计算两个日期之间有多少工作日

function getWeekdays(startDate, endDate){
    // 字符串转为日期
    const start = new Date(startDate);
    const end = new Date(endDate);
    // 时间戳
    const startTime = start.getTime();
    const endTime = end.getTime();
    //共多少天
    const days = Math.abs((endTime - startTime) / (1000*60*60*24)) + 1;
    //开始是周几
    let startweek = start.getDay();
    //有几个周六或周日
    let weeks = 0;
    for (var i = 0; i < days ; i++) {
        //如果开始日期是周六日，weeks+1,否则，验证下一天
        if (startweek == 0  || startweek == 6) {
            weeks ++;
        }
        //下一天的时间戳
        startweek = startTime + (1000 * 60 * 60 * 24 * (i+1));
        //下一天是周几
        startweek = new Date(startweek).getDay();
    }
    // 总天数-周日天数
    const num = days - weeks;
    return num;
}

//测试
let num = getWeekdays('2022-02-11','2022-03-01')
console.log(num);