groupTitleTemplate

Optional. Sets a template to the title of a group

groupTitleTemplate?: (groupName: string, groupItems: object[]) => string;

Example

const treegrid = new dhx.TreeGrid("treegrid_container", {
    columns: [
        // columns config
    ],
    
    groupTitleTemplate: (groupName, groupItems) => {
        return groupName + "count:" + groupItems.length
    }
});

Related sample: TreeGrid. Group data items by a property

Change log:

added in v6.5