Webpack Laravel Mix-JS as ES2016

默认情况下（用于生产），Laravel Mix将JS转换为ES5。我希望能够管理它，并在需要时关闭它。这是我的档案：

webpack.mix.js:

let mix = require('laravel-mix');

mix.disableNotifications();
mix.setPublicPath('./');

mix.js([
  '_dev/js/Core.js'
], 'public/dist/js/scripts.js');

class Core {

  constructor()
  {
    console.log('Hello World!');
  }

}

new Core();

{
  "private": true,
  "scripts": {
    "dev": "npm run development",
    "development": "cross-env NODE_ENV=development node_modules/webpack/bin/webpack.js --progress --hide-modules --config=node_modules/laravel-mix/setup/webpack.config.js",
    "watch": "cross-env NODE_ENV=development node_modules/webpack/bin/webpack.js --watch --progress --hide-modules --config=node_modules/laravel-mix/setup/webpack.config.js",
    "prod": "npm run production",
    "production": "cross-env NODE_ENV=production node_modules/webpack/bin/webpack.js --progress --hide-modules --config=node_modules/laravel-mix/setup/webpack.config.js"
  },
  "browserslist": [
    "chrome 60",
    "firefox 55",
    "safari 11"
  ],
  "devDependencies": {
    "cross-env": "^5.2.0",
    "laravel-mix": "^1.0"
  }
}

\u dev/js/Core.js:

let mix = require('laravel-mix');

mix.disableNotifications();
mix.setPublicPath('./');

mix.js([
  '_dev/js/Core.js'
], 'public/dist/js/scripts.js');

class Core {

  constructor()
  {
    console.log('Hello World!');
  }

}

new Core();

{
  "private": true,
  "scripts": {
    "dev": "npm run development",
    "development": "cross-env NODE_ENV=development node_modules/webpack/bin/webpack.js --progress --hide-modules --config=node_modules/laravel-mix/setup/webpack.config.js",
    "watch": "cross-env NODE_ENV=development node_modules/webpack/bin/webpack.js --watch --progress --hide-modules --config=node_modules/laravel-mix/setup/webpack.config.js",
    "prod": "npm run production",
    "production": "cross-env NODE_ENV=production node_modules/webpack/bin/webpack.js --progress --hide-modules --config=node_modules/laravel-mix/setup/webpack.config.js"
  },
  "browserslist": [
    "chrome 60",
    "firefox 55",
    "safari 11"
  ],
  "devDependencies": {
    "cross-env": "^5.2.0",
    "laravel-mix": "^1.0"
  }
}

package.json:

let mix = require('laravel-mix');

mix.disableNotifications();
mix.setPublicPath('./');

mix.js([
  '_dev/js/Core.js'
], 'public/dist/js/scripts.js');

class Core {

  constructor()
  {
    console.log('Hello World!');
  }

}

new Core();

{
  "private": true,
  "scripts": {
    "dev": "npm run development",
    "development": "cross-env NODE_ENV=development node_modules/webpack/bin/webpack.js --progress --hide-modules --config=node_modules/laravel-mix/setup/webpack.config.js",
    "watch": "cross-env NODE_ENV=development node_modules/webpack/bin/webpack.js --watch --progress --hide-modules --config=node_modules/laravel-mix/setup/webpack.config.js",
    "prod": "npm run production",
    "production": "cross-env NODE_ENV=production node_modules/webpack/bin/webpack.js --progress --hide-modules --config=node_modules/laravel-mix/setup/webpack.config.js"
  },
  "browserslist": [
    "chrome 60",
    "firefox 55",
    "safari 11"
  ],
  "devDependencies": {
    "cross-env": "^5.2.0",
    "laravel-mix": "^1.0"
  }
}

我可以用某种方式更改预设吗？理想情况下，巴贝尔会考虑浏览器列表，并基于它们转换JS。例如，如果我有IE11，就有ES2015，如果不是ES2016

Laravel Mix的AutoRefixer支持浏览器列表，效果极佳

提前感谢您的帮助