bc518174
 王天杨
提交两个项目文件
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import { addMonths, differenceInCalendarMonths, startOfMonth } from 'date-fns';
import { DayPickerContextValue } from 'contexts/DayPicker';
/** Return the initial month according to the given options. */
export function getInitialMonth(context: Partial<DayPickerContextValue>): Date {
const { month, defaultMonth, today } = context;
let initialMonth = month || defaultMonth || today || new Date();
const { toDate, fromDate, numberOfMonths = 1 } = context;
// Fix the initialMonth if is after the to-date
if (toDate && differenceInCalendarMonths(toDate, initialMonth) < 0) {
const offset = -1 * (numberOfMonths - 1);
initialMonth = addMonths(toDate, offset);
}
// Fix the initialMonth if is before the from-date
if (fromDate && differenceInCalendarMonths(initialMonth, fromDate) < 0) {
initialMonth = fromDate;
}
return startOfMonth(initialMonth);
}
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