1. First, npm uninstall element-ui, and then report an error
npm err! Code EEXIST
npm err! Errno-4075
npm err! Syscall mkdir
npm err! EEXIST: file already exists, mkdir"Clux UserspeterDesktoptestheUserspeterUserspeterDesktoptestheUserServiceUserspeterUserspeterDesktoptestheUserspeterUserspeterDesktoptestheUserspeterUserspeterDesktoptesthesaurus servicecopyright provider File exists: C:UserspeterDesktoptesthes-service-provider-frontendnode_modules.stagingsource-map-0b5df56a
npm err! Move it away, and try again.
npm err! A complete log of this run can be found in:
npm err! C:UserspeterAppDataRoamingnpm-cache_logs2018-10-29T07_38_40_404Z-debug.log
2. After installing the new version of element-ui, it indicates that
Installed 1 packages
Linked 7 latest versions
Run 0 scripts
root All packages installed (1 packages installed from npm registry, used 1s (network 1s), speed 546.34kB packages installed from npm registry, used s, json 8 (560.55kB), tarball 0B)
3. The result depends on whether the dependent file version of the project is the previous version