vue 构建失败 --Unexpected token: punc (()

npm run build 构建失败

vue 打包出错——Unexpected token: punc (()

ERROR in static/js/vendor.01f38d9d512d1cb86953.js from UglifyJs
Unexpected token: punc (() [./node_modules/_element-ui@2.0.5@element-ui/src/mixins/migrating.js:23,0][static/js/vendor.01f38d9d512d1cb86953.js:52337,9]
 
  Build failed with errors.
 
npm ERR! code ELIFECYCLE
npm ERR! errno 1
npm ERR! battery@1.0.0 build: `node build/build.js`
npm ERR! Exit status 1
npm ERR!
npm ERR! Failed at the battery@1.0.0 build script.
npm ERR! This is probably not a problem with npm. There is likely additional logging output above.
 
npm ERR! A complete log of this run can be found in:
npm ERR!     E:\Program Files\nodejs\node_cache\_logs\2018-03-07T02_24_43_985Z-debug.log

webpack.base.conf.js

module: {
    rules: [
      {
        test: /\.vue$/,
        loader: 'vue-loader',
        options: vueLoaderConfig
      },
      {
        test: /\.js$/,
        loader: 'babel-loader',
        include: [resolve('src'), resolve('test'),resolve('/node_modules/element-ui/src'),resolve('/node_modules/element-ui/packages')]
      },

打包需要的文件在 _element-ui@2.0.5@element-ui 包中，但是_element-ui@2.0.5@element-ui 包没有在 webpack.base.conf.js 中进行配置。

解决办法：

删除 node_modules 下的 
 _element-ui@2.0.5@element-ui
element-ui

然后重新放入最新版本的的 element-ui包。

问题解决。

参考文档：http://blog.csdn.net/wild46cat/article/details/78024796