jquery hasClass, can it be given the beginning of class name, to get the full class name

Question

I'm trying to do something similar to this question, but it's a bit different, so the solution there isn't working for me.

<span class="a-class another-class test-top-left"></span>

I have an element (this code shows a span but it could be div span or anything). This element has a class beginning with test- (test-top-left, test-top-right etc.) I've triggered a click event on classes starting with test- and saved the clicked object as var object = this;. Simple stuff so far.

What I'm trying to do now is get the full name of that class (test-top-left). I know it starts with test- but what's the full name. The thing is that there are other classes a-class another-class and test-top-left. Can hasClass be used to get the full name of the class? I'd prefer not to use find() or filter() just because there may be additional elements within that also have class="test-"

Edit:

The code I have now is, but it gives me ALL the classes. What I need is the single class beginning with test-.

var object = this;
$(object).attr('class'); 

So now I for loop through all the classes and test each one separately, which seems like a lot of unnecessary code. I'm hoping jQuery has a clever way to get the exact class that was clicked right away.

Answer 1

Description

You can use jQuerys Attribute Contains Selector, .attr() and .click() method.

Attribute Contains Selector - Selects elements that have the specified attribute with a value containing the a given substring.

.attr() - Get the value of an attribute for the first element in the set of matched elements.

.click() - Bind an event handler to the "click" JavaScript event, or trigger that event on an element.

Sample

html

<span class="anyclass test-hello">Hello World</span>​

jQuery

$("[class*='test']").click(function() {
    var object = $(this);
    alert(object.attr("class").match(/(test-.*?)(?:\s+|$)/)[1])
;});

Check out the updated jsFiddle

Update

If you dont want to use regex you can do this.

$("[class*='test']").click(function() {
    var object = $(this);
    alert("test-" + object.attr("class").split("test-")[1].split("-"))
;});

​

More Information

• jQuery - Attribute Contains Selector
• jQuery - .attr()
• jQuery - .click()
• jsFiddle Demonstration