执行npm install less less-loader --save-dev命令，报错如下：
npm ERR! code ERESOLVE npm ERR! ERESOLVE unable to resolve dependency tree npm ERR! npm ERR! While resolving: [email protected] npm ERR! Found: [email protected] npm ERR! node_modules/webpack npm ERR! dev webpack@"^3.6.0" from the root project npm ERR! npm ERR! Could not resolve dependency: npm ERR! peer webpack@"^5.0.0" from [email protected] npm ERR! node_modules/less-loader npm ERR! less-loader@"*" 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\xxxxxx\AppData\Local\npm-cache\eresolve-report.txt for a full report. npm ERR! npm ERR! A complete log of this run can be found in: npm ERR! C:\Users\xxxxxx\AppData\Local\npm-cache\_logs\2021-03-01T12_00_00_216Z-debug.log
原因
less本版太高需要降低版本
方法
先移除之前版本：npm uninstall less-loader
下载指定版本：npm install [email protected] -D
* 若还是报错可移除文件node_modules，重新下载cnpm install
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