react-day-picker
Version:
Customizable Date Picker for React
26 lines • 905 B
JavaScript
/**
* Returns the start date of the week in the broadcast calendar.
*
* The broadcast week starts on Monday. If the first day of the month is not a
* Monday, this function calculates the previous Monday as the start of the
* broadcast week.
*
* @since 9.4.0
* @param date The date for which to calculate the start of the broadcast week.
* @param dateLib The date library to use for date manipulation.
* @returns The start date of the broadcast week.
*/
export function startOfBroadcastWeek(date, dateLib) {
const firstOfMonth = dateLib.startOfMonth(date);
const dayOfWeek = firstOfMonth.getDay();
if (dayOfWeek === 1) {
return firstOfMonth;
}
else if (dayOfWeek === 0) {
return dateLib.addDays(firstOfMonth, -1 * 6);
}
else {
return dateLib.addDays(firstOfMonth, -1 * (dayOfWeek - 1));
}
}
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