js 日期相差計算

 

get_time_diff(time) {
    var diff = '';
    var time_diff =time - new Date().getTime(); //時間差的毫秒數 

    //計算出相差天數 
    var days = Math.floor(time_diff / (24 * 3600 * 1000));
    if (days > 0) {
      diff += days + '天';
    }
    //計算出小時數 
    var leave1 = time_diff % (24 * 3600 * 1000);
    var hours = Math.floor(leave1 / (3600 * 1000));
    if (hours > 0) {
      diff += hours + '小時';
    } else {
      if (diff !== '') {
        diff += hours + '小時';
      }
    }
    //計算相差分鍾數 
    var leave2 = leave1 % (3600 * 1000);
    var minutes = Math.floor(leave2 / (60 * 1000));
    if (minutes > 0) {
      diff += minutes + '分';
    } else {
      if (diff !== '') {
        diff += minutes + '分';
      }
    }
    //計算相差秒數 
     var leave3 = leave2 % (60 * 1000);
     var seconds = Math.round(leave3 / 1000);
     if (seconds > 0) {
       diff += seconds + '秒';
     } else {
       if (diff !== '') {
         diff += seconds + '秒';
       }
     }
    return diff;
  }

 

　　參數time為時間戳

　　獲取第二天0點時間戳  

　　today = new Date(new Date(new Date().setDate(new Date().getDate()+1)).setHours(0,0,0,0));