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Recently I have been conducting a lot of training on PowerApps Portals. And every time when I start teaching WebForms, I get this question – What is the significance of Developer extensions in WebForm step.
If you are not able to relate, this is what I am talking about.
And trust me, this is the question I get in almost every training. And if you are not sure of what is that doing there on the form, you would likely to search a lunch break and expect participants to forget it. . What more worrisome, the documentation is not there even in the Microsoft Docs.
Well if you are on this blog, then no more need to take a break. Developer extension tab is an old functionality from Legacy ADX studio portals. And the documentation is still in ADX community docs right here. What you could have done their previously is define a name for the event that could later be used in asp.net code for the webform to programmatically act on the events. Wit h PowerApps portals no longer supporting asp.net code changes the feature has been deprecated.
I am not sure why it is still there on the WebForm step form. But I believe it is a legacy carry over and would be removed at some later point of time.
Hope this helps!
Debajit Dutta
(Microsoft MVP)