✨ Add the types for the Flatpickr custom options for the widget

Related to open-formulieren/open-forms#3755 where the widget needs to have a configuration option set so that invalid values are not automatically removed from the widget

src/formio/components/date.ts

@@ -5,6 +5,7 @@ import {
   PastDateConstraint as BasePastDateConstraint,
   DateConstraintConfiguration,
   DatePickerConfig,
+  PickerCustomOptions,
 } from '../dates';
 
 type Validator = 'required';
@@ -33,6 +34,7 @@ export interface BaseDateComponentSchema extends Omit<DateInputSchema, 'hideLabe
     maxDate?: Exclude<DateConstraintConfiguration, FutureOrPastDateConstraint> | PastDateConstraint;
   };
   datePicker?: DatePickerConfig;
+  customOptions?: PickerCustomOptions;
 }
 
 /**

src/formio/components/datetime.ts

@@ -5,6 +5,7 @@ import {
   DatePickerConfig,
   FutureDateConstraint,
   PastDateConstraint,
+  PickerCustomOptions,
 } from '../dates';
 
 type Validator = 'required';
@@ -25,6 +26,7 @@ export interface BaseDateTimeComponentSchema
     maxDate?: Exclude<DateConstraintConfiguration, FutureDateConstraint>;
   };
   datePicker?: DatePickerConfig;
+  customOptions?: PickerCustomOptions;
 }
 
 /**

src/formio/dates.ts

@@ -83,3 +83,8 @@ export interface DatePickerConfig {
   minDate: string | null;
   maxDate: string | null;
 }
+
+/** Flatpickr specific custom options for the widget **/
+export interface PickerCustomOptions {
+  allowInvalidPreload: boolean;
+}