查看“Widget:Hover”的源代码

<noinclude> </noinclude><includeonly><!--{if !isset($wgHover) || !$wgHover}--><!--{assign var="wgHover" value=true scope="global"}--><style>
.hover {
    position: relative;
}
.hoverbefore,
.hoverafter {
    position: absolute;
    transition: .37s all linear
}
.hover:hover .hoverbefore,
.hoverafter {
    opacity: 0;
}
.hover:hover .hoverafter {
    opacity: 1;
}</style><script>
window.RLQ = window.RLQ || [];
window.RLQ.push(function(){
    mw.loader.implement("widgetHover",function($, jQuery){
        $('.hover').each(function(){
            var height = 0,
                width = 0;
            $(this).children().each(function(){
                if ($(this).height() > height) height = $(this).height();
                if ($(this).width() > width) width = $(this).width();
            });
            if(!/width\s*:\s*\d+px/.test($(this).attr('style'))) $(this).width(width);
            if(!/height\s*:\s*\d+px/.test($(this).attr('style'))) $(this).height(height);
        });
    });
});</script><!--{/if}--></includeonly>