DayPilot.Scheduler.onScrollEnd

The onScrollEnd event is fired whenever the user completes the scrolling of the JavaScript Scheduler grid.

Notes:

• Since version 2026.1.6836, this event is always fired after scrolling. In previous versions, it was only fired when dynamic event loading was enabled.

• This event is based on the native scrollend event which may not be supported in all browsers (Safari).

• This event is available since version 2023.3.5731.

Dynamic event loading:

• The only actions allowed in onScrollEnd are to set the args properties and call args.loaded(). Do not change any Scheduler properties in onScrollEnd. Do not call update() method or other methods that refresh the Scheduler [like rows.filter() or rows.load()]. 

• Angular: Do not set [events] attribute if dynamic event loading is enabled. In combination with args.clearEvents = false, this would cause an infinite loop.

• React: Do not set events property if dynamic event loading is enabled. Do not save the events loaded in onScroll to events property. This would cause an infinite loop.

Parameters

• args.control - DayPilot.Scheduler reference

• args.viewport.start (DayPilot.Date) - readonly viewport start date/time

• args.viewport.end (DayPilot.Date) - readonly viewport end date/tiem

• args.viewport.resources (array of resource IDs - strings or numbers) - readonly list of viewport resources

Parameters (Dynamic Event Loading)

• args.control - DayPilot.Scheduler reference (since 2026.1.6836)

• args.viewport.start (DayPilot.Date) - read-only viewport start date/time

• args.viewport.end (DayPilot.Date) - read-only viewport end date/time

• args.viewport.resources (array of resource IDs - strings or numbers) - read-only list of viewport resources

• args.async (boolean) - if set to true, the scheduler won't be updated until args.loaded() is called - use for async data loading; the default value is true

• args.events - array of event data objects (structure defined in DayPilot.Event.data) to be loaded

• args.remove - events to be removed (array of string | number values); experimental - use args.clearEvents = true instead

• args.clearEvents (boolean) - whether to clear all existing events before loading the new ones from args.events; the default value is true

• args.loaded() - performs an async update

See Also

• dynamicLoading

• onScroll

Example

const dp = new DayPilot.Scheduler("dp", {
  dynamicLoading: true,
  onScrollEnd: async (args) {
    args.async = true;

    const start = args.viewport.start;
    const end = args.viewport.end;
    const resources = args.viewport.resources.join(",");
    const {data} = await DayPilot.Http.get(`/api/events?start=${start}&end=${end}&resources=${resources}`);
    args.events = data;

    args.loaded();
    
  },
  // ...
});
dp.init();