JQuery removeClass duration not working?

Question

I have a paragraph set with the following style:

.design_info_box p.design_info_desc
{
    height:30px;
    text-overflow: ellipsis;
    overflow:hidden;
}

At the same time, you can see the first 2 lines of text using the "read more" button, which extends the paragraph to show the rest of the text.

Here is the button code:

$(".read-more div").click(function(){
    $(this).parent().parent().children("p").removeClass("design_info_desc", "slow");
    $(this).hide();
});

This removes the class and the entire paragraph expands. However, it does not revive. According to the docs, removeClass should have an animation duration. I also tried replacing "slow" with a number like 10000.

Is there a reason why she does not revive?

Answer 1

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- : http://jsfiddle.net/YaSh6/