Attribute Rules in the Web

[JulieRoebotham]

Was asked by a conference attendee if attribute rules will be supported in the web in the (near) future.

[KoryKramer]

They are supported if you've published by reference: Share datasets with attribute rules—Geodatabases | ArcGIS Desktop 

If the question is about support in hosted feature layers, you could have them go to this idea to up vote and add their use case https://community.esri.com/ideas/16977