【CommonsChunkPlugin】
The CommonsChunkPlugin is an opt-in feature that creates a separate file (known as a chunk), consisting of common modules shared between multiple entry points.
1、name: string, or names: string[]
The chunk name of the commons chunk.
参考：
1、https://webpack.js.org/plugins/commons-chunk-plugin/#move-common-modules-into-the-parent-chunk
原文：http://www.cnblogs.com/tekkaman/p/6645283.html