webpack配置：安装了webpack和webpack-cli，但是运行webpack命令报错_

问题：安装的webpack，webpack-cli。运行webpack命令提示：

One CLI for webpack must be installed. These are recommended choices, delivered as separate packages:

• webpack-cli (https://github.com/webpack/we...
  The original webpack full-featured CLI.
• webpack-command (https://github.com/webpack-co...
  A lightweight, opinionated webpack CLI.

We will use "npm" to install the CLI via "npm install -D".
Which one do you like to install (webpack-cli/webpack-command):

处理方案：

查看是否全局安装webpack和webpack-cli

先全局安装webpack和webpack-cli
npm install webpack -g
npm install webpack-cli -g
再局部安装webpack和webpack-cli
npm install webpack --save-dev
npm install webpack-cli --save-dev