问题描述： 明明下载了webpack 和 webpack -cli ，但是执行webpack -v获取不到版本信息！

安装打包工具：npm install webpack -g
安装客户端：npm install webpack cli -g

测试安装是否成功
webpack -v
webpack -cli -v

明明下载了webpack 和 webpack -cli ，但是执行webpack -v获取不到版本信息：

PS E:\\mango\mango-ui> webpack -v            
CLI for webpack must be installed.
  webpack-cli (https://github.com/webpack/webpack-cli)

We will use "npm" to install the CLI via "npm install -D webpack-cli".
Do you want to install 'webpack-cli' (yes/no): 
You can also install the CLI manually.

解决办法： 依次执行 npm install -g webpack-cli 、npm fund

PS E:\mango\mango-ui> npm install -g webpack-cli
added 117 packages, and audited 118 packages in 15s

15 packages are looking for funding
  run `npm fund` for details

found 0 vulnerabilities
PS E:\mango\mango-ui> npm fund                  
mango-ui@1.0.0

PS E:\mango\mango-ui> webpack -v                
webpack: 5.74.0
webpack-cli: 4.10.0
webpack-dev-server not installed
PS E:\mango\mango-ui>