topic Re: How to get reference to instance of Legend in LayerList? in ArcGIS JavaScript Maps SDK Questions

How to get reference to instance of Legend in LayerList?

miro_aus — Mon, 25 Sep 2023 03:13:57 GMT

Given example:

Is there a way to get reference to the legend instance created this way? E.g., if I would like to set legend.respectLayerVisibility to false?

Update - current workaround I use is by creating legend instance from Legend widget myself:

const legend = new arcgis.Legend({ view: view, respectLayerVisibility: false, layerInfos: [ { layer: item.layer, }, ], });

And add legend instance created this way to the panel instead of using string 'legend':

item.panel = { content: legend };

Re: How to get reference to instance of Legend in LayerList?

JoelBennett — Mon, 25 Sep 2023 18:26:32 GMT

There doesn't appear to be a way of doing so according to the documentation, but this presently works:

Re: How to get reference to instance of Legend in LayerList?

miro_aus — Wed, 15 Nov 2023 03:46:37 GMT

Thank you, appreciate it.

I have ended up creating legend object for each item in layer list using Legend widget and layerInfos as:

const legend = new Legend({ view: view, layerInfos: [{ title: '', layer: item.layer, },], });

Creating legend by just passing legend string is really convenient way if one doesn't need reference, but until there will be standard way to get a reference I stick with creating legend with these couple of lines.