I want a less-persistent popup, where a click outside of its boundaries would close it. To give a real world example, the Share Snippet feature in REPL works in such a way.

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Telerik edit: A workaround for the time being is to attach a JavaScript click handler that closes the Popup instance:  https://blazorrepl.telerik.com/GyumGrEs22yZgoCD16 

The Popup OnHide event does not fire if the app has previously closed the Popup instance programmatically with the Hide() method.

The issue can be reproduced in this documentation example.