Hi Shamil,
Thank you for contacting Syncfusion support.
Here are the details about the packages,
@syncfusion/ej2-popups:
That is used to adding the popups component in javascript projects.
@syncfusion/ej2-ng-popups:
It is used to add the popups components in angular project but now the support is deprecated for this module.
@syncfusion/ej2-angular-popups:
That is a latest popups component module, used for adding the popups components in angular project. Hereafter the bug, patch and volumes release will be comes under only this module not in ej2-ng-popups. So, we recommend you to use ej2-angular-popups instead of ej2-ng-popus.
Please get back to us if you need any further assistance.
Thanks,
Christo