Jeff Jeff - 1 year ago 176
jQuery Question

jQuery function to to format number with commas and decimal

I'm using the following function to format numbers as the user types. It will insert a comma every 3 numbers. Ex:


However, I've run into a problem with it. If the numbers after the decimal are longer than 3 digits, it starts adding commas to them. Ex:

This is my function:

$.fn.digits = function(){
return this.each(function() {
$(this).val( $(this).val().replace(/[^0-9.-]/g, '') );
$(this).val( $(this).val().replace(/(\d)(?=(\d\d\d)+(?!\d))/g, "$1,") );

How can I fix this so it stops placing commas after the decimal? I'm using jQuery 1.8. Thanks!

Answer Source

You could accomplish this by splitting your string at the '.' character and then performing your comma-conversion on the first section only, as such:

function ReplaceNumberWithCommas(yourNumber) {
    //Seperates the components of the number
    var n= yourNumber.toString().split(".");
    //Comma-fies the first part
    n[0] = n[0].replace(/\B(?=(\d{3})+(?!\d))/g, ",");
    //Combines the two sections
    return n.join(".");

ReplaceNumberWithCommas(1136.6696); //yields 1,136.6696


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