解决版本冲突问题：Fix the upstream dependency conflict, or retry

问题：Vue项目中安装插件，出现下面报错：

npm ERR! code ERESOLVE
npm ERR! ERESOLVE could not resolve
npm ERR!
npm ERR! While resolving: less–loader@5.0.0
npm ERR! Found: less@4.1.2
npm ERR! node_modules/less
npm ERR!   dev less@”4.1.2″ from the root project
npm ERR!
npm ERR! Could not resolve dependency:
npm ERR! peer less@”^2.3.1 || ^3.0.0″ from less–loader@5.0.0
npm ERR! node_modules/less–loader
npm ERR!   dev less–loader@”^5.0.0″ from the root project
npm ERR!
npm ERR! Conflicting peer dependency: less@3.13.1
npm ERR! node_modules/less
npm ERR!   peer less@”^2.3.1 || ^3.0.0″ from less–loader@5.0.0
npm ERR!   node_modules/less–loader
npm ERR!     dev 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 D:Professional SoftwareNodeNodeInsatllnode_cacheeresolve–report.txt for a full report.

解决方法：在安装的 命令后面加

—legacy–peer–deps

具体应用示例如下：

npm install echarts —save —legacy–peer–deps

代码007普通

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