问题
One CLI for webpack must be installed. These are recommended choices, delivered as separate packages:
- webpack-cli (https://github.com/webpack/webpack-cli)
The original webpack full-featured CLI.
We will use "npm" to install the CLI via "npm install -D".
Do you want to install 'webpack-cli' (yes/no):
原因
这个错误一般出现在启动 webpack 打包项目的时候，这是因为缺少了 webpack-cli 模块，使用 webpack 命令时没有找到 webpack-cli。
解决
只需要安装将 webpack-cli 安装到全局和项目中
npm install webpack-cli -g // 全局安装
npm install webpack-cli --save-dev // 在项目中安装
