JavaScript/jQuery SelectBox - Customize Group Headers

By default, group headers display text of the key field in a bold font. If you need a more flexible solution, specify groupTemplate.

HTML
TypeScript
  • <dx-select-box
  • [dataSource]="selectBoxDataSource"
  • [grouped]="true"
  • groupTemplate="group"
  • displayExpr="name"
  • valueExpr="count">
  • <div *dxTemplate="let data of 'group'">
  • <p>{{data.key}} | Count: {{data.overallCount}}</p>
  • </div>
  • </dx-select-box>
  • import { DxSelectBoxModule } from "devextreme-angular";
  • import DataSource from "devextreme/data/data_source";
  • // ...
  • export class AppComponent {
  • fruitsVegetables = [{
  • key: "Fruits",
  • items: [
  • { name: "Apples", count: 10 },
  • { name: "Oranges", count: 12 },
  • { name: "Lemons", count: 15 }
  • ]
  • }, {
  • key: "Vegetables",
  • items: [
  • { name: "Potatoes", count: 5 },
  • { name: "Tomatoes", count: 9 },
  • { name: "Turnips", count: 8 }
  • ]
  • }];
  • selectBoxDataSource = new DataSource({
  • store: this.fruitsVegetables,
  • map: function(groupedItem) {
  • let overallCount = 0;
  • groupedItem.items.forEach(function(item) {
  • overallCount += item.count;
  • })
  • return Object.assign(groupedItem, { overallCount: overallCount });
  • }
  • });
  • }
  • @NgModule({
  • imports: [
  • // ...
  • DxSelectBoxModule
  • ],
  • // ...
  • })

View Demo

See Also