I would like to see the support added to the web API's and ArcGIS Online to support conditional formatting. For example, a customer calls in a complaint and a feature is created and the status is set to open. When I view that complaint in a web application, Collector or Ops Dashoard I would like to configure the Popup with the logic that says while status = "Open": font for that item is Red. Else: font is Green.
This idea has been marked as a duplicate of Web Maps: configurable pop-up conditional formatting. Please up vote the linked idea to show your support