Angular 8到Angular 9迁移问题

Question

我已经从angular 8迁移到angular 9，然后我遇到了以下问题，我已经多次删除node_modules并重新安装，但我仍然遇到以下问题：

An unhandled exception occurred: Cannot find module 'webpack/lib/ParserHelpers'
Require stack:
- E:\ng9\Fxt\Web\src\main\ui\material\node_modules\worker-plugin\dist\worker-plugin.js
- E:\ng9\Fxt\Web\src\main\ui\material\node_modules\@angular-devkit\build-angular\src\angular-cli-files\models\webpack-configs\worker.js
- E:\ng9\Fxt\Web\src\main\ui\material\node_modules\@angular-devkit\build-angular\src\angular-cli-files\models\webpack-configs\index.js
- E:\ng9\Fxt\Web\src\main\ui\material\node_modules\@angular-devkit\build-angular\src\browser\index.js
- E:\ng9\Fxt\Web\src\main\ui\material\node_modules\@angular-devkit\build-angular\src\dev-server\index.js
- E:\ng9\Fxt\Web\src\main\ui\material\node_modules\@angular\cli\node_modules\@angular-devkit\architect\node\node-modules-architect-host.js
- E:\ng9\Fxt\Web\src\main\ui\material\node_modules\@angular\cli\node_modules\@angular-devkit\architect\node\index.js
- E:\ng9\Fxt\Web\src\main\ui\material\node_modules\@angular\cli\models\architect-command.js
- E:\ng9\Fxt\Web\src\main\ui\material\node_modules\@angular\cli\commands\serve-impl.js
- E:\ng9\Fxt\Web\src\main\ui\material\node_modules\@angular-devkit\schematics\tools\export-ref.js
- E:\ng9\Fxt\Web\src\main\ui\material\node_modules\@angular-devkit\schematics\tools\index.js
- E:\ng9\Fxt\Web\src\main\ui\material\node_modules\@angular\cli\utilities\json-schema.js
- E:\ng9\Fxt\Web\src\main\ui\material\node_modules\@angular\cli\models\command-runner.js
- E:\ng9\Fxt\Web\src\main\ui\material\node_modules\@angular\cli\lib\cli\index.js
- E:\ng9\Fxt\Web\src\main\ui\material\node_modules\@angular\cli\lib\init.js
- E:\ng9\Fxt\Web\src\main\ui\material\node_modules\@angular\cli\bin\ng
See "C:\Users\ADMIN\AppData\Local\Temp\ng-MOOMPS\angular-errors.log" for further details.
npm ERR! code ELIFECYCLE
npm ERR! syscall spawn
npm ERR! file C:\WINDOWS\system32\cmd.exe
npm ERR! errno ENOENT
npm ERR! material@3.0.0 start: `ng serve --proxy-config proxy.config.json`
npm ERR! spawn ENOENT
npm ERR!
npm ERR! Failed at the material@3.0.0 start script.
npm ERR! This is probably not a problem with npm. There is likely additional logging output above.

npm ERR! A complete log of this run can be found in:
npm ERR!     C:\Users\ADMIN\AppData\Roaming\npm-cache\_logs\2020-11-17T16_17_33_897Z-debug.log

Answer 1

卸载webpack，然后再次全局安装。

npm卸载-g webpack

npm安装webpack -g

卸载cli，然后再次全局安装它。

npm卸载-g @angular/cli

npm安装-g @angular/cli

现在再次尝试安装节点模块。

rm node_modules -r -force

rm包-lock.json

npm缓存验证

npm安装