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

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 ()
        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": {
    ...
    "extract-text-webpack-plugin": "^3.0.2",
    "html-webpack-plugin": "^3.2.0",
    "postcss-loader": "^2.1.4",
    "style-loader": "^0.21.0",
    "webpack": "^4.6.0",
    ...
  },

解决办法

npm install --save-dev extract-text-webpack-plugin@next
会下载到+ [email protected]
然后在打包就正常了

"devDependencies": {
    ...
    "extract-text-webpack-plugin": "^4.0.0-beta.0",
    "html-webpack-plugin": "^3.2.0",
    "postcss-loader": "^2.1.4",
    "style-loader": "^0.21.0",
    "webpack": "^4.6.0",
     ...
  }