Webpack学习笔记一：What is webpack
#，Loaders干嘛的，webpack can only process JavaScript natively, but loaders are used to transform other resources into JavaScript
#，Plugin System，webpack features a rich plugin system. Most internal features are based on this plugin system
提问：
我想知道Loaders和Plugin的区别，他们各有什么不同？是否有功能上的交叉？然后怎么写一个Loader？又怎么写一个Plugin？
留待后续分解。
