jqwidgets-framework/demos/Angular/src/splitter/togglerightpanel/app.component.html

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

<jqxSplitter #mainSplitter
             [width]="getWidth()" [height]="850"
             [panels]="[{ size: 400, collapsible: false }]">
  <div class="splitter-panel">
    Panel 1
  </div>
  <div class="splitter-panel">
    Panel 2
  </div>
</jqxSplitter>