.eslintrc.json

{
    "root": true,
    "env": {
        "es6": true,
        "shared-node-browser": true
    },
    "extends": [
        "eslint:recommended",
        "plugin:flowtype/recommended"
    ],
    "parser": "babel-eslint",
    "rules": {
        "array-callback-return": "error",
        "arrow-body-style": ["error", "as-needed"],
        "arrow-parens": ["error", "as-needed"],
        "block-scoped-var": "error",
        "callback-return": "error",
        "class-methods-use-this": "error",
        "consistent-return": "error",
        "curly": ["error", "all"],
        "default-case": "error",
        "dot-location": ["error", "property"],
        "dot-notation": "error",
        "eqeqeq": "error",
        "handle-callback-err": "error",
        "no-alert": "error",
        "no-await-in-loop": "warn",
        "no-buffer-constructor": "error",
        "no-caller": "error",
        "no-confusing-arrow": "error",
        "no-console": "error",
        "no-div-regex": "error",
        "no-duplicate-imports": "error",
        "no-else-return": "error",
        "no-eq-null": "error",
        "no-eval": "error",
        "no-extend-native": "error",
        "no-extra-bind": "error",
        "no-extra-label": "error",
        "no-floating-decimal": "error",
        "no-implicit-coercion": "error",
        "no-implied-eval": "error",
        "no-invalid-this": "error",
        "no-iterator": "error",
        "no-label-var": "error",
        "no-labels": "error",
        "no-lone-blocks": "error",
        "no-loop-func": "error",
        "no-mixed-requires": "error",
        "no-multi-spaces": "error",
        "no-multi-str": "error",
        "no-new": "error",
        "no-new-func": "error",
        "no-new-require": "error",
        "no-new-wrappers": "error",
        "no-octal-escape": "error",
        "no-path-concat": "error",
        "no-process-exit": "off",
        "no-proto": "error",
        "no-restricted-properties": [
            "error",
            {
                "property": "substring",
                "message": "Use .slice instead of .substring."
            },
            {
                "property": "substr",
                "message": "Use .slice instead of .substr."
            }
        ],
        "no-return-assign": "error",
        "no-return-await": "error",
        "no-script-url": "error",
        "no-self-compare": "error",
        "no-sequences": "error",
        "no-shadow": "error",
        "no-template-curly-in-string": "warn",
        "no-throw-literal": "error",
        "no-undef-init": "error",
        "no-undefined": "error",
        "no-unmodified-loop-condition": "error",
        "no-unused-expressions": "error",
        "no-unused-vars": ["error", { "args": "none" }],
        "no-use-before-define": "error",
        "no-useless-call": "error",
        "no-useless-computed-key": "error",
        "no-useless-concat": "error",
        "no-useless-constructor": "error",
        "no-useless-rename": "error",
        "no-useless-return": "error",
        "no-var": "error",
        "no-void": "error",
        "no-warning-comments": "warn",
        "object-shorthand": "error",
        "prefer-arrow-callback": "error",
        "prefer-const": "error",
        "prefer-destructuring": "error",
        "prefer-numeric-literals": "error",
        "prefer-promise-reject-errors": "error",
        "prefer-rest-params": "error",
        "prefer-spread": "error",
        "require-await": "error",
        "sort-imports": "error",
        "strict": ["error", "global"],
        "symbol-description": "error",
        "wrap-iife": "error",
        "yoda": "error"
    }
}