SharePoint Online / Angular - Error: Uncaught Error: Zone already loaded

Regular Visitor

We currently have a serious production issue with two SharePoint Online customers. On Classic Pages when you add an Angular app, the app does not work. There is an error in the console: Zone already loaded.


On Modern Pages Angular apps still works.




According to this post: the workaround is to add the following code.



window.Zone = undefined;



Microsoft is pushing the following file which contains a lot of globally defined functions. That is the cause. I guess everyone which uses Angular apps on Classic Pages will get this error.






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