How do you display JavaScript datetime in 12 hour AM/PM format?

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慢半拍i

How do you display a JavaScript datetime object in the 12 hour format (AM/PM)?

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27条回答

予麋鹿

2020-11-22 03:06
My suggestion is use moment js for date and time operation.

https://momentjs.com/docs/#/displaying/format/
```
console.log(moment().format('hh:mm a'));
```
```
<script src="//cdnjs.cloudflare.com/ajax/libs/moment.js/2.17.1/moment.min.js"></script>
```
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慢半拍i

2020-11-22 03:06

<script>
var todayDate = new Date();
var getTodayDate = todayDate.getDate();
var getTodayMonth =  todayDate.getMonth()+1;
var getTodayFullYear = todayDate.getFullYear();
var getCurrentHours = todayDate.getHours();
var getCurrentMinutes = todayDate.getMinutes();
var getCurrentAmPm = getCurrentHours >= 12 ? 'PM' : 'AM';
getCurrentHours = getCurrentHours % 12;
getCurrentHours = getCurrentHours ? getCurrentHours : 12; 
getCurrentMinutes = getCurrentMinutes < 10 ? '0'+getCurrentMinutes : getCurrentMinutes;
var getCurrentDateTime = getTodayDate + '-' + getTodayMonth + '-' + getTodayFullYear + ' ' + getCurrentHours + ':' + getCurrentMinutes + ' ' + getCurrentAmPm;
alert(getCurrentDateTime);
</script>

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旧巷少年郎

2020-11-22 03:08

Check out Datejs. Their built in formatters can do this: http://code.google.com/p/datejs/wiki/APIDocumentation#toString

It's a really handy library, especially if you are planning on doing other things with date objects.

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时光说笑

2020-11-22 03:09

Here is another way that is simple, and very effective:

        var d = new Date();

        var weekday = new Array(7);
        weekday[0] = "Sunday";
        weekday[1] = "Monday";
        weekday[2] = "Tuesday";
        weekday[3] = "Wednesday";
        weekday[4] = "Thursday";
        weekday[5] = "Friday";
        weekday[6] = "Saturday";

        var month = new Array(11);
        month[0] = "January";
        month[1] = "February";
        month[2] = "March";
        month[3] = "April";
        month[4] = "May";
        month[5] = "June";
        month[6] = "July";
        month[7] = "August";
        month[8] = "September";
        month[9] = "October";
        month[10] = "November";
        month[11] = "December";

        var t = d.toLocaleTimeString().replace(/:\d+ /, ' ');

        document.write(weekday[d.getDay()] + ',' + " " + month[d.getMonth()] + " " + d.getDate() + ',' + " " + d.getFullYear() + '<br>' + d.toLocaleTimeString());

    </script></div><!-- #time -->

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予麋鹿

2020-11-22 03:10

You can also consider using something like date.js:

<html>
<script type="text/javascript" src="http://www.datejs.com/build/date.js"></script>

<script>
   (function ()
   {
      document.write(new Date().toString("hh:mm tt"));
   })();
</script>
</html>

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Happy的楠姐

2020-11-22 03:10

I fount it's here it working fine.

var date_format = '12'; /* FORMAT CAN BE 12 hour (12) OR 24 hour (24)*/


var d       = new Date();
var hour    = d.getHours();  /* Returns the hour (from 0-23) */
var minutes     = d.getMinutes();  /* Returns the minutes (from 0-59) */
var result  = hour;
var ext     = '';

if(date_format == '12'){
    if(hour > 12){
        ext = 'PM';
        hour = (hour - 12);

        if(hour < 10){
            result = "0" + hour;
        }else if(hour == 12){
            hour = "00";
            ext = 'AM';
        }
    }
    else if(hour < 12){
        result = ((hour < 10) ? "0" + hour : hour);
        ext = 'AM';
    }else if(hour == 12){
        ext = 'PM';
    }
}

if(minutes < 10){
    minutes = "0" + minutes; 
}

result = result + ":" + minutes + ' ' + ext; 

console.log(result);

and plunker example here

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