当前时间2018年5月9日12:13:11
在使用webpack4创建时，使用了extract-text-webpack-plugin插件，然而在打包时实现错误：
Error: Chunk.entrypoints: Use Chunks.groupsIterable and filter by instanceof Entrypoint instead
at Chunk.get (E:\webProject\my-site\xiangzhipeng.blog.src\node_modules\webpack\lib\Chunk.js:528:9)
at E:\webProject\my-site\xiangzhipeng.blog.src\node_modules\extract-text-webpack-plugin\dist\index.js:176:48
at Array.forEach (<anonymous>)
at E:\webProject\my-site\xiangzhipeng.blog.src\node_modules\extract-text-webpack-plugin\dist\index.js:171:18
at AsyncSeriesHook.eval [as callAsync] (eval at create (E:\webProject\my-site\xiangzhipeng.blog.src\node_modules\tapable\lib\HookCodeFactory.js:24:12), <anonymous>:7:1)
at AsyncSeriesHook.lazyCompileHook [as _callAsync] (E:\webProject\my-site\xiangzhipeng.blog.src\node_modules\tapable\lib\Hook.js:35:21)
at Compilation.seal (E:\webProject\my-site\xiangzhipeng.blog.src\node_modules\webpack\lib\Compilation.js:890:27)
at hooks.make.callAsync.err (E:\webProject\my-site\xiangzhipeng.blog.src\node_modules\webpack\lib\Compiler.js:481:17)
at _done (eval at create (E:\webProject\my-site\xiangzhipeng.blog.src\node_modules\tapable\lib\HookCodeFactory.js:24:12), <anonymous>:9:1)
at _err1 (eval at create (E:\webProject\my-site\xiangzhipeng.blog.src\node_modules\tapable\lib\HookCodeFactory.js:24:12), <anonymous>:32:22)
出现了Error: Chunk.entrypoints: Use Chunks.groupsIterable and filter by instanceof Entrypoint instead，
那么可能是你在下载extract-text-webpack-plugin插件的时候使用了默认推荐的版本。
由于extract-text-webpack-plugin的推荐版本还不支持webpack4.X，所以此时你需要删除掉原来的extract-text-webpack-plugin，并安装最新的测试版本：
npm uninstall --save-dev extract-text-webpack-plugin npm install --save-dev extract-text-webpack-plugin@next这样错误就没有啦！