ColumnResize

<div id="gantt"></div>
<script>
$("#gantt").kendoGantt({
  columns: ["title", "start", "end"],
  dataSource: [{
     id: 1,
     orderId: 0,
     parentId: null,
     title: "Task1",
     start: new Date("2014/6/17 9:00"),
     end: new Date("2014/6/17 11:00")
  }],
  resizable: true,
  columnResize: function(e) {
/* The result can be observed in the DevTools(F12) console of the browser. */
    console.log(e.column.field, e.newWidth, e.oldWidth);
  }
});
</script>

<div id="gantt"></div>
<script>
function gantt_columnResize(e) {
/* The result can be observed in the DevTools(F12) console of the browser. */
  console.log(e.column.field, e.newWidth, e.oldWidth);
}
$("#gantt").kendoGantt({
  columns: ["title", "start", "end"],
  dataSource: [{
     id: 1,
     orderId: 0,
     parentId: null,
     title: "Task1",
     start: new Date("2014/6/17 9:00"),
     end: new Date("2014/6/17 11:00")
  }],
  resizable: true
});
var gantt = $("#gantt").data("kendoGantt");
gantt.bind("columnResize", gantt_columnResize);
</script>