https://community.esri.com/t5/arcgis-javascript-maps-sdk-questions/programmatically-open-node-on-layerlist-4-x/m-p/1192580#M77938 <P>Hey Mike,</P><P>I know this is a bit late, but I wanted to add a response here since I was looking to do the same thing and finally came across a solution.&nbsp; Hopefully this helps anyone in the future with similar issues...</P><P>This fn recurses over all of the operational items and checks if the layer id matches the passed in id.&nbsp; If it matches, we expand that node and then return back up through the call stack and expand any parents of that node.&nbsp; The optional part I have commented out was a use case of mine which was to hide other results that didn't match the passed in id. (ie. a search input)</P><P>&nbsp;</P><P>&nbsp;</P><LI-CODE lang="javascript">function expand(items: __esri.Collection&lt;__esri.ListItem&gt;, id: string | null) { for (const item of items.toArray()) { if (item.layer.id === id) { // Found the searched for node item.open = true; return true; } else if (expand(item.children, id)) { // Open the item parent item.open = true; return true; } else { /** * Optionally hide other layer items that don't fall in the chain * Requires: ArcGIS API for JavaScript 4.24 * @see https://developers.arcgis.com/javascript/latest/api-reference/esri-widgets-LayerList-ListItem.html#hidden */ // item.hidden = id ? true : false; } } } // Use the operational items on the layerList class instance expand(layerList.operationalItems, "some layer id");</LI-CODE><P>&nbsp;</P><P>&nbsp;</P><P>&nbsp;</P> Fri, 15 Jul 2022 20:25:18 GMT jfeliciani 2022-07-15T20:25:18Z https://community.esri.com/t5/arcgis-javascript-maps-sdk-questions/programmatically-open-node-on-layerlist-4-x/m-p/1014787#M71322 <P>Hi All,</P><P>Wondering if anyone has an example on how to programmatically open a layer list node?&nbsp; I need to be able to open a group layer (in a dynamic map service -- not sure if that matters) when I make that node visible to show the sublayers within that node.</P><P>Thanks!</P><P>Mike</P> Thu, 07 Jan 2021 18:55:52 GMT https://community.esri.com/t5/arcgis-javascript-maps-sdk-questions/programmatically-open-node-on-layerlist-4-x/m-p/1014787#M71322 MichaelSnook 2021-01-07T18:55:52Z https://community.esri.com/t5/arcgis-javascript-maps-sdk-questions/programmatically-open-node-on-layerlist-4-x/m-p/1192580#M77938 <P>Hey Mike,</P><P>I know this is a bit late, but I wanted to add a response here since I was looking to do the same thing and finally came across a solution.&nbsp; Hopefully this helps anyone in the future with similar issues...</P><P>This fn recurses over all of the operational items and checks if the layer id matches the passed in id.&nbsp; If it matches, we expand that node and then return back up through the call stack and expand any parents of that node.&nbsp; The optional part I have commented out was a use case of mine which was to hide other results that didn't match the passed in id. (ie. a search input)</P><P>&nbsp;</P><P>&nbsp;</P><LI-CODE lang="javascript">function expand(items: __esri.Collection&lt;__esri.ListItem&gt;, id: string | null) { for (const item of items.toArray()) { if (item.layer.id === id) { // Found the searched for node item.open = true; return true; } else if (expand(item.children, id)) { // Open the item parent item.open = true; return true; } else { /** * Optionally hide other layer items that don't fall in the chain * Requires: ArcGIS API for JavaScript 4.24 * @see https://developers.arcgis.com/javascript/latest/api-reference/esri-widgets-LayerList-ListItem.html#hidden */ // item.hidden = id ? true : false; } } } // Use the operational items on the layerList class instance expand(layerList.operationalItems, "some layer id");</LI-CODE><P>&nbsp;</P><P>&nbsp;</P><P>&nbsp;</P> Fri, 15 Jul 2022 20:25:18 GMT https://community.esri.com/t5/arcgis-javascript-maps-sdk-questions/programmatically-open-node-on-layerlist-4-x/m-p/1192580#M77938 jfeliciani 2022-07-15T20:25:18Z