.eslintrc.json

{
    "env": {
        "browser": true,
        "webextensions": true
    },
    "extends": [
        "plugin:import/recommended",
        "plugin:import/react",
        "plugin:promise/recommended",
        "plugin:react/recommended",
        "standard",
        "standard-react"
    ],
    "settings": {
        "import/resolver": {
            "node": {
                "extensions": [
                    ".js",
                    ".jsx"
                ],
                "moduleDirectory": [
                    "node_modules",
                    "."
                ]
            }
        }
    },
    "plugins": [
        "standard",
        "import",
        "promise",
        "react"
    ],
    "parserOptions": {
    	"sourceType": "module",
	    "ecmaFeatures": {
	        "jsx": true
	    }
  	},
    "rules":{
    	"comma-dangle": ["error", "always-multiline"],
        "indent": ["error", 4, { "SwitchCase": 1 }],
        "react/jsx-indent": ["error", 4],
        "react/jsx-indent-props": ["error", 4],
        "no-multiple-empty-lines": ["error", { "max": 2, "maxEOF": 0 }],
        "no-unused-vars": "warn",
        "space-before-function-paren": "off",
        "operator-linebreak": ["error", "before"],
        "handle-callback-err": "off",
        "import/no-mutable-exports": "error",
        "import/unambiguous": "off",
        "promise/avoid-new": "off",
        "react/jsx-filename-extension": "error",
        "react/prefer-stateless-function": "warn",
        "react/sort-comp": "warn",
        "react/jsx-max-props-per-line": [1, { "when": "multiline" }]
    }
}