How to use getDataList method in Listbox

  <div class="col-lg-12 control-section">
 
      <div id="listbox-control">
 
        <h4>Select your favorite car:</h4>
 
        <input id="listbox">
 
      </div>
 
      <button id= "infobtn">GetDataList</button>
 
    </div>

// Initialize ListBox component.
 
let listObj: ListBox = new ListBox({
 
  // Set the data source property.
 
  dataSource: (data as any).info,
 
  allowDragAndDrop: true
 
});
 
listObj.appendTo("#listbox");
 
 
 
let toggleBtn: Button = new Button({ cssClass: "e-info" });
 
toggleBtn.appendTo("#infobtn");
 
 
 
toggleBtn.element.onclick = (): void => {
 
  let Data = listObj.getDataList();
 
  console.log(Data);
 
};