With the upcoming retirement of ArcGIS Map Viewer Classic, a critical issue arises for web maps built using the ArcGIS JavaScript SDK. When a layer's symbology is updated in the new Map Viewer, these changes are not preserved in the layer's definition and therefore do not appear when the layer is loaded through the JavaScript SDK.
How can updated symbology from the new Map Viewer be applied to layers in web maps built with the ArcGIS JavaScript SDK to ensure consistency and compatibility after the transition?
