An unhandled exception occurred: Cannot find module '@angular-devkit/build-angular/package.json'

再执行启动命令ng s或ng serve时报错了，错误如下：

网上找了好多，都解决不了问题，最后发现@angular-devkit/build-angular这个包是在Angular 6.0中新引入的，安装即可，命令如下：

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

转载自：https://blog.csdn.net/weixin_42740530/article/details/105990467