jQuery委托优化

Question

优化以下使用委托（）的片段的最佳方式是什么？

jQuery('.menu').delegate('li.gallery', 'hover', function() { jQuery(this).children('.submenu').toggleClass('hide show'); }); 
jQuery('.menu').delegate('li.interior', 'hover', function() { jQuery(this).children('.submenu').toggleClass('hide show'); }); 
jQuery('.menu').delegate('li.exterior', 'hover', function() { jQuery(this).children('.submenu').toggleClass('hide show'); }); 


<li class="gallery"> 
        <span>gallery</span> 
        <ul class="submenu hide"> 
         <li class="interior"> 
          <a href="/gallery/interior">Interior</a> 
          <ul class="submenu hide"> 
           <li><a href="/gallery/interior?gallery=master-bedroom">Master Bedroom</a></li> 
           <li><a href="/gallery/interior?gallery=living-room">Living Room</a></li> 
           <li><a href="/gallery/interior?gallery=dining-room">Dining Room</a></li> 
           <li><a href="/gallery/interior?gallery=kitchen">Kitchen</a></li> 
           <li><a href="/gallery/interior?gallery=bathroom">Bathroom</a></li> 
           <li><a href="/gallery/interior?gallery=foyer">Foyer</a></li> 
           <li><a href="/gallery/interior?gallery=study">Study</a></li> 
           <li><a href="/gallery/interior?gallery=sunroom">Sunroom</a></li>         
           <li><a href="/gallery/interior?gallery=guest-room">Guest Room</a></li>                
          </ul> 
         </li> 
         <li class="exterior"> 
          <a href="/gallery/exterior">Exterior</a> 
          <ul class="submenu hide"> 
           <li><a href="/gallery/exterior?gallery=landscapes">Landscape</a></li> 
           <li><a href="/gallery/exterior?gallery=gardens">Gardens</a></li> 
           <li><a href="/gallery/exterior?gallery=cottages">Cottages</a></li> 
           <li><a href="/gallery/exterior?gallery=entry-driveway">Entry/Driveway</a></li>                        
          </ul> 
         </li>      
        </ul> 
       </li> 

Answer 1

您可以在.delegate()选择参数使用multiple selector (,)。

然而，由于what I would consider a bug in how .delegate() works（关mouseover/mouseout，进入一个孩子时触发），我会避开它，它现在和直接绑定，就像这样：

jQuery('.menu').find('li.gallery, li.interior, li.exterior').hover(function() { 
    jQuery(this).children('.submenu').toggleClass('hide show'); 
});