错误信息：BrowserModule has already been loaded. If you need access to common directives such as NgIf and NgFor from a lazy loaded module, import CommonModule instead.
问题：BrowserModule, BrowserAnimationsModule, 只需要在appModal导入一次即可
检查项目时候有多次被导入
标签：instead,lazy,already,module,CommonModule,need,loaded,BrowserModule From： https://www.cnblogs.com/jing5990/p/16821357.html