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
- ],
- // ...
- })
See Also
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