Angular 8:运行ng serve时“找不到构建器的实现”

Question

我刚刚安装了Angular 8。当我尝试使用"ng serve --open“运行一个项目时，它给出了以下错误：

Could not find the implementation for builder @angular-devkit/build-angular:dev-server
Error: Could not  find the implementation for builder @angular-devkit/build-angular:dev-server
    at WorkspaceNodeModulesArchitectHost.resolveBuilder (C:\Users\manus\project\space-estate\webshop\frontend\client\node_modules\@angular\cli\node_modules\@angular-devkit\architect\node\node-modules-architect-host.js:49:19)
    at ServeCommand.initialize (C:\Users\manus\project\space-estate\webshop\frontend\client\node_modules\@angular\cli\models\architect-command.js:72:63)
    at process._tickCallback (internal/process/next_tick.js:68:7)
    at Function.Module.runMain (internal/modules/cjs/loader.js:744:11)
    at startup (internal/bootstrap/node.js:285:19)
    at bootstrapNodeJSCore (internal/bootstrap/node.js:739:3)

当我检查版本时，它给我提供了以下信息：

Angular CLI: 8.0.1
Node: 10.13.0
OS: win32 x64
Angular: 8.0.0
... animations, common, compiler, compiler-cli, core, forms
... language-service, platform-browser, platform-browser-dynamic
... router

Package                           Version
-----------------------------------------------------------
@angular-devkit/architect         0.13.9
@angular-devkit/build-angular     0.13.9
@angular-devkit/build-optimizer   0.13.9
@angular-devkit/build-webpack     0.13.9
@angular-devkit/core              8.0.1
@angular-devkit/schematics        8.0.1 (cli-only)
@ngtools/webpack                  7.3.9
@schematics/angular               8.0.1 (cli-only)
@schematics/update                0.800.1 (cli-only)
rxjs                              6.5.2
typescript                        3.4.5
webpack                           4.29.0

Answer 1

使用此命令

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

Answer 2

如果您使用的是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

Answer 3

这似乎是@angular-devkit/build-angular的问题，请尝试降级到特定版本

npm i @angular-devkit/build-angular@0.803.24

这个版本适用于我。