将angular CLI升级到8

Question

在更新Angular Cli to 8版本时，我遇到了以下错误。

Could not find module "@angular-devkit/build-angular" from "C:\\Users\\AGT\\Desktop\\central8\\client".
Error: Could not find module "@angular-devkit/build-angular" from "C:\\Users\\AGT\\Desktop\\central8\\client".
    at Object.resolve (C:\Users\AGT\AppData\Roaming\npm\node_modules\@angular\cli\node_modules\@angular-devkit\core\node\resolve.js:151:11)
    at WorkspaceNodeModulesArchitectHost.resolveBuilder (C:\Users\AGT\AppData\Roaming\npm\node_modules\@angular\cli\node_modules\@angular-devkit\architect\node\node-modules-architect-host.js:31:40)
    at ServeCommand.initialize (C:\Users\AGT\AppData\Roaming\npm\node_modules\@angular\cli\models\architect-command.js:135:55)
    at process._tickCallback (internal/process/next_tick.js:68:7)
    at Function.Module.runMain (internal/modules/cjs/loader.js:757:11)
    at startup (internal/bootstrap/node.js:283:19)
    at bootstrapNodeJSCore (internal/bootstrap/node.js:622:3)

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Answer 1

npm uninstall -g @angular/cli
npm cache verify
npm install -g @angular/cli@latest

然后在本地项目包中：

rm -rf node_modules dist 
npm install --save-dev @angular/cli@latest
npm i 
ng update --all --force
npm install --save-dev @angular-devkit/build-angular

您的应用程序现已升级到最新版本

Answer 2

如果您要升级到Angular 8，您应该通过运行以下命令来确保您的Angular包可以安全地updated到当前稳定版本

ng update

否则，您可以尝试手动更新@angular/cli和核心框架包。

ng update @angular/cli @angular/core

或者，您也可以直接使用npm安装/更新它。

npm install --save-dev @angular-devkit/build-angular

可以在here上找到逐步的Angular升级指南。