javascript - 如果鼠标悬停在 DIV 上，则保持显示

Question

我有以下 jQuery 代码(取自此处某处的另一个问题):

$(document).ready(function(){
    $("#profile_dropdown").mouseenter(function(){
        clearTimeout($(this).data('timeoutId'));
        $("#profile_dropdown_content").fadeIn("slow");
    }).mouseleave(function(){
        var someElement = $("#profile_dropdown");
        var timeoutId = setTimeout(function(){
            $("#profile_dropdown_content").fadeOut("slow");
        }, 650);
        //set the timeoutId, allowing us to clear this trigger if the mouse comes back over
        someElement.data('timeoutId', timeoutId); 
    });
});

它按预期工作，但是 - 我无法弄清楚如何在鼠标移到它上面时保持 #profile_dropdown_content 显示。如果鼠标移出，如何让它淡出……

有什么想法吗？

Answer 1

将 #profile_dropdown_content 嵌套在 #profile_dropdown 容器中并使用悬停事件。

jsfiddle:http://jsfiddle.net/UsWYq/1/

JS

$(document).ready(function(){
    $("#profile_dropdown").hover(function(){
        clearTimeout($(this).data('timeoutId'));
        $("#profile_dropdown_content").fadeIn("slow");
    }, function(){
        var someElement = $("#profile_dropdown");
        var timeoutId = setTimeout(function(){
            $("#profile_dropdown_content").fadeOut("slow");
        }, 650);
        //set the timeoutId, allowing us to clear this trigger if the mouse comes back over
        someElement.data('timeoutId', timeoutId); 
    });
});

HTML

<div id="profile_dropdown">
    <div class="inner">Hover Me</div>
    <div id="profile_dropdown_content">Display Me</div>
</div>
<div id="profile_dropdown"></div>

CSS

#profile_dropdown {
    background:whitesmoke;
    float:left;
}
#profile_dropdown .inner {
    height:100px;
    width:100px;
}
#profile_dropdown_content {
    display:none;
    background:red;
    height:100px;
    width:100px;
}

选项 2

您可以做的另一件事是 CSS3 转换:http://jsfiddle.net/Ezxm5/

#profile_dropdown {
    background:whitesmoke;
    float:left;
}
#profile_dropdown:hover #profile_dropdown_content {
    display:block;
    opacity:1;
    height:100px;
}
#profile_dropdown .inner {
    height:100px;
    width:100px;
}
#profile_dropdown_content {
    opacity:0;
    background:red;
    height:0;
    width:100px;
    overflow:hidden;
    -webkit-transition: opacity 0.4s ease-in, height 0.4s ease-out;
    -moz-transition: opacity 0.4s ease-in, height 0.4s ease-out;
    -ms-transition: opacity 0.4s ease-in, height 0.4s ease-out;
    -o-transition: opacity 0.4s ease-in, height 0.4s ease-out;
    transition: opacity 0.4s ease-in, height 0.4s ease-out;
}​
​