Javascript mask

Question

How do you format a number to show 2 decimals in JavaScript?

Something along the lines of: format(x,"9,999.99");

Answer 1

I'm not sure if you are trying to do this to input or just for displaying text on the page. You can use the masked input plugin for jQuery if you are trying to format input.

http://digitalbush.com/projects/masked-input-plugin/

Answer 2

var num = 3.14159;
var fixed = num.toFixed(2);

If you want the commas depending on the locale:

var localed = num.toLocaleString();

Combining both crudely:

var num = 3.14159;
var fixed = num.toFixed(2);
var fixednum = parseFloat(fixed);
var localedFixed = fixednum.toLocaleString();

Answer 3

You should use this :

x.toFixed(2);

or if you want to be sure it will work :

parseFloat(x).toFixed(2);

Answer 4

Use .toFixed(2):

http://www.devguru.com/technologies/javascript/17443.asp

Note this will round your number:

var i = 23.778899;
alert(i.toFixed(2));

gives you

23.78