jqwidgets-scripts-custom/demos/Angular/treegrid/columnshierarchy/src/app/app.component.html

jQWidgets is an advanced jQuery, Angular 7, Vue, React, ASP .NET MVC, Custom Elements and HTML5 UI framework.

<jqxTreeGrid [theme]="'material'" 
             [source]="dataAdapter"
             [altRows]="true"
             [columnsResize]="true"
             [columns]="columns"
             [columnGroups]="columnGroups"
             [ready]="ready"
             #TreeGrid>
</jqxTreeGrid>