columns.locked Boolean (default: false)

If set to true, the TreeList will display the column as locked (frozen).

Example - displaying locked columns

<div id="treeList" style="width: 500px"></div>
<script>
  $("#treeList").kendoTreeList({
    columns: [
      { field: "id", locked: true, width: 100},
      { field: "name", width: 200 },
      { field: "age", width: 250 }
    ],
    dataSource: {
      data: [
        { id: 1, parentId: null, name: "Jane Doe", age: 22 },
        { id: 2, parentId: 1, name: "John Doe", age: 24 }
      ]
    }
  });
</script>