javascript - Get current element's classes in jQuery - Stack Overflow

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​<button id="test" class="example whatever">Show classes</button>​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​

$('button').click(function(){
  var classes = $(this).attr('class');
  alert(classes);
});​

The above code returns the content of the class attribute. How can I get it to return the classes formatted?

For instance, in this case, I want the variable classes to have a value of .example.whatever instead of example whatever.

I've searched and the only solution that seemed to be provided is the code I demonstrated above.

​<button id="test" class="example whatever">Show classes</button>​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​

$('button').click(function(){
  var classes = $(this).attr('class');
  alert(classes);
});​

The above code returns the content of the class attribute. How can I get it to return the classes formatted?

For instance, in this case, I want the variable classes to have a value of .example.whatever instead of example whatever.

I've searched and the only solution that seemed to be provided is the code I demonstrated above.

• javascript
• jquery

Share Improve this question Follow asked Apr 29, 2012 at 3:55 UserIsCorruptUserIsCorrupt 5,0351515 gold badges4040 silver badges4242 bronze badges

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2 Answers 2

Sorted by: Reset to default 6

I'm really very uneasy about this, since replacing spaces with periods will give the representation of stacked classes, when the classes aren't really stacked, but here you go:

// class="foo bar fiz buz" -> .foo.bar.fiz.buz
this.className.replace( /^|\s/g , "." );

Demo: http://jsbin./awitef/edit#javascript,html

$('button').click(function(){
  var classes = $(this).attr('class');
  alert("." + classes.split(" ").join(".") );
});

Fiddle here: http://jsfiddle/wxDEh/3/

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