.eslintrc.json

{
    "env": {
        "browser": true,
        "es6": true,
        "jest": true
    },
    "extends": [
        "eslint:recommended",
        "plugin:react/recommended",
        "plugin:flowtype/recommended"
    ],
    "parser": "babel-eslint",
    "parserOptions": {
        "ecmaFeatures": {
            "experimentalObjectRestSpread": true,
            "jsx": true
        },
        "sourceType": "module"
    },
    "plugins": [
        "react",
        "flowtype",
        "class-property"
    ],
    "rules": {
        "indent": [
            "error",
            4
        ],
        "linebreak-style": [
            "error",
            "unix"
        ],
        "max-len": [
            "error",
            120
        ],
        "quotes": [
            "error",
            "single"
        ],
        "semi": [
            "error",
            "always"
        ],
        "comma-dangle": [
            "error",
            "always-multiline"
        ],
        "no-alert": "error",
        "react/jsx-curly-spacing": [
            "error",
            "never"
        ],
        "react/jsx-closing-bracket-location": [
            "error",
            "after-props"
        ],
        "react/jsx-wrap-multilines": "error",
        "react/jsx-pascal-case": "error",
        "react/jsx-tag-spacing": "error",
        "react/jsx-key": "error",
        "react/jsx-indent": "error",
        "react/jsx-no-bind": "error",
        "react/jsx-indent-props": "error",
        "react/jsx-equals-spacing": "error",
        "react/jsx-handler-names": "error",
        "react/jsx-first-prop-new-line": [
            "error",
            "multiline-multiprop"
        ],
        "react/prop-types": "off",
        "flowtype/require-valid-file-annotation": [
            "error",
            "always",
            {
                "annotationStyle": "line"
            }
        ],
        "flowtype/space-after-type-colon": [
            "error",
            "always"
        ],
        "flowtype/object-type-delimiter": [
            "error",
            "comma"
        ],
        "flowtype/no-dupe-keys": "error",
        "flowtype/delimiter-dangle": [
            "error",
            "always-multiline"
        ],
        "class-property/class-property-semicolon": "error"
    }
}