js计算时间差

export const getTimeValue = (start, end)=>{
    var stime =new Date(start).getTime();
    var etime = new Date(end).getTime();
    var usedTime = etime - stime;  //两个时间戳相差的毫秒数
    var days=Math.floor(usedTime/(24*3600*1000));
    //计算出小时数
    var leave1=usedTime%(24*3600*1000);    //计算天数后剩余的毫秒数
    var hours=Math.floor(leave1/(3600*1000));
    //计算相差分钟数
    var leave2=leave1%(3600*1000);        //计算小时数后剩余的毫秒数
    var minutes=Math.floor(leave2/(60*1000));
    // var time = days + "天"+hours+"时"+minutes+"分";
    var time = days;
    return time;
}