jQuery .toggle()显示和隐藏子菜单

//SELEct all the `<li>` element that are children of the `.parent` element
$('.parent').children().click(function(){

    //Now find the `.child` elements that are direct children of the clicked `<li>` and toggle it into or out-of-view
    $(this).children('.child').slideToggle('slow');     
});

演示：http://jsfiddle.net/jasper/z7Zgw/1/

基本上上面的代码使用它来引用点击的< li>因此我们可以找到.child元素,它是被点击的< li>的子元素.元件.

这：$(‘.child’)

更改为：$(this).children(‘.child’)

更新

您也可以停止在嵌套的.child元素上传播click事件,如下所示：

$('.parent').children().click(function(){
    $(this).children('.child').slideToggle('slow');

//SELEct all the `.child` elements and stop the propagation of click events on the elements
}).children('.child').click(function (event) {
    event.stopPropagation();
});

演示：http://jsfiddle.net/jasper/z7Zgw/9/

文档：

> event.stopPropagation()：http://api.jquery.com/event.stopPropagation
> .children()：http://api.jquery.com/children