idea Add blendMode property to ArcGIS API for JavaScript 4.x in ArcGIS JavaScript Maps SDK Ideas

Add blendMode property to ArcGIS API for JavaScript 4.x

tianleili — Tue, 07 Apr 2020 12:06:05 GMT

I draw polylines in ArcGIS API for JavaScript 4.x. When the polylines is very dense, there will be no bright effect of gathering. In other libraries, such as echarts, there is an attribute blendMode to handle this situation, which calls ctx.globalCompositeOperation = "lighter" to display the aggregation effect. Can ArcGIS API for JavaScript provide a similar approach?

Re: Add blendMode property to ArcGIS API for JavaScript 4.x

KristianEkenes — Thu, 08 Sep 2022 15:31:59 GMT

The JS API does support various blend modes and effects on the layer level.

https://developers.arcgis.com/javascript/latest/api-reference/esri-layers-FeatureLayer.html#blendMode

https://developers.arcgis.com/javascript/latest/api-reference/esri-layers-FeatureLayer.html#effect

We also have a guide to visualizing high density data where we talk about bloom as a way to accomplish this: https://developers.arcgis.com/javascript/latest/visualization/high-density-data/bloom/

There are other techniques as well, like using opacity. Hopefully this helps.

Re: Add blendMode property to ArcGIS API for JavaScript 4.x - Status changed to: Implemented

BjornSvensson — Thu, 08 Sep 2022 15:42:37 GMT