获取指定月份的日历

getCalendar.js

/**
 * 计算目标月份的日历，返回按星期组合的二维数组
 * @param year
 * @param month
 * @returns {Array|*}
 */
function getDays(year, month) {

    // 目标月份第一天
    let firstDay = moment(`${year}-${month}`, 'YYYY-MM').startOf('month');

    // 目标月份最后一天
    let lastDay = moment(`${year}-${month}`, 'YYYY-MM').endOf('month');

    // 目标月份总天数
    const maxDays = moment(`${year}-${month}`, 'YYYY-MM').daysInMonth();

    let daysArr = [];
    let i = 1;

    for (i; i <= maxDays; i++) {
        daysArr.push(i);
    }

    // 补充第一行内容
    while (firstDay.day() !== 0) {
        firstDay = firstDay.subtract(1, 'days');
        daysArr.unshift(firstDay.format('D'));
    }

    // 补充最后一行内容
    while (lastDay.day() !== 6) {
        lastDay = lastDay.add(1, 'days');
        daysArr.push(lastDay.format('D'));
    }

    return _.chunk(daysArr, 7);

}