node项目运行报错

Cannot find module 'webpack/bin/config-optimist'

在项目里面运行npm i webpack-dev-server

Cannot find module 'webpack/bin/config-yargs'

在项目里面运行npm i webpack

 Cannot read property 'thisCompilation' of undefined

先卸载执行 npm uninstall --save-dev extract-text-webpack-plugin

再安装 npm install --save-dev extract-text-webpack-plugin