简化冗余jQuery代码

Question

我想简化我的jQuery代码以获取页脚弹出/工具提示动画,因为它是冗余的并且不是非常可扩展的.我发现这篇文章:jQuery代码简化但无法弄清楚如何将它应用于我的情况.谢谢!

<div id="footer-wrap">
    <div id="footer">
        <ul>
            <li class="copyright"><a href="#" >copyright</a></li>
            <li class="facebook"><a href="#" target="_blank">facebook</a></li>
            <li class="twitter"><a href="#" target="_blank">twitter</a></li>
            <li class="wordpress"><a href="#" target="_blank">blog</a></li>
        </ul>       
    </div>
    <div class="popup">
        <p class="popup-wordpress"><span class="popup-icon"></span><span class="popup-text">Check Out Our Blog</span></p>
        <p class="popup-twitter"><span class="popup-icon"></span><span class="popup-text">Follow us on Twitter</span></p>
        <p class="popup-facebook"><span class="popup-icon"></span><span class="popup-text">Become a fan on Facebook</span></p>
        <p class="popup-copyright"><span class="popup-text">Copyright &copy; 2011<br />All Rights Reserved</span></p>
    </div>
</div>


$(function() {
   $('.copyright').hover(
    function() {
        $('.popup-copyright').stop().animate({ marginTop: -52 }, 100);
    },
    function() {
        $('.popup-copyright').stop().animate({ marginTop: 0 }, 100);
});
$('.copyright').click(function() {
        return false
    });
$('.facebook').hover(
    function() {
        $('.popup-facebook').stop().animate({ marginTop: -52 }, 100);
    },
    function() {
        $('.popup-facebook').stop().animate({ marginTop: 0 }, 100);
});
$('.twitter').hover(
    function() {
        $('.popup-twitter').stop().animate({ marginTop: -52 }, 100);
    },
    function() {
        $('.popup-twitter').stop().animate({ marginTop: 0 }, 100);
});
$('.wordpress').hover(
    function() {
        $('.popup-wordpress').stop().animate({ marginTop: -52 }, 100);
    },
    function() {
        $('.popup-wordpress').stop().animate({ marginTop: 0 }, 100);
});
    });

Answer 1

如果那些将是悬停元素的唯一类,你可以这样做:

$('.copyright,.facebook,.twitter,.wordpress').hover(
    function() {
        $('.popup-' + this.className).stop().animate({ marginTop: -52 }, 100);
    },
    function() {
        $('.popup-' + this.className).stop().animate({ marginTop: 0 }, 100);
});
$('.copyright').bind('click',false);

或者甚至像这样短一点:

$('.copyright,.facebook,.twitter,.wordpress').hover( function(e) {
    $('.popup-' + this.className).stop().animate({ marginTop: e.type === 'mouseenter' ? -52 : 0 }, 100);
});
$('.copyright').bind('click',false);

请注意,这.bind('click',false);需要jQuery 1.4.3或更高版本.

......或者更好的是,使用delegate()^(docs)方法.

$('#footer').delegate('li','hover' function(e) {
    $('.popup-' + this.className).stop().animate({ marginTop: e.type === 'mouseenter' ? -52 : 0 }, 100);
});
$('.copyright').bind('click',false);