Provide the AddToCurrentScopeOnly in the RoleAssignment class for JSOM and CSOM
The SharePoint "fine grain permissions" best practices document recommends using this method as a way to help prevent performance penalties when unique permissions are applied. However, we need this capability in JSOM and CSOM since AddToCurrentScopeOnly is currently only available for use on-premises using the server-side object model.

3 comments
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Robbie commented
Yes we need this for an enterprise projects
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jon lyall commented
Yes this is really needed!
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Rajya commented
Yes, I do agree with Michael and we need this capability in JSOM, CSOM and REST API.