Question

我正在尝试用Jquery制作水平手风琴。它似乎在Firefox中工作“正常”。但是在Webkit（Safari 3 + 4和Chrome）中，子级UL在Hide功能之后闪烁。任何帮助将不胜感激。要查看有效的演示：http://ableobject.com/horaccordion1.html

以下是我正在做的事情：

<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
<head>
    <meta http-equiv="Content-Type" content="text/html; charset=utf-8"/>
    <script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.3/jquery.min.js"></script>

    <title>untitled</title>
    <style type="text/css">
    #container {
        display: table; 
        margin: 0 auto; 
        text-align: center; /* for IE */
    }
            ul{
                    list-style: none;
                    background-color: yellow;
                    margin: 0;
                    padding: 0;
                    float: left;
                    height: 20px; /* For testing */     
            }
            ul li {
                   background-color: aqua;
                    float: left;
            }
            ul li ul {
                   background-color: blue;
                    display: none;
            }
            ul li ul li {
                   background-color: green;
            }
            a, a:link, a:hover, a:visited, a:active {
                    color: black;
                    text-decoration: none;
                    float: left;
            }
    </style>

   <script type="text/javascript">
/* Care of Hunter Daley */
    var $current = null;
        $(document).ready(function(){
         $("ul li ul").hide();  // hide submenus by default on load

           $("ul li a").click(function(){
              var $sub = $(this).next(); 
              if ($sub.css("display") == "none")
              {
                 if ($current != null)
                    $current.animate({ width: 'hide' }); // if you want to only show one sub at a time
                 $sub.animate({ width: 'show' }); 
                 $current = $sub;
              }
              else
              {
                 $sub.animate({ width: 'hide' });
                 $current = null;
              }
           });
        });
    </script>
</head>

<body>
    <div id="container">
    <ul>
            <li>
                    <a href="#">Top-level 1</a>
            </li>
            <li>
                    <a href="#">Top-level 2</a>

                    <ul>
                            <li><a href="#">Bottom Level A1</a></li>
                            <li><a href="#">Bottom Level A2</a></li>
                            <li><a href="#">Bottom Level A3</a></li>
                            <li><a href="#">Bottom Level A4</a></li>
                    </ul>
            </li>

            <li>
                    <a href="#">Top-level 3</a>
                    <ul>
                            <li><a href="#">Bottom Level B1</a></li>
                            <li><a href="#">Bottom Level B2</a></li>
                    </ul>
            </li>

            <li>
                    <a href="#">Top-level 4</a>
            </li>
    </ul>
</div>
</body>

Answer 1

这听起来像是与我之前使用webkit的问题有关。有一个webkit错误有时会导致元素的父级在减少元素宽度的动画之后恢复到其原始大小。在动画之后，元素的父级跳回到其原始大小以容纳其内容。

编辑：删除了有关jQueryUI的评论。不知道为什么我以为你在使用它。

讨论了这个错误here，详细介绍了解决方法。

我也向jQuery提交了bug report。

基本上，您需要同时将$sub元素父级的宽度减少与减少$sub相同的量。因此，如果$sub的宽度为100px，则会有一个单独的animate()将父级减少100px。

我没有用你的例子测试过这个，但我认为这可能是关键。

编辑2： 使用div的新版本

<强> CSS：

.title {
       list-style: none;
       margin: 0;
       padding: 0;
       float: left;
       height: 32px; /* For testing */
       font-family: helvetica;
       font-size: 18px;
       clip: auto; overflow: hidden;
}
.menu {
       height: 32px; /* For testing */
       clip: auto; overflow: hidden;
       float: left;
}
a, a:link, a:hover, a:visited, a:active {
       color: black;
       text-decoration: none;
       padding: 12px;
       font-weight: 700;
       float: left;
       color: #222;
}

 .menu a, .menu a:link, .menu a:hover, .menu a:visited, .menu a:active {
   color: black;
   text-decoration: none;
   padding: 12px;
   font-weight: normal;
   float: left;

}

<强>的javascript：

    // Prevents us from having to check for null.
    var $current = $('#someFictionalElement');
    var $previous = null;
    $(document).ready(function(){
    $(".menu").css({width: 0});  // hide submenus by default on load

    $(".title").click(
        function() {
            $previous = $current;
            $current = $(this);
            var $currentMenu = $current.next();

            $previous.next().animate({ width: 0 }, {duration: 1000, queue: false} );

    // Make sure that if there's no menu text (like Top Level 1 and 4) that it does not animate.
    // This is because of the pixels added for Firefox (see comment below)
            if( $currentMenu.width() == 0 && $currentMenu.text() != ''  ) {

    // Expand the menu but keep it hidden so we can get its width
                $currentMenu.css({visibility: 'hidden', width: ''});

    // Store the width, and add a few pixels for Firefox
                var currentWidth = $currentMenu.width() + 3;

    // Make menu visible and set with to 0 in preparation for the animation
                $currentMenu.css({visibility: 'visible', width: 0})
                            .animate({ width: currentWidth }, 1000);
            }
    });

    $(".title a").hover(
        function(){$(this).animate ({ opacity: 0.7 }, 200);},
        function(){$(this).animate ({ opacity: 1 }, 600);}
    );
});

<强> HTML：

<body>
    <div id="container">
        <div class='title' id='level1'>
            <a href="#">Top-level 1</a>
        </div>
        <div class='menu'></div>
        <div class='title' id='level2'>
            <a href="#">Top-level 2</a>
        </div>
        <div class='menu'>                         
            <a href="#">Bottom Level A1</a>
            <a href="#">Bottom Level A2</a>
            <a href="#">Bottom Level A3</a>
            <a href="#">Bottom Level A4</a>
        </div>
        <div class='title' id='level3'>
            <a href="#">Top-level 3</a>
        </div>
        <div class='menu'>
            <a href="#">Bottom Level B1</a>
            <a href="#">Bottom Level B2</a>
        </div>
        <div class='title' id='level4'>
            <a href="#">Top-level 4</a>
        </div>      
        <div class='menu'></div>
    </div>
</body>

Answer 2

我将此作为单独的答案发布，以防你仍然发现前一个有用。

请注意以下事项：

我没有在ie。
这可以追溯到'嵌套'版本，所以我稍微更改了类和变量名称。
当没有要显示的菜单时，不再需要空菜单。
每个菜单的“容器”的宽度现在减少了与菜单相同的数量。这就是消除webkit的临时闪存（这是最初的策略）的原因。
您会注意到菜单动画的时间与菜单容器的动画时间略有不同。基本上，您希望容器在扩展时稍微提前一点，并且菜单在减少时要稍微提前一点。如果时间设置相等，则可以使菜单闪烁一些。
如评论中所述，在开始时，每个菜单通过设置先前不存在的名为“fullWidth”的属性，在完全展开时“记住”其宽度。然后，它会在需要时检索此属性的值。您可以轻松地使用全局变量或jQuery的data（）函数来存储信息。重点在于，如果每个菜单都知道扩展时应该有多宽，那么事情就会简化。

所以在这里。希望它有所帮助！

<强> CSS

#container {
    margin: 0 auto 0 auto; 
    text-align: center;
    display: table;
}

.menuContainer {
       margin: 0;
       padding: 0;
       float: left;
       height: 32px; /* For testing */
       font-family: helvetica;
       font-size: 18px;
       clip: auto; overflow: hidden;
}
.menu {
       height: 32px; /* For testing */
       clip: auto; overflow: hidden;
       float: left;
}
a, a:link, a:hover, a:visited, a:active {
       color: black;
       text-decoration: none;
       padding: 12px;
       font-weight: 700;
       float: left;
       color: #222;
}

.menu a, .menu a:link, .menu a:hover, .menu a:visited, .menu a:active {
   color: black;
   text-decoration: none;
   padding: 12px;
   font-weight: normal;
   float: left;
}

<强>的javascript

var $currentMenuContainer = $('#someFictionalElement');
var $previousMenuContainer = null;

$(document).ready(function() {

// Iterate through each .menu element, setting the full width of each menu to a 'custom'
//        attribute called 'fullWidth'. Since the full width should never change, this
//        makes it easy to recall it quickly. You could use global variables instead.
// After setting 'fullWidth', it then collapses each menu and title.
$(".menu").each(function() {
    var $theMenu = $(this);
    var $theMenuContainer = $theMenu.parent();
    $theMenu.attr({fullWidth: ($theMenu.width() + 3)});   // Add a few pixels for firefox
    var menuContainerWidth = $theMenuContainer.width() - $theMenu.attr('fullWidth') + 6;  // Add DOUBLE the pixels here
    $theMenu.css({width: 0});
    $theMenuContainer.css({width: menuContainerWidth});
});

    $(".menuContainer a").click(
        function() {
// Set the current and previous elements properly
            $previousMenuContainer = $currentMenuContainer;
            $currentMenuContainer = $(this).parent();
            var $previousMenu = $previousMenuContainer.find('.menu');
            var $currentMenu = $currentMenuContainer.find('.menu');

// Collapse the previous menu
            $previousMenu.animate({ width: 0 }, {duration: 480, queue: false} );

// Subtract the width of the previous menuContainer's menu from the menuContainer (only if its menu is displayed)
            if($previousMenu.width() > 0) $previousMenuContainer.animate({width: ('-=' + $previousMenu.attr('fullWidth'))}, 500);

// Expand the current menu and its menuContainer if it's not showing
            if($currentMenu.width() == 0) {
                // Increase the menuContainer width by the full width of its menu
                $currentMenuContainer.animate({width: ('+=' + $currentMenu.attr('fullWidth'))}, 480);
                // Increase the menuContainer to its full width
                $currentMenu.animate({ width: $currentMenu.attr('fullWidth') }, 500);
            }
    });

    $(".menuContainer a").hover(
        function(){$(this).animate ({ opacity: 0.7 }, 200);},
        function(){$(this).animate ({ opacity: 1 }, 600);}
    );
});

<强> HTML

<div id="container">
    <div class='menuContainer'>
        <a href="#">Top-level 1</a>
    </div>
    <div class='menuContainer'>
        <a href="#">Top-level 2</a>
        <div class='menu'>                         
            <a href="#">Bottom Level A1</a>
            <a href="#">Bottom Level A2</a>
            <a href="#">Bottom Level A3</a>
            <a href="#">Bottom Level A4</a>
        </div>
    </div>
    <div class='menuContainer'>
        <a href="#">Top-level 3</a>
        <div class='menu'>
            <a href="#">Bottom Level B1</a>
            <a href="#">Bottom Level B2</a>
        </div>
    </div>
    <div class='menuContainer'>
        <a href="#">Top-level 4</a>
    </div>
</div>

修改：将以下DTD添加到页面顶部 -

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"
"http://www.w3.org/TR/html4/strict.dtd">

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