The timeHeaderBubble property (DayPilot.Bubble class) specifies a bubble object that will be used to show time header cell details on hover.
If timeHeaderBubble is not null, the toolTip value specified in onBeforeTimeHeaderRender will be ignored.
Available since 2025.3.6583.
nullScheduler config:
{
timeHeaderBubble: new DayPilot.Bubble({
onLoad: (args) => {
const cell = args.source;
const date = cell.start.toString("M/d/yyyy");
args.html = `<div>${date}</div>`;
}
}),
// ...
}