get array of days in month

days-in-month.js

import { getYear } from 'date-fns';

getDaysInMonth(month): Array<number> {
    const date = new Date(getYear(new Date()), month, 1);
    const days = [];
    while (date.getMonth() === month) {
      days.push({ name: new Date(date).getDate() });
      date.setDate(date.getDate() + 1);
    }
    return days;
}