Why is alert($('.myClass').hasClass('myClass')); false?

When the page loads i replace the attributes of a specific object. Then in a few lines under(maybe directly under) i do another check which always seems to fail. So i tried

alert($('.myClass').hasClass('myClass'));

and by all logic shouldnt that always return true? I set a breakpoint in firebug and i can see the object with the new attribute however... why does t开发者_JAVA百科his line fail?

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by all logic shouldnt that always return true?
It will return false if your selector matches no elements. Are you sure that's not the case? You can try this to check:

alert($('.myClass').length);

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How about this?

var myclasses = $('.myClass');

alert(!myclasses.length || myclasses.hasClass('myClass'));