1. 计算时差

  1. function dateDifference(faultDate, completeTime) {
  2.   if (!faultDate || !completeTime) return null
  3.   let stime = new Date(faultDate).getTime()
  4.   let etime = new Date(completeTime).getTime()
  5.   let diffTime = etime - stime // 两个时间戳相差的毫秒数
  6.   let days = Math.floor(diffTime / (24 * 3600 * 1000))
  7.   // 计算出小时数
  8.   let leave1 = diffTime % (24 * 3600 * 1000) // 计算天数后剩余的毫秒数
  9.   let hours = Math.floor(leave1 / (3600 * 1000))
  10.   // 计算相差分钟数
  11.   let leave2 = leave1 % (3600 * 1000) // 计算小时数后剩余的毫秒数
  12.   let minutes = Math.floor(leave2 / (60 * 1000))
  13.   let time = `${days}天 ${hours}时 ${minutes}分`
  14.   // var h = Math.floor(result / 3600);
  15.   // var m = Math.floor((result / 60 % 60));
  16.   // var s = Math.floor((result % 60));
  17.   return { time, days, hours, minutes, diffTime }
  18. }

2. 判断是否为闰年

  1. function isLeapYear(year) {
  2.   return (year % 4 == 0 && year % 100 != 0) || year % 400 == 0;
  3. }

3. 获取指定年月的天数

  1. function getDayNum(year, month) {
  2.   year = parseInt(year);
  3.   month = parseInt(month);
  5.   if ([1, 3, 5, 7, 8, 10, 12].indexOf(month) > -1) {
  6.     return 31;
  7.   } else if ([4, 6, 9, 11].indexOf(month) > -1) {
  8.     return 30;
  9.   } else if ((year % 4 == 0 && year % 100 != 0) || year % 400 == 0) {
  10.     return 29;
  11.   } else {
  12.     return 28;
  13.   }
  14. }

4. 毫秒转换为时分秒格式

  1. function milliTrans(milli) {
  2.   let time = milli / 1000;
  3.   let seconds = parseInt(time % 60);
  4.   if (seconds < 10) {
  5.     seconds = '0' + seconds;
  6.   }
  7.   let minutes = parseInt((time / 60) % 60);
  8.   if (minutes < 10) {
  9.     minutes = '0' + minutes;
  10.   }
  11.   let hours = parseInt((time / 3600) % 60);
  12.   if (hours > 0) {
  13.     console.log(hours);
  14.     return (
  15.       hours +
  16.       ':' +
  17.       (minutes != 0 ? minutes : '00') +
  18.       ':' +
  19.       (seconds != 0 ? seconds : '00')
  20.     );
  21.   } else if (minutes > 0) {
  22.     console.log(minutes);
  23.     return minutes + ':' + (seconds != 0 ? seconds : '00');
  24.   } else {
  25.     return seconds + '秒';
  26.   }
  27. }