在 javascript 中获取循环的 24 小时日期和时间

Question

我有一个下拉列表（值是“过去 24 小时”、“过去 48 小时”等），当我在下拉列表中输入 select“过去 24 小时”时，我需要从现在到昨天的所有日期，间隔为一小时。

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);
            }
        }
    }

我预期的 output 是，

例如当前日期和时间是 2014-04-27 13:07 意味着，

output 喜欢 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

这是一个工作样本 ，可能是你想要的。

//get type and hoursOption from dropdowns
var type = 'hours'
var hoursOption = 48;

var todayDate = new Date();

if(type=="hours"){ // for hours based drop-down

    var hours = todayDate.getHours();
    for(var i = hours; i <= hours + hoursOption; i++) {
            todayDate.setHours(todayDate.getHours() - 1)
        var newDates = todayDate.getFullYear() + "-" + ("00" + (todayDate.getMonth() + 1)).slice(-2) + "-" + ("00" + todayDate.getDate()).slice(-2) + " " + ("00" + todayDate.getHours()).slice(-2) + ":" + ("00" + todayDate.getMinutes()).slice(-2) + ":" + ("00" + todayDate.getSeconds()).slice(-2);
            console.log(newDates);

    }
}

对于for-loop变量hours我添加了来自下拉选项的hourOption ，例如。 24,48,72等

在内部循环中你需要todayDate ，然后再减少一个小时，所以它将显示向后计数的小时数。

Answer 2

 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); 

Answer 3

这对我有用

const start = new Date("2022-01-01T00:00:00");
    const end = new Date("2022-01-01T23:00:00");
    
    for (let current = start; current <= end; current.setHours(current.getHours() + 1)) {
        console.log(current);
    }