Task pane addin for outlook web app

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Office

Outlook

AddIn

Hi,

By command Add-in, task pane is going to appear to the right side of outlook desktop app. Similarly, is it possible to have task pane to appear to the right side in the Outlook Web app?

Thanks in advance.

What I have tried:

Till now I hand't found any. I followed the url
https://msdn.microsoft.com/EN-US/library/office/mt267546.aspx.