onBeforeEventChanged

Description

Fires when the event has been changed by drag-n-drop, but the changes aren't saved yet.

onBeforeEventChanged: (ev: object, e: Event, is_new: boolean, original: object) => boolean

Parameters

• ev - (required) object - the event's data object after changes
• e - (required) Event - a native event object
• is_new - (required) boolean - returns 'true' if the user changes a new event; 'false' if the edited event already exists
• original - (required) object - the event's data object before changes

Returns

• result - (boolean) - defines whether the default action of the event will be triggered (true) or canceled (false)

Example

scheduler.attachEvent("onBeforeEventChanged", (ev, e, is_new, original) => {
    // any custom logic here
    return true;
});

Details

The event occurs when a new event is added or an existing one is changed by drag-and-drop.

• Beware that the first parameter of the handler function takes the data item object, not the data item's id, because newly created data items may not have an ID yet.
• The unmodified event will be an empty object when creating new data items.
• The event is blockable: returning false from the handler will prevent the data update.