【npm错误】- npm ERR code ERESOLVE 和 npm ERR ERESOLVE could not resolve 问题

npm ERR! code ERESOLVE
npm ERR! ERESOLVE could not resolve
npm ERR!
npm ERR! While resolving: shopcar-demo@0.1.0
npm ERR! Found: webpack@5.72.0
npm ERR! node_modules/webpack
npm ERR!   peer webpack@"^4.0.0 || ^5.0.0" from @soda/friendly-errors-webpack-plugin@1.8.1
npm ERR!   node_modules/@soda/friendly-errors-webpack-plugin
npm ERR!     @soda/friendly-errors-webpack-plugin@"^1.8.0" from @vue/cli-service@5.0.4
npm ERR!     node_modules/@vue/cli-service
npm ERR!       peer @vue/cli-service@"^3.0.0 || ^4.0.0 || ^5.0.0-0" from @vue/cli-plugin-babel@5.0.4
npm ERR!       node_modules/@vue/cli-plugin-babel
npm ERR!         dev @vue/cli-plugin-babel@"~5.0.0" from the root project
npm ERR!       4 more (@vue/cli-plugin-eslint, @vue/cli-plugin-router, ...)
npm ERR!   webpack@"^5.54.0" from @vue/cli-plugin-babel@5.0.4
npm ERR!   node_modules/@vue/cli-plugin-babel
npm ERR!     dev @vue/cli-plugin-babel@"~5.0.0" from the root project
npm ERR!   17 more (@vue/cli-plugin-eslint, @vue/cli-service, ...)
npm ERR!
npm ERR! Could not resolve dependency:
npm ERR! less-loader@"5.0.0" from the root project
npm ERR!
npm ERR! Conflicting peer dependency: webpack@4.46.0
npm ERR! node_modules/webpack
npm ERR!   peer webpack@"^2.0.0 || ^3.0.0 || ^4.0.0" from less-loader@5.0.0
npm ERR!   node_modules/less-loader
npm ERR!     less-loader@"5.0.0" from the root project
npm ERR!
npm ERR! Fix the upstream dependency conflict, or retry
npm ERR! this command with --force, or --legacy-peer-deps
npm ERR! to accept an incorrect (and potentially broken) dependency resolution.
npm ERR! 
npm ERR! See C:\Users\admin\AppData\Local\npm-cache\eresolve-report.txt for a full report.

npm ERR! A complete log of this run can be found in:
npm ERR!     C:\Users\admin\AppData\Local\npm-cache\_logs\2022-05-07T09_45_32_750Z-debug-0.log

这里小编在 npm i less less-loader@5.0.0 -D 或者其他依赖包的时候出现以上错误

可能是npm版本问题报错

解决方法：在命令后面加上

--legacy-peer-deps

--legacy-peer-deps的作用

在NPM v7中，现在默认安装peerDependencies。

在很多情况下，这会导致版本冲突，从而中断安装过程。

--legacy-peer-deps标志是在v7中引入的，目的是绕过peerDependency自动安装；它告诉 NPM 忽略项目中引入的各个modules之间的相同modules但不同版本的问题并继续安装，保证各个引入的依赖之间对自身所使用的不同版本modules共存。