JQuery get the rest of the element's class name that starts with string "whatever-"

Question

I have js that caches classes that's name starts with "whatever-",

$('[class^="whatever-"], [class*=" whatever-"]')

but what I want now to do is get the rest of the name, for example in case of "whatever-9" I want to get "9", I don't know how to do it, can you help me?

Answer 1

Try this

var check = "whatever-";         
    $('[class^="whatever-"], [class*=" whatever-"]').each(function () {    
        // Get array of class names   
        var cls = $(this).attr('class').split(' ');       
        for (var i = 0; i < cls.length; i++) {
            // Iterate over the class and log it if it matches
            if (cls[i].indexOf(check) > -1) {        
                console.log(cls[i].slice(check.length, cls[i].length));
            }       
        }    
    });

This should also work for the case when there is more than 1 class. There may be cleaner ways of doing this by using filter method and a bit of regex

Check Fiddle

A little cleaner using map

var check = "whatever-";
$('[class^="whatever-"], [class*=" whatever-"]').each(function () {
    var className = this.className;

    var cls = $.map(this.className.split(' '), function (val, i) {
        if (val.indexOf(check) > -1) {
            return val.slice(check.length, val.length)
        }
    });

    console.log(cls.join(' '));
});

Map demo

Answer 2

Maybe there are better ways, but this works. Check the console.

DEMO

$('[class^="whatever-"], [class*=" whatever-"]').each(function () {
    var classname = this.className;
    var classsparts = classname.split('whatever-');
    var result = classsparts[1]
    console.log(result);
});

This is assuming you just have one class in the elements you are targeting with your selectors.