javascript - 在 javascript 中获取循环的 24 小时日期和时间

Question

当我在下拉列表中选择“过去 24 小时”时，我有一个下拉列表(值为“过去 24 小时”、“过去 48 小时”等) 我需要从现在到昨天的所有日期，间隔一小时。

我试过了，

   var todayDate = new Date();
    if(type=="hours"){ // for hours based drop-down
        var oneDayAgo = new Date(todayDate.getTime());
        oneDayAgo.setDate(todayDate.getDate() - 1);
        console.log("oneDayAgo"+oneDayAgo);
        var hours = todayDate.getHours();
        for(var i = hours; i <= hours+24; i++) {
            if(i<25){
                var newHours=i;
                var newDates=todayDate.getFullYear() + "-" + ("00" + (todayDate.getMonth() + 1)).slice(-2) + "-" + ("00" + todayDate.getDate()).slice(-2) + " " + ("00" +newHours).slice(-2) + ":" + ("00" + todayDate.getMinutes()).slice(-2) + ":" + ("00" + todayDate.getSeconds()).slice(-2);
                console.log(newDates);
            }else{
                var newHours=i-24;
                var newDates=oneDayAgo.getFullYear() + "-" + ("00" + (oneDayAgo.getMonth() + 1)).slice(-2) + "-" + ("00" + oneDayAgo.getDate()).slice(-2) + " " + ("00" +newHours).slice(-2) + ":" + ("00" + oneDayAgo.getMinutes()).slice(-2) + ":" + ("00" + oneDayAgo.getSeconds()).slice(-2);
                console.log(newDates);
            }
        }
    }

我的预期输出是，

例如当前日期和时间是 2014-04-27 13:07 意味着，

输出如 2014-04-27 13:07、2014-04-27 12:07、2014-04-27 11:07、2014-04-27 10:07.... 2014-04-26 13 :07

请帮忙解决这个问题。谢谢

Answer 1

function getDateItems(hours) {
  var toDate = new Date();
  var fromDate = new Date();
  fromDate.setTime(fromDate.getTime() - (hours * 60 * 60 * 1000));
  var result = [];
  
  while (toDate >= fromDate) {
    result.push(toDate.getFullYear() + "-" + ("00" + (toDate.getMonth() + 1)).slice(-2) + "-" + ("00" + toDate.getDate()).slice(-2) + " " + ("00" + toDate.getHours()).slice(-2) + ":" + ("00" + toDate.getMinutes()).slice(-2) + ":" + ("00" + toDate.getSeconds()).slice(-2));
    // consider using moment.js library to format date
    
    toDate.setTime(toDate.getTime() - (1 * 60 * 60 * 1000));
  }

  return result;
}

var datesFrom24Hours = getDateItems(24);
var datesFrom48Hours = getDateItems(48);

console.log(datesFrom24Hours);