Check of the first text node is a number

Question

I want to check to see if the first node of a div is number and if it's null I'll display a div or not.

http://jsfiddle.net/NsXsa/

            $(".carcount").bind("DOMSubtreeModified",function(){

    $(function() {
        $(".carcount span").filter(function() {
            var carnumber = get(0).firstChild.data; 

            if ($.isNumeric(carnumber)) {
                $('.carcount').css({ 'display': 'none' });
                    }                   

            else {
                $('.carcount').css({ 'display': 'block' });
                }                       
        });
    });
}); 

Answer 1

Use this :

$.isNumeric(carnumber )

It's a built in function in jquery.

https://api.jquery.com/jQuery.isNumeric/

Answer 2

Check console and see whats the value of carnumber using console.log(carnumber)

You might also have to use parseInt() to convert string to number.

 $(".carcount").bind("DOMSubtreeModified",function(){
    $(function() {
        $(".carcount").filter(function() {
            var carnumber = parseInt(get(0).firstChild.data, 10); 
            if ( carnumber < 2 ) {
                $('.extra-zero').css({ 'display': 'none' });
                    }                   
            else {
                $('.extra-zero').css({ 'display': 'inline' });
                }                       
        });
    });
});