错误日志：
1 \AppData\Roaming\npm\node_modules\webpack-cli\bin\cli.js:244 2 ????????????????????????????????throw err; 3 ????????????????????????????????^ 4 ?5 Error: Cannot find module ‘webpack/lib/RequestShortener‘ 6 ????at Function.Module._resolveFilename (internal/modules/cjs/loader.js:571:15) 7 ????at Function.Module._load (internal/modules/cjs/loader.js:497:25) 8 ????at Module.require (internal/modules/cjs/loader.js:626:17) 9 ????at require (C:\Users\Administrator\AppData\Roaming\npm\node_modules\webpack-cli\node_modules\v8-compile-cache\v8-compile-cache.js:159:20)10 ????at Object.<anonymous> (D:\MyDisk\my-project\webpack\node_modules\uglifyjs-webpack-plugin\dist\index.js:19:25)
解决办法：
npm install webpack --save-dev
再次报错：
1 $ npm install webpack2 npm ERR! code ENOSELF3 npm ERR! Refusing to install package with name "webpack" under a package4 npm ERR! also called "webpack". Did you name your project the same5 npm ERR! as the dependency you‘re installing?6 npm ERR!7 npm ERR! For more information, see:8 npm ERR! ????<https://docs.npmjs.com/cli/install#limitations-of-npms-install-algorithm>
原因是 package.json 文件中的 name 为 webpack，所以避免项目名称与插件名称重复
webpack dev 日记
原文地址：https://www.cnblogs.com/landmass/p/9670158.html