", 4 ],
        "no-alert": "error",
        "no-caller": "error",
        "no-class-assign": "error",
        "no-confusing-arrow": "error",
        "no-console": "error",
        "no-const-assign": "error",
        "no-else-return": "error",
        "no-eval": "error",
        "no-dupe-class-members": "error",
        "no-implied-eval": "error",
        "no-extend-native": "error",
        "no-extra-bind": "error",
        "no-implicit-coercion": "error",
        "no-invalid-this": "error",
        "no-lone-blocks": "error",
        "no-loop-func": "error",
        "no-multi-spaces": "error",
        "no-multiple-empty-lines": [ "error", { "max": 2 } ],
        "no-native-reassign": "error",
        "no-nested-ternary": "error",
        "no-new": "error",
        "no-param-reassign": "error",
        "no-return-assign": "error",
        "no-sequences": "error",
        "no-spaced-func": "error",
        "no-this-before-super": "error",
        "no-trailing-spaces": "error",
        "no-unexpected-multiline": "error",
        "no-useless-call": "error",
        "no-var": "error",
        "object-curly-spacing": [ "error", "always" ],
        "quotes": [ "error", "single" ],
        "semi": [ "error", "always" ],
        "semi-spacing": "error",
        "space-before-blocks": "error",
        "space-before-function-paren": [ "error", "never" ],
        "space-infix-ops": [ "error", { "int32Hint": false } ],
        "yoda": [ "error", "never", { "exceptRange": true } ]
    },
    "overrides": [
        {
            "files": [ "*.ts" ],
            "parser": "@typescript-eslint/parser"
        },
        {
            "files": [ "*.d.ts" ],
            "rules": {
                "no-unused-vars": "off"
            }
        }
    ]
}