.eslintrc.json

{
    "root": true,
    "env": {
        "browser": false,
        "commonjs": false,
        "es6": true,
        "node": true
    },
    "installedESLint": true,
    "parserOptions": {
        "ecmaFeatures": {
            "globalReturn": false,
            "impliedStrict": true,
            "jsx": true,
            "experimentalObjectRestSpread ": true
        },
        "sourceType": "module"
    },
    "plugins": [
        "react"
    ],
    "rules": {
        /*// Possible Errors
        // --------------------
        "comma-dangle": ["error", "never"],
        "valid-jsdoc": ["error", {
            "requireReturn": false,
            "prefer": {
                "return": "returns"
            }
            }],
            // Best Practices
            // --------------------
            // Strict Mode
            // --------------------
            "strict": ["error", "safe"], // require "use strict" globally when inside a module wrapper and in function scopes everywhere else
            // Variables
            // --------------------
            "no-shadow-restricted-names": "error",
            // Node.js and CommonJS
            // --------------------
            // Stylistic Issues
            // --------------------
            "indent": ["error", 2],
            "jsx-quotes": ["error", "prefer-double"],
            "linebreak-style": ["error", "unix"],
            "quotes": ["error", "single"],
            "semi": ["error", "always"]
            // ECMAScript 6
            // --------------------*/
        }
    }