webpack使用extract-text-webpack-plugin打包时提示错误Use Chunks.groupsIterable and filter by instanceof Entryp

转自：https://blog.csdn.net/gezilan/article/details/80020417

前提条件： 
当前时间是2018年4月20日。 
webpack的最新版本为是 v4.6.0 
extract-text-webpack-plugin 当前通过install默认安装到的版本是v3.0.2

　　

问题描述

使用extract-text-webpack-plugin在打包是提示错误

(node:12712) DeprecationWarning: Tapable.plugin is deprecated. Use new API on `.hooks` instead
    E:\***\myproject\webpack-vue-elementUi\node_modules\webpack\lib\Chunk.js:460
                    throw new Error(
                    ^

    Error: Chunk.entrypoints: Use Chunks.groupsIterable and filter by instanceof Entrypoint instead
        at Chunk.get (E:\***\myproject\webpack-vue-elementUi\node_modules\webpack\lib\Chunk.js:460:9)
        at E:\***\myproject\webpack-vue-elementUi\node_modules\extract-text-webpack-plugin\dist\index.js:176:48
        at Array.forEach (<anonymous>)
        at E:\***\myproject\webpack-vue-elementUi\node_modules\extract-text-webpack-plugin\dist\index.js:171:18

　　

问题分析

看官网也有这个问题，extract-text-webpack-plugin还不能支持webpack4.0.0以上的版本。有个这样的描述 
 
既然出现这个问题了，那基本上你用的webpack版本一定是4.0.0以上的了。 
查看下package.json里

 "devDependencies": {
    "css-loader": "^0.28.11",
    "extract-text-webpack-plugin": "^3.0.2",
    "style-loader": "^0.21.0",
    "webpack": "^4.12.0",
    "webpack-cli": "^3.0.4",
    "webpack-dev-server": "^3.1.4"
  }

解决办法

npm install --save-dev extract-text-webpack-plugin@next 
会下载到+ extract-text-webpack-plugin@4.0.0-beta.0 
然后在打包就正常了

 "devDependencies": {
    "css-loader": "^0.28.11",
    "extract-text-webpack-plugin": "^4.0.0-beta.0",
    "style-loader": "^0.21.0",
    "webpack": "^4.12.0",
    "webpack-cli": "^3.0.4",
    "webpack-dev-server": "^3.1.4"
  }

　　然后就可以正常运行了。