beforeChange

fires before changing the value of a control

beforeChange: (value: string | Date) => boolean | void;

Parameters:

• value: string | Date - the value to be set for the control

Returns:

Return false to prevent changing the value of the control; otherwise, true.

Example

form.getItem("datepicker").events.on("beforeChange", function(value) {
    console.log("beforeChange", value);
    return false;
});

Change log: The event was added in v8.0