报错

PS E:\ES6\vue2\vue_2\demo> npm install vue-router@4
npm ERR! code ERESOLVE
npm ERR! ERESOLVE unable to resolve dependency tree
npm ERR! 
npm ERR! Found: vue@2.7.14
npm ERR! node_modules/vue
npm ERR!   vue@"^2.6.14" from the root project
npm ERR! 
npm ERR! Could not resolve dependency:
npm ERR! peer vue@"^3.2.0" from vue-router@4.1.6
npm ERR! node_modules/vue-router
npm ERR!   vue-router@"4" 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\keyter\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\keyter\AppData\Local\npm-cache\_logs\2023-01-21T05_25_33_325Z-debug-0.log
PS E:\ES6\vue2\vue_2\demo> npm install vue-router --save
npm ERR! code ERESOLVE
npm ERR! ERESOLVE unable to resolve dependency tree
npm ERR!
npm ERR! Found: vue@2.7.14
npm ERR! node_modules/vue
npm ERR!   vue@"^2.6.14" from the root project
npm ERR!
npm ERR! Could not resolve dependency:
npm ERR! peer vue@"^3.2.0" from vue-router@4.1.6
npm ERR! node_modules/vue-router
npm ERR!   vue-router@"*" 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\keyter\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\keyter\AppData\Local\npm-cache\_logs\2023-01-21T05_45_03_692Z-debug-0.log
PS E:\ES6\vue2\vue_2\demo> npm i vue-router -S
npm ERR! code ERESOLVE
npm ERR! ERESOLVE unable to resolve dependency tree
npm ERR!
npm ERR! Found: vue@2.7.14
npm ERR! node_modules/vue
npm ERR!   vue@"^2.6.14" from the root project
npm ERR!
npm ERR! Could not resolve dependency:
npm ERR! peer vue@"^3.2.0" from vue-router@4.1.6
npm ERR! node_modules/vue-router
npm ERR!   vue-router@"*" 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\keyter\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\keyter\AppData\Local\npm-cache\_logs\2023-01-21T05_47_41_052Z-debug-0.log

原因

：版本错误

使用建议版本

：

• npm install --legacy-peer-deps vue-router@3.2.0

参考

• https://blog.csdn.net/weixin_43786395/article/details/122963608