Webpack傻瓜式指南（一）安装babel-loader、babel-preset-es2015报错

[lcoder]

还需要安装一个babel-core模块，不然会报如下的错误：

ERROR in ./app/index.js
Module build failed: Error: Cannot find module 'babel-core'
    at Function.Module._resolveFilename (module.js:469:15)
    at Function.Module._load (module.js:417:25)
    at Module.require (module.js:497:17)
    at require (internal/module.js:20:19)
    at Object.<anonymous> (/Users/uesrHome/demo/webpack/node_modules/babel-loader/lib/index.js:4:13)

博客中忘记写安装babel-core模块了。