JavaScript API 3.11 FeatureLayer Label expression

[EricMcPhee]

I have added a featurelayer to my application and I want it to label based upon the label expression setup in the map service. This works if I use a simple expression (a single field), but the labels fail to draw if I concatenate two fields together in the map service (Label Expression: [TOWN] CONCAT "-" CONCAT [RANG]). Anybody have any insight??

[GarimaDhakal]

Unfortunately this is a known limitation. The API does not recognize language construction like CONCAT. The workaround is to use LabelLayer.