笔记

如果报错如下：

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.
Error: 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.

 

 

确保根Module中有这3，然后其他的module 中     只需要 “CommonModule”  就行。

 

 

如果继续报错， 仔细看看 导入“imports” 的module中是否导入了“BrowserModule”。