<script>
    var event = new kendo.data.SchedulerEvent({
        id: 0,
        recurrenceId: 1, //id of the recurrence head event
        title: "Task1",
        start: new Date("2013/4/4"),
        end: new Date("2013/4/4")
    });

    var event2 = new kendo.data.SchedulerEvent({
        id: 1,
        title: "Task1",
        start: new Date("2013/4/4"),
        end: new Date("2013/4/4"),
        recurrenceRule: "FREQ=DAILY"
    });

/* The result can be observed in the DevTools(F12) console of the browser. */
    console.log(event.isRecurring()); //logs 'true'
/* The result can be observed in the DevTools(F12) console of the browser. */
    console.log(event2.isRecurring()); //logs 'true'
</script>