JQuery / JQuery Mobile中的格式编号

Question

I am creating an app with Phonegap and JQuery Mobile and have a particular scenario where I need to format a particular counter.

Basically the counter starts from 1 and keeps increasing when a certain event is triggered. However, in order to display it i need to display them as 0001 then once an event is triggered it goes to 0002 .... 0099... 0999... 9999 (max).

So far what I have is outputting the number such as 15, but I cannot find how to put the 00 padding in front so that the value is always displayed as 4 characters.

Can someone help me or direct me to any plugin available?

Thanks!

Answer 1

To format your number, you could do

var formattedNumber = ("000"+number).slice(-4);

EDIT following comment :

You can do this :

 var eventCounter = parseInt($('.eventCount').text(), 10) +1;
 $('.eventCount').text(("000"+number).slice(-4));  

Don't forget the second argument to parseInt , the radix, as parseInt("0009") is 0 ...

But I'd suggest to use an id and not a class as selector : this would be faster as you have only one div. So your HTML would be

<div id=eventCount>0001</div>

And your jQuery selector would be "#eventCount" instead of ".eventCount".