import { Component, ViewChild } from '@angular/core'; import { jqxTreeComponent } from 'jqwidgets-scripts/jqwidgets-ts/angular_jqxtree'; import { jqxDropDownButtonComponent } from 'jqwidgets-scripts/jqwidgets-ts/angular_jqxdropdownbutton'; @Component({ selector: 'app-root', templateUrl: './app.component.html' }) export class AppComponent { @ViewChild('myTree') myTree: jqxTreeComponent; @ViewChild('myDropDownButton') myDropDownButton: jqxDropDownButtonComponent; myTreeOnInitialized(): void { this.myDropDownButton.setContent('
Home
'); } myTreeOnSelect(event: any): void { let item = this.myTree.getItem(event.args.element); let dropDownContent = '
' + item.label + '
'; this.myDropDownButton.setContent(dropDownContent); }; }