JavaScript/jQuery Scheduler - Disabled Date/Time Ranges

$(() => { $('#scheduler').dxScheduler({ dataSource: data, views: ['workWeek', 'month'], currentView: 'workWeek', currentDate: new Date(2021, 3, 27), firstDayOfWeek: 0, startDayHour: 9, endDayHour: 19, showAllDayPanel: false, height: 730, dataCellTemplate(itemData, itemIndex, itemElement) { const date = itemData.startDate; const element = $('<div />'); if (isDisableDate(date)) { element.addClass('disable-date'); } else if (isDinner(date)) { element.addClass('dinner'); } const isMonth = this.option('currentView') === 'month'; if (isMonth) { element.text(date.getDate()); element.addClass('dx-scheduler-date-table-cell-text'); } return itemElement.append(element); }, dateCellTemplate(itemData, itemIndex, itemElement) { const element = $(`<div>${itemData.text}</div>`); const isMonth = this.option('currentView') === 'month'; const isDisabled = isMonth ? isWeekend(itemData.date) : isDisableDate(itemData.date); if (isDisabled) { element.addClass('disable-date'); } return itemElement.append(element); }, timeCellTemplate(itemData, itemIndex, itemElement) { const element = $(`<div>${itemData.text}</div>`); const { date } = itemData; if (isDinner(date)) { element.addClass('dinner'); } if (hasCoffeeCupIcon(date)) { element.append('<div class="cafe" />'); } return itemElement.append(element); }, onAppointmentFormOpening(e) { const startDate = new Date(e.appointmentData.startDate); if (!isValidAppointmentDate(startDate)) { e.cancel = true; notifyDisableDate(); } applyDisableDatesToDateEditors(e.form); }, onAppointmentAdding(e) { if (!isValidAppointment(e.component, e.appointmentData)) { e.cancel = true; notifyDisableDate(); } }, onAppointmentUpdating(e) { if (!isValidAppointment(e.component, e.newData)) { e.cancel = true; notifyDisableDate(); } }, }); }); const dinnerTime = { from: 12, to: 13 }; const holidays = [ new Date(2021, 3, 29), new Date(2021, 5, 6), ]; function notifyDisableDate() { DevExpress.ui.notify('Cannot create or move an appointment/event to disabled time/date regions.', 'warning', 1000); } function isValidAppointment(component, appointmentData) { const startDate = new Date(appointmentData.startDate); const endDate = new Date(appointmentData.endDate); const cellDuration = component.option('cellDuration'); return isValidAppointmentInterval(startDate, endDate, cellDuration); } function isValidAppointmentInterval(startDate, endDate, cellDuration) { const edgeEndDate = new Date(endDate.getTime() - 1); if (!isValidAppointmentDate(edgeEndDate)) { return false; } const durationInMs = cellDuration * 60 * 1000; const date = startDate; while (date <= endDate) { if (!isValidAppointmentDate(date)) { return false; } const newDateTime = date.getTime() + durationInMs - 1; date.setTime(newDateTime); } return true; } function isValidAppointmentDate(date) { return !isHoliday(date) && !isDinner(date) && !isWeekend(date); } function isHoliday(date) { const localeDate = date.toLocaleDateString(); return holidays.filter((holiday) => holiday.toLocaleDateString() === localeDate).length > 0; } function isWeekend(date) { const day = date.getDay(); return day === 0 || day === 6; } function isDisableDate(date) { return isHoliday(date) || isWeekend(date); } function isDinner(date) { const hours = date.getHours(); return hours >= dinnerTime.from && hours < dinnerTime.to; } function hasCoffeeCupIcon(date) { const hours = date.getHours(); const minutes = date.getMinutes(); return hours === dinnerTime.from && minutes === 0; } function applyDisableDatesToDateEditors(form) { const startDateEditor = form.getEditor('startDate'); startDateEditor.option('disabledDates', holidays); const endDateEditor = form.getEditor('endDate'); endDateEditor.option('disabledDates', holidays); }