In the WAB LayerList for layers like Weather Watches/Warnings there can be dozens of symbols but only a few are usually visible in the extent at a time. It would be useful to have a checkbox to allow developers to only display symbols for layers where the symbology is visible in the current map extent, for layerList and Legend. Would be useful for complex layers with many symbols such as soil survey etc. Perhaps in an update?
I saw this for Legend but nothing for LayerList. Hope I haven't duplicated any threads and I'll create an idea if there is initial interest.Legend Limited to features in extent as default
Here is an idea - https://community.esri.com/ideas/13336