Webmap legend order: ascending vs. descending

JoanneMcGraw

I am using a classBreaksRenderer to symbolize a layer in a webmap. The Web Map specification suggests I can use legendOptions' "order" property to indicate the legend should display in ascendingValues or descendingValues (see https://developers.arcgis.com/web-map-specification/objects/legendOptions/).

How/Where can I set that property to ascending in a webmap hosted by AGOL? I've looked around in both  the new and the old Viewer but haven't found the UI. Can anyone point me in the right direction?

Appreciated,

jtm

JoanneMcGraw

Thanks again, Jansen.

I had found that page but was unable to get access to the "New expression" option it suggests should be in the drop down list of fields. Eventually, I realized that the functionality is not available for the service in question because it is being served by a 10.4.1 ArcGIS Server; the functionality was introduced in 10.5.1.

So, after some thought, I've decided that I am principally concerned with how the legend appears in an HTML page where the Web Map is displayed using a copy of the minimalist template we have deployed on our server. I am less concerned with how the legend appears in AGOL's viewers...if they're okay with their legends displaying in that order, then so am I...in their viewers 😉

I'm now looking into setting the legendOptions' "order" property to "ascendingValues" after the WebMap has loaded in my HTML pages. So, not really a solution, per se, because my question was how to change the order in the AGOL viewers but perhaps the post will provide some info to others anyway.

Thanks again, Jansen! If anyone is able to try his suggestion, let me know if it works for reordering a layer's legend items to display in ascending order and I'll add his entry as a solution also.

Joanne