错误地标记为重复
JS小提琴(问题)
http://jsfiddle.net/xrd2b42L/12/
JS小提琴(有解决方案)
http://jsfiddle.net/xrd2b42L/21/
问题
我有一个由JQuery提供支持的下拉菜单。如果我在菜单中放置了一个选择标签,并尝试选择一个选项,菜单会自动关闭,而我无法选择一个选项。
此错误不是跨浏览器的一致性。此菜单在Firefox 37.01,Safari 5.1.7中正常运行,也可在Chrome 39中使用。
我已尝试将启动菜单的JavaScript事件更改为点击事件,但仍会出现错误。
该错误发生在IE11和Chrome 41.0.2272.118中。
将不胜感激。
更新
我已经更新了使用mouseenter事件的小提琴。问题仍然存在。 Kano指出,当我将鼠标悬停在选择内的选项上时,问题似乎是触发鼠标离开事件。
修正
经过4个小时的努力,我设法解决了这个问题。事实证明,即使select元素是处理程序附加到的元素的子元素,也会在select元素上触发鼠标离开事件。我已修复下面的javascript,以便代码现在可以正常运行,以防其他人遇到此问题。
HTML
<html>
<header>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.2/jquery.min.js"></script>
</header>
<body>
<ul class = 'contentMenu jsGeneralNavigation'>
<li>Menu Item 1</li>
<li>Drop Down Menu 1
<ul>
<li>No Select</li>
<li>
<select>
<option value ='Option 1'>Option 1</option>
<option value ='Option 2'>Option 2</option>
<option value ='Option 3'>Option 3</option>
</select>
<li>No Select</li>
</ul>
</ul>
</body>
</html>
CSS
/******************************************************
* CSS Reset
* http://meyerweb.com/eric/tools/css/reset/
* v2.0 | 20110126
******************************************************/
html, body, div, span, applet, object, iframe,
h1, h2, h3, h4, h5, h6, p, blockquote, pre,
a, abbr, acronym, address, big, cite, code,
del, dfn, em, img, ins, kbd, q, s, samp,
small, strike, strong, sub, sup, tt, var,
b, u, i, center,
dl, dt, dd, ol, ul, li,
fieldset, form, label, legend,
table, caption, tbody, tfoot, thead, tr, th, td,
article, aside, canvas, details, embed,
figure, figcaption, footer, header, hgroup,
menu, nav, output, ruby, section, summary,
time, mark, audio, video {
margin: 0;
padding: 0;
border: 0;
font-size: 100%;
font: inherit;
vertical-align: baseline;
}
/* HTML5 display-role reset for older browsers */
article, aside, details, figcaption, figure,
footer, header, hgroup, menu, nav, section {
display: block;
}
body {
line-height: 1;
}
ol, ul {
list-style: none;
}
blockquote, q {
quotes: none;
}
blockquote:before, blockquote:after,
q:before, q:after {
content: '';
content: none;
}
table {
border-collapse: collapse;
border-spacing: 0;
}
/*************************************************************
* End CSS Reset
*************************************************************/
ul.contentMenu li {
float: left;
position: relative;
list-style: none;
text-align: center;
color: #000;
cursor: default;
display: block;
font-size: 12px;
text-decoration: none;
padding:5px;
border-radius: 3px 3px 0px 0px;
border: 1px #ddd solid;
border-bottom:0px;
background-color: #F0F0F0;
margin-right: 5px;
}
ul.contentMenu li.pesudoClassHover {
background-color: #ddd;
}
ul.contentMenu ul {
z-index: 10;
display: none;
position: absolute;
top: 22px;
left: -1px;
box-shadow: 5px 5px 5px #aaa;
border-top:1px solid #ddd;
border-top-right-radius: 3px;
border-bottom-left-radius: 3px;
border-bottom-right-radius: 3px;
background-color: #fff; /* Important fixes Ie.7. bug where relatively positioned element overlaps absolutely positioned element */
}
/* Keep this seperate and above first child declaration otherwise it breaks I.e. 8 */
ul.contentMenu ul li {
border: none; /* Important - Reset border */
border-radius: 0px; /* Important - Reset border */
padding:5px;
margin: 0px;
float: none;
text-align: left;
text-shadow: none;
background-color: #fff;
border-left:1px solid #ddd;
border-right:1px solid #ddd;
border-bottom:1px solid #ddd;
}
ul.contentMenu ul li a {
display: block;
border: none;
text-decoration: none;
color:#000;
padding:5px;
font-size: 12px;
}
ul.contentMenu li ul li:hover {
background-color: #ddd;
}
ul.contentMenu ul li:last-child {
border-bottom-left-radius: 3px;
border-bottom-right-radius: 3px;
}
ul.contentMenu li ul li a:hover {
background-color: #ddd;
}
JavaScript(使用解决方案)
$(document).ready(function()
{
//Javascript for desktop navigation
$('ul.jsGeneralNavigation > li').on('mouseenter', function()
{
$(this).addClass('pesudoClassHover');
$(this).children('ul').show();
});
//Javascript for desktop navigation
$('ul.jsGeneralNavigation > li').on('mouseleave', function(e)
{
//This is the fix to prevent the select triggering the mouse leave
if(e.target.tagName.toLowerCase() != "select") {
$(this).removeClass('pesudoClassHover');
$(this).children('ul').hide();
}
});
});