init webpack4

.babelrc

{
    "presets": [
        ["env", {
            "modules": false,
            "targets": {
                "browsers": [
                    "last 2 versions",
                    "Explorer >= 8"
                ]
            }
        }]
    ]
}

.eslintrc

{
    "extends": "airbnb-base",
    "globals": {
        "window": true,
        "document": true
    }
}

packeage.json

{
  "name": "name",
  "version": "1.0.0",
  "main": "index.js",
  "scripts": {
    "develop": "npx webpack --module-bind 'js=babel-loader' --module-bind 'html=html-loader' --entry ./src --output ../bundle.js --mode development",
    "production": "npx webpack --module-bind 'js=babel-loader' --module-bind 'html=html-loader' --entry ./src/ --output ../bundle.js --mode production",
    "eslint": "npx eslint ./src --fix"
  },
  "devDependencies": {
    "babel-core": "^6.26.0",
    "babel-loader": "^7.1.4",
    "babel-preset-env": "^1.6.1",
    "eslint": "^4.18.2",
    "eslint-config-airbnb-base": "^12.1.0",
    "eslint-plugin-import": "^2.9.0",
    "html-loader": "^0.5.5",
    "webpack": "^4.1.1",
    "webpack-cli": "^2.0.11"
  }
}