jqwidgets-framework/demos/Angular/src/tree/defaultfunctionality/app.component.html

jQWidgets is an advanced Angular, Vue, Blazor, React, Web Components, jquery, ASP .NET MVC, Custom Elements and HTML5 UI framework.

<jqxExpander [width]="300" [height]="400"
             [showArrow]="false" [toggleMode]="'none'">
  <div>
    Folders
  </div>
  <div style="overflow: hidden;">
    <jqxTree #treeReference
             [width]="'100%'" [height]="'100%'" [source]="treeSource">
    </jqxTree>
  </div>
</jqxExpander>