Row header click isn't working

Hello, according to https://doc.daypilot.org/scheduler/row-header-click/
I tried to do the following in DayPilotSchedulerConfig:
RowClickJavaScript = "headerClick(e)",
RowClickHandling = RowClickHandlingType.JavaScript

In javascript:
var headerClick = function (e) {
alert(e);
};

But it doesn't work, I click on row headers and nothing happens (other actions like move/resize/etc. work successfully) could you help me with that