参考：https://my.oschina.net/hengbao666/blog/5035887
问题描述
npm ERR! code ERESOLVE
npm ERR! ERESOLVE unable to resolve dependency tree
npm ERR!
npm ERR! While resolving: XXX@3.4.0
npm ERR! Found: webpack@5.31.2
npm ERR! node_modules/webpack
npm ERR! peer webpack@"^4.0.0 || ^5.0.0" from html-webpack-plugin@4.5.2
npm ERR! node_modules/html-webpack-plugin
npm ERR! peer html-webpack-plugin@"^3.0.0 || ^4.0.0" from script-ext-html-webpack-plugin@2.1.5
npm ERR! node_modules/script-ext-html-webpack-plugin
npm ERR! dev script-ext-html-webpack-plugin@"2.1.5" from the root project
npm ERR!
npm ERR! Could not resolve dependency:
npm ERR! peer webpack@"^1.0.0 || ^2.0.0 || ^3.0.0 || ^4.0.0" from script-ext-html-webpack-plugin@2.1.5
npm ERR! node_modules/script-ext-html-webpack-plugin
npm ERR! dev script-ext-html-webpack-plugin@"2.1.5" 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 F:\Program Files\nodejs\node_cache\eresolve-report.txt for a full report.
npm ERR! A complete log of this run can be found in:
npm ERR! F:\Program Files\nodejs\node_cache\_logs\2021-04-10T05_40_57_043Z-debug.log
问题分析：npm 版本太高了。
问题解决：
npm install npm@6.14.10 -g
