这两种执行回调（jQuery）的方式之间有区别吗？

Question

I'm just starting to learn jQuery and I've seen this. I don't know if there is any difference or which one would be better.

myDiv.fadeOut('fast', function() {
    myDiv.removeClass('slide');
});

And

myDiv.fadeOut('fast').removeClass('slide');

Answer 1

The callback to .fadeOut call fires when fade out finishes. So this

myDiv.fadeOut('fast', function() {
    myDiv.removeClass('slide');
});

will remove the class at the end of animation while this:

myDiv.fadeOut('fast').removeClass('slide');

removes the class after .fadeOut is initialized, basically at the begining of the animation.

There is no answer to the question "which is better?" because these two are functionally different. That totally depends on what you are trying to achieve.