jQuery - Change 1-24 hour to 1-12 hour using .getHours() method?

问题

Fiddle: http://jsfiddle.net/bnsex/1/

I want to use 12 hour clock for this code...

$(document).ready(function() {

setInterval( function() {
var hours = new Date().getHours();
$(".hours, .hour").html(( hours < 10 ? "0" : "" ) + hours);
}, 1000);

}); ​

Your help is much appreciated :D

回答1:

You can achieve this using the modulus % operator, which finds the remainder of a division operation.

For example, 11 % 12 and 23 % 12 both equal 11, like a 12-hour clock would portray.

var hours = new Date().getHours() % 12;
if (hours == 0) {
    hours += 12;
}

http://jsfiddle.net/ph7Vf/

回答2:

Try with this:

hours = (hours < 12 ? hours : hours - 12).toString().replace(/^\d{1}$/, '0$&');

Edit: It could be shorter, based on Vulcan's answer:

hours = (hours % 12).toString().replace(/^\d{1}$/, '0$&');

来源：https://stackoverflow.com/questions/13284122/jquery-change-1-24-hour-to-1-12-hour-using-gethours-method