DataBound

<div id="treemap"></div>
<script>
  $("#treemap").kendoTreeMap({
    dataSource: {
      data: [{
        name: "test",
        items: [{
          category: "foo",
          value: 1,
          color: "#3073ad"
        }]
      }]
    },
    valueField: "value",
    textField: "category",
    colorField: "color",
    dataBound: function(e) {
/* The result can be observed in the DevTools(F12) console of the browser. */
      console.log("DataBound");
    }
  });
</script>

<div id="treemap"></div>
<script>
  function dataBound(e) {
/* The result can be observed in the DevTools(F12) console of the browser. */
    console.log("DataBound");
  }

  $("#treemap").kendoTreeMap({
    dataSource: {
      data: [{
        name: "test",
        items: [{
          category: "foo",
          value: 1,
          color: "#3073ad"
        }]
      }]
    },
    autoBind: false,
    valueField: "value",
    textField: "category",
    colorField: "color"
  });
  var treemap = $("#treemap").getKendoTreeMap();
  treemap.bind("dataBound", dataBound);
  treemap.dataSource.fetch();
</script>