"babel-eslint": "^7.2.3",
"eslint": "^4.19",
"eslint-loader": "^1.8.0",
"eslint-plugin-react": "^7.1.0"

{
  "devDependencies": {
    "@babel/cli": "^7.2.3",
    "@babel/core": "^7.1.0",
    "@babel/plugin-proposal-object-rest-spread": "^7.2.0",
    "@babel/polyfill": "^7.2.5",
    "@babel/preset-env": "^7.1.0",
    "@babel/preset-react": "^7.0.0",
    "babel-core": "7.0.0-bridge.0",
    "babel-eslint": "^10.0.1",
    "babel-jest": "^21.2.0",
    "babel-loader": "^8.0.2",
    "enzyme": "^3.8.0",
    "eslint": "^5.12.0",
    "eslint-loader": "^2.1.1",
    "eslint-plugin-react": "^7.12.4",
    "extract-text-webpack-plugin": "^4.0.0-beta.0",
    "jest": "^21.2.1",
    "mini-css-extract-plugin": "^0.5.0",
    "react-sortable-hoc": "^1.4.0",
    "react-test-renderer": "^16.7.0",
    "sinon": "^7.2.2",
    "webpack": "^4.28.4",
    "webpack-cli": "^3.2.1",
    "webpack-dev-server": "^3.1.14",
    "webpack-node-externals": "^1.7.2"
  },
  ...
  "scripts": {
    ...
    "lint": "eslint 'app/**'",
  }
}

const path = require('path');
const webpack = require('webpack');
const ExtractTextPlugin = require('extract-text-webpack-plugin');


module.exports = env =>
{
    const developMode = (env && env.dev);
    const watch = developMode;

    return {
        mode: (developMode ? 'development' : 'production'),
        context: path.resolve(__dirname, './app'),
        module: {
            rules: [
                {
                    test: /.m?js$/,
                    exclude: /node_modules/,
                    use: {
                        loader: 'babel-loader',
                        options: {
                            plugins: [
                                '@babel/plugin-proposal-object-rest-spread'
                            ],
                            presets: [
                                '@babel/preset-env',
                                '@babel/preset-react'
                            ]
                        }
                    }
                },
                {
                    test: /.jsx?$/,
                    use: [
                        {
                            loader: 'eslint-loader'
                        }
                    ],
                    exclude: /node_modules/
                },
                {
                    test: /.scss$/,
                    include: /.scss$/,
                    loaders: ExtractTextPlugin.extract({
                        fallback: 'style-loader',
                        use: 'css-loader!sass-loader',
                    }),
                },
                {
                    test: /.css$/,
                    exclude: /.scss$/,
                    use: ['style-loader', 'css-loader']
                },
            ]
        },
        entry: {
            'js/app.file1.js': './exports/file1.js',
            'js/app.file2.js': './exports/file2.js',
            'css/app.file1.css': './styles/file1.scss',
            'css/app.file2.css': './styles/file2.scss'
        },
        output: {
            path: path.resolve(__dirname, './assets'),
            filename: '[name]'
        },
        performance: {
            hints: false,
        },
        resolve: {
            modules: [
                path.resolve('./app'),
                'node_modules'
            ]
        },
        plugins: [
            new ExtractTextPlugin({
                filename: '[name]'
            })
        ],
        watch: watch
    };
};

{
  "extends": [
    "eslint:recommended",
    "plugin:react/recommended"
  ],
  "env": {
    "browser": true,
    "es6": true
  },
  "globals": {
    "apiRequest": true,
    "$": true,
    "launchModal": true,
    "Promise": true,
    "toastr": true,
    "localStorage": true
  },
  "parser": "babel-eslint",
  "plugins": [
    "react"
  ],
  "parserOptions": {
    "ecmaFeatures": {
      "jsx": true
    },
    "ecmaVersion": 2018,
    "sourceType": "module"
  },
  "rules": {
    "camelcase": [
      "error",
      {
        "properties": "never"
      }
    ],
    "curly": "error",
    "for-direction": "error",
    "global-require": "error",
    "indent": [
      "error",
      4,
      {
        "SwitchCase": 1,
        "ignoredNodes": [
          "JSXAttribute",
          "JSXSpreadAttribute"
        ]
      }
    ],
    "key-spacing": [
      "error",
      {
        "beforeColon": false,
        "afterColon": true,
        "mode": "strict"
      }
    ],
    "no-case-declarations": "off",
    "no-confusing-arrow": [
      "error",
      {
        "allowParens": false
      }
    ],
    "no-multi-spaces": "error",
    "no-trailing-spaces": "error",
    "no-unused-expressions": "error",
    "no-var": "error",
    "no-whitespace-before-property": "error",
    "padding-line-between-statements": [
      "error",
      {
        "blankLine": "always",
        "prev": "*",
        "next": [
          "block-like",
          "function",
          "multiline-block-like",
          "return"
        ]
      }
    ],
    "quotes": [
      "error",
      "single"
    ],
    "react/class-methods-use-this": "off",
    "react/jsx-filename-extension": "off",
    "react/jsx-no-bind": "off",
    "react/jsx-sort-props": [
      "error",
      {
        "shorthandFirst": true,
        "callbacksLast": true
      }
    ],
    "react/jsx-uses-react": "error",
    "react/jsx-uses-vars": "error",
    "react/jsx-wrap-multilines": "off",
    "react/prefer-stateless-function": "off",
    "react/prop-types": "off",
    "react/react-in-jsx-scope": "off",
    "react/require-default-props": "off",
    "react/sort-comp": "error",
    "semi": [
      "error",
      "always"
    ],
    "sort-imports": [
      "error",
      {
        "ignoreCase": true
      }
    ],
    "space-before-blocks": [
      "error",
      "always"
    ]
  },
  "settings": {
    "react": {
      "version": "detect"
    }
  }
}