js会处理这个:

var momentDate = moment('23.11.2009 12:34:56', 'DD.MM.YYYY HH:mm:ss');
var date = momentDate.;

//Here pdate is the string date time
var date1=GetDate(pdate);
    function GetDate(a){
        var dateString = a.substr(6);
        var currentTime = new Date(parseInt(dateString ));
        var month =("0"+ (currentTime.getMonth() + 1)).slice(-2);
        var day =("0"+ currentTime.getDate()).slice(-2);
        var year = currentTime.getFullYear();
        var date = day + "/" + month + "/" + year;
        return date;
    }

var temp1 = "";
var temp2 = "";

var str1 = fd; 
var str2 = td;

var dt1  = str1.substring(0,2);
var dt2  = str2.substring(0,2);

var mon1 = str1.substring(3,5);
var mon2 = str2.substring(3,5);

var yr1  = str1.substring(6,10);  
var yr2  = str2.substring(6,10); 

temp1 = mon1 + "/" + dt1 + "/" + yr1;
temp2 = mon2 + "/" + dt2 + "/" + yr2;

var cfd = Date.parse(temp1);
var ctd = Date.parse(temp2);

var date1 = new Date(cfd); 
var date2 = new Date(ctd);

if(date1 > date2) { 
    alert("FROM DATE SHOULD BE MORE THAN TO DATE");
}

@Christoph提到使用正则表达式来解决这个问题。这是我正在使用的:

var dateString = "2010-08-09 01:02:03";
var reggie = /(\d{4})-(\d{2})-(\d{2}) (\d{2}):(\d{2}):(\d{2})/;
var dateArray = reggie.exec(dateString); 
var dateObject = new Date(
    (+dateArray[1]),
    (+dateArray[2])-1, // Careful, month starts at 0!
    (+dateArray[3]),
    (+dateArray[4]),
    (+dateArray[5]),
    (+dateArray[6])
);

这绝不是智能的，只需配置正则表达式和new Date(废话)来满足您的需求。

编辑:也许在ES6中使用解构更容易理解:

let dateString = "2010-08-09 01:02:03"
  , reggie = /(\d{4})-(\d{2})-(\d{2}) (\d{2}):(\d{2}):(\d{2})/
  , [, year, month, day, hours, minutes, seconds] = reggie.exec(dateString)
  , dateObject = new Date(year, month-1, day, hours, minutes, seconds);

但说实话，这些天来，我喜欢像Moment这样的东西

js会处理这个:

var momentDate = moment('23.11.2009 12:34:56', 'DD.MM.YYYY HH:mm:ss');
var date = momentDate.;

你可以使用moment.js库。我只使用特定于时间的输出，但你可以选择你想选择的格式。

参考:

1. 时刻库:https://momentjs.com/

2. 时间日期相关功能:https://timestamp.online/article/how-to-convert-timestamp-to-datetime-in-javascript

convertDate(date) {
        var momentDate = moment(date).format('hh : mm A');
        return momentDate;
}

你可以像这样调用这个方法:

this.convertDate('2020-05-01T10:31:18.837Z');

我希望这能有所帮助。喜欢编程。