Jquery 为什么下拉菜单向左对齐?
我正在为a开发一个下拉式导航,并且在下拉部分与父类别对齐时遇到了一些问题-它一直向左移动 以下是html:Jquery 为什么下拉菜单向左对齐?,jquery,css,Jquery,Css,我正在为a开发一个下拉式导航,并且在下拉部分与父类别对齐时遇到了一些问题-它一直向左移动 以下是html: <ul class="dropdown"> <li><a href="#" id="home">Home</a></li> <li><a href="#" id="about">About Us</a> <ul class="sub-menu"> &l
<ul class="dropdown">
<li><a href="#" id="home">Home</a></li>
<li><a href="#" id="about">About Us</a>
<ul class="sub-menu">
<li><a href="#">Our History</a></li>
<li><a href="#">Our Process</a></li>
<li><a href="#">Portfolio</a></li>
<li><a href="#">Financing</a></li>
<li><a href="#">Testimonials</a></li>
<li><a href="#">Subcontractors</a></li>
</ul>
</li>
<li><a href="#" id="personal">Personal Banking</a></li>
<li><a href="#" id="commercial">Commercial Banking</a></li>
<li><a href="#" id="service">Customer Service</a>
<ul class="sub-menu">
<li><a href="#">Our History</a></li>
<li><a href="#">Our Process</a></li>
<li><a href="#">Portfolio</a></li>
<li><a href="#">Financing</a></li>
<li><a href="#">Testimonials</a></li>
<li><a href="#">Subcontractors</a></li>
</ul>
</li>
<li><a href="#" id="investors">Investor Relations</a></li>
<li><a href="#" id="contact">Contact Us</a></li>
</ul>
我尝试将ul.dropdown ul更改为相对位置,但这破坏了导航。如果能帮我纠正这个问题,我将不胜感激
谢谢。1)使用display:block而不是visibility:hidden
-将jquery更改为使用.show()/.hide()而不是编辑可见性属性
2) 使您的ul.dropdown ul css看起来像:
ul.dropdown ul {
display: none;
padding-left: 0;
margin-left: 0;
width: 200px;
position: absolute;
}
如果您使用jQuery,您应该查看,因为这将满足您的需要。我在其他方面使用了一个修改过的版本,但如果我提取一个小摘录并将其应用到您的HTML中,我会得到以下结果
<script type="text/javascript">
$(function() {
$("ul.dropdown li").hover(function() {
$(this).addClass("hover");
$('ul:first', this).show();
$(this).parents('li a').addClass('hover');
}, function() {
$(this).removeClass("hover");
$('ul:first', this).hide();
$(this).parents('li a').removeClass('hover');
});
$("ul.dropdown li ul li:has(ul)").find("a:first").append(" » ");
});
</script>
<style type="text/css">
/* CSS RESET ****************** v1.0 | 20080212 *****************************/
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, font, 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 { margin: 0; padding: 0; border: 0; outline: 0; font-size: 100%; vertical-align: baseline; background: transparent; }
body { line-height: 1; }
ol, ul { list-style: none; }
blockquote, q { quotes: none; }
blockquote:before, blockquote:after, q:before, q:after { content: ''; content: none; }
/* remember to define focus styles! */
:focus { outline: 0; }
/* remember to highlight inserts somehow! */
ins { text-decoration: none; }
del { text-decoration: line-through; }
/* tables still need 'cellspacing="0"' in the markup */
table { border-collapse: collapse; border-spacing: 0; }
.dropdown, .dropdown * { margin: 0; padding: 0; list-style: none; }
.dropdown { line-height: 1.0; }
.dropdown ul { position: absolute; width: 10em; /* left offset of submenus need to match (see below) */ }
.dropdown ul li { width: 100%; }
.dropdown li:hover { visibility: inherit; /* fixes IE7 'sticky bug' */ }
.dropdown li { float: left; position: relative; left: -1px; top: -1px; margin-left: 2px; margin-right: 2px; }
.dropdown a { display: block; position: relative; }
.dropdown span.dropdown-nolink { display: block; position: relative; }
.dropdown li:hover ul, .dropdown li.sfHover ul { left: 0; top: 2.5em; /* match top ul list item height */ z-index: 9999; }
ul.dropdown li:hover li ul, ul.dropdown li.sfHover li ul { top: -999em; }
ul.dropdown li li:hover ul, ul.dropdown li li.sfHover ul { left: 0em; /* match ul width */ top: 0; }
ul.dropdown li li:hover li ul, ul.dropdown li li.sfHover li ul { top: -999em; }
ul.dropdown li li li:hover ul, ul.dropdown li li li.sfHover ul { left: 0em; /* match ul width */ top: 0; }
.dropdown { float: left; margin-bottom: 0em; }
.dropdown a { padding: .70em 1em; text-decoration: none; }
.dropdown a, .dropdown a:visited { /* visited pseudo selector so IE6 applies text colour*/ color: #FFF; }
.dropdown span.dropdown-nolink { padding: .70em 1em; text-decoration: none; }
.dropdown span.dropdown-nolink, .dropdown span.dropdown-nolink:visited { /* visited pseudo selector so IE6 applies text colour*/ color: #FFF; }
.dropdown li { background: #4e8997; text-align: left; }
.dropdown li li { background: #4e8997; ;margin:0;top:-1px;left:-1px;}
.dropdown li li li { background: rgb(188,0,47); margin: 0; top: -1px; left: 0; }
.dropdown li:hover, .dropdown li.sfHover, .dropdown a:focus, .dropdown a:hover, .dropdown a:active { background: #c29c5d; outline: 0; z-index: 9999; }
.sub-menu { display: none; }
</style>
$(函数(){
$(“ul.dropdownli”).hover(函数(){
$(此).addClass(“悬停”);
$('ul:first',this.show();
$(this).parents('li a').addClass('hover');
},函数(){
$(this.removeClass(“hover”);
$('ul:first',this.hide();
$(this).parents('li a').removeClass('hover');
});
$(“ul.dropdownlli:has(ul)”).find(“a:first”).append(“»;”);
});
/*CSS重置******************v1.0|20080212*****************************/
html,body,div,span,applet,object,iframe,h1,h2,h3,h4,h5,h6,p,blockquote,pre,a,abbr,缩写词,地址,big,cite,code,del,dfn,em,font,img,ins,kbd,q,s,samp,small,strike,strong,sub,sup,tt,var,b,u,i,center,dl,dt,dd,dd,ol,ul,li,fieldset,form,label,label,图例,table,table,table,caption,tbody,tfoot,thead,tr,th,th,td{边距:0;填充:0;边框:0;轮廓:0;字体大小:100%;垂直对齐:基线;背景:透明;}
正文{行高:1;}
ol,ul{列表样式:无;}
blockquote,q{quotes:none;}
blockquote:before,blockquote:after,q:before,q:after{content:'';content:none;}
/*记住定义焦点样式*/
:焦点{大纲:0;}
/*记住以某种方式突出显示插入内容*/
ins{文本装饰:无;}
del{text装饰:线穿过;}
/*表仍然需要在标记中使用“cellspacing=”0“*/
表{边框折叠:折叠;边框间距:0;}
.dropdown.dropdown*{边距:0;填充:0;列表样式:无;}
.下拉列表{行高:1.0;}
.dropdown ul{位置:绝对;宽度:10em;/*子菜单的左偏移需要匹配(见下文)*/}
.下拉列表ul li{宽度:100%;}
.dropdown li:hover{visibility:inherit;/*修复了IE7的“粘性bug”*/}
.dropdown li{float:left;position:relative;left:-1px;top:-1px;margin left:2px;margin right:2px;}
.下拉{显示:块;位置:相对;}
.dropdown span.dropdown-nolink{显示:块;位置:相对;}
.dropdown li:hover ul,.dropdown li.sfHover ul{left:0;top:2.5em;/*匹配顶级ul列表项高度*/z-index:9999;}
ul.dropdownli:hover li ul,ul.dropdownli.sfHover li ul{top:-999em;}
ul.dropdown li li li:hover ul,ul.dropdown li li.sfHover ul{left:0em;/*匹配ul-width*/top:0;}
ul.dropdownli li li:hover li ul,ul.dropdownli li.sfHover li ul{top:-999em;}
ul.dropdown li li:悬停ul,ul.dropdown li.sfHover ul{左:0em;/*匹配ul宽度*/顶:0;}
.dropdown{float:左;边距底部:0em;}
.dropdown a{填充:.70em 1em;文本装饰:无;}
.dropdown a.dropdown a:visited{/*visited伪选择器,因此IE6应用文本颜色*/color:#FFF;}
.dropdown span.dropdown-nolink{padding:.70em 1em;文本装饰:无;}
.dropdown span.dropdown-nolink,.dropdown span.dropdown-nolink:visited{/*visited伪选择器,因此IE6应用文本颜色*/颜色:35;FFF;}
.下拉列表li{背景:#4e8997;文本对齐:左;}
.下拉列表li{背景:#4e8997;;边距:0;顶部:-1px;左侧:-1px;}
.下拉列表li{背景:rgb(188,0,47);边距:0;顶部:-1px;左侧:0;}
.dropdown li:hover、.dropdown li.sfHover、.dropdown a:focus、.dropdown a:hover、.dropdown a:active{background:#c29c5d;outline:0;z-index:9999;}
.子菜单{显示:无;}
我发布了JS,因为我还将其更改为使用jQuery的show()/hide()。感谢您为此付出的额外努力!
<script type="text/javascript">
$(function() {
$("ul.dropdown li").hover(function() {
$(this).addClass("hover");
$('ul:first', this).show();
$(this).parents('li a').addClass('hover');
}, function() {
$(this).removeClass("hover");
$('ul:first', this).hide();
$(this).parents('li a').removeClass('hover');
});
$("ul.dropdown li ul li:has(ul)").find("a:first").append(" » ");
});
</script>
<style type="text/css">
/* CSS RESET ****************** v1.0 | 20080212 *****************************/
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, font, 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 { margin: 0; padding: 0; border: 0; outline: 0; font-size: 100%; vertical-align: baseline; background: transparent; }
body { line-height: 1; }
ol, ul { list-style: none; }
blockquote, q { quotes: none; }
blockquote:before, blockquote:after, q:before, q:after { content: ''; content: none; }
/* remember to define focus styles! */
:focus { outline: 0; }
/* remember to highlight inserts somehow! */
ins { text-decoration: none; }
del { text-decoration: line-through; }
/* tables still need 'cellspacing="0"' in the markup */
table { border-collapse: collapse; border-spacing: 0; }
.dropdown, .dropdown * { margin: 0; padding: 0; list-style: none; }
.dropdown { line-height: 1.0; }
.dropdown ul { position: absolute; width: 10em; /* left offset of submenus need to match (see below) */ }
.dropdown ul li { width: 100%; }
.dropdown li:hover { visibility: inherit; /* fixes IE7 'sticky bug' */ }
.dropdown li { float: left; position: relative; left: -1px; top: -1px; margin-left: 2px; margin-right: 2px; }
.dropdown a { display: block; position: relative; }
.dropdown span.dropdown-nolink { display: block; position: relative; }
.dropdown li:hover ul, .dropdown li.sfHover ul { left: 0; top: 2.5em; /* match top ul list item height */ z-index: 9999; }
ul.dropdown li:hover li ul, ul.dropdown li.sfHover li ul { top: -999em; }
ul.dropdown li li:hover ul, ul.dropdown li li.sfHover ul { left: 0em; /* match ul width */ top: 0; }
ul.dropdown li li:hover li ul, ul.dropdown li li.sfHover li ul { top: -999em; }
ul.dropdown li li li:hover ul, ul.dropdown li li li.sfHover ul { left: 0em; /* match ul width */ top: 0; }
.dropdown { float: left; margin-bottom: 0em; }
.dropdown a { padding: .70em 1em; text-decoration: none; }
.dropdown a, .dropdown a:visited { /* visited pseudo selector so IE6 applies text colour*/ color: #FFF; }
.dropdown span.dropdown-nolink { padding: .70em 1em; text-decoration: none; }
.dropdown span.dropdown-nolink, .dropdown span.dropdown-nolink:visited { /* visited pseudo selector so IE6 applies text colour*/ color: #FFF; }
.dropdown li { background: #4e8997; text-align: left; }
.dropdown li li { background: #4e8997; ;margin:0;top:-1px;left:-1px;}
.dropdown li li li { background: rgb(188,0,47); margin: 0; top: -1px; left: 0; }
.dropdown li:hover, .dropdown li.sfHover, .dropdown a:focus, .dropdown a:hover, .dropdown a:active { background: #c29c5d; outline: 0; z-index: 9999; }
.sub-menu { display: none; }
</style>