我试图建立一个足球网站，我需要有人来帮助我。我想添加一个下拉菜单，其中列出了足球比赛的专栏。确切地说，在＃34;比赛＆＃34;就像这个drop-down menu that lists columns。
@Mostafa Baezid以下是代码：
Customer name | Billing start date | Billing end date | Usage
ACME Inc | 10/20/2016 | 11/21/2016 | $100,00
Microsoft | 10/20/2016 | 11/21/2016 | <loading...>
答案 0 :(得分：0)
您可以在bootstrap框架中轻松完成此操作。 Demo。这只是一个例子。你可以按照这个。如果您有任何疑问，请在评论中提问我。我会为你解释一下。祝好运。 [N.B：如果您的项目有自定义css文件，请不要在css上使用！important。我在这里使用！important，因为在同一页面覆盖了css。]
/* CSS used here will be applied after bootstrap.css */
@import url(http://fonts.googleapis.com/css?family=Open+Sans:400,700);
body {
font-family: 'Open Sans', 'sans-serif';
background: #f0f0f0;
background: white;
}
nav.navbar-default{
background: #35c353;
}
.navbar-nav>li>.dropdown-menu {
border-top-left-radius: 4px;
border-top-right-radius: 4px;
}
.navbar-default .navbar-nav>li>a {
color:white !important;
font-weight: bold;
}
.navbar-default .navbar-nav>li>a:hover{
color:black !important;
}
.mega-dropdown {
position: static !important;
}
.mega-dropdown-menu {
padding: 20px 0px;
width: 100%;
box-shadow: none;
-webkit-box-shadow: none;
border-color:#35c353;
}
.navbar-default .navbar-nav > .open > a, .navbar-default .navbar-nav > .open > a:focus, .navbar-default .navbar-nav > .open > a:hover {
color: black !important;
background-color:#35c353 !important;
}
.mega-dropdown-menu:before {
content: "";
border-bottom: 15px solid #20ff4f;
border-right: 17px solid transparent;
border-left: 17px solid transparent;
position: absolute;
top: -15px;
left: 550px;
z-index: 10;
}
.mega-dropdown-menu:after {
content: "";
border-bottom: 17px solid #20ff4f;
border-right: 19px solid transparent;
border-left: 19px solid transparent;
position: absolute;
top: -17px;
left: 548px;
z-index: 8;
}
.mega-dropdown-menu > li > ul {
padding: 0;
margin: 0;
}
.mega-dropdown-menu > li > ul > li {
list-style: none;
}
.mega-dropdown-menu > li > ul > li > a {
display: block;
padding: 3px 20px;
clear: both;
font-weight: normal;
line-height: 1.428571429;
color: #999;
white-space: normal;
}
.mega-dropdown-menu > li ul > li > a:hover,
.mega-dropdown-menu > li ul > li > a:focus {
text-decoration: none;
color: #444;
background-color: #f5f5f5;
}
.mega-dropdown-menu .dropdown-header {
color: #428bca;
font-size: 18px;
font-weight: bold;
background:#777;
}
h1.c-text{
text-align:center;}
/*Usefull class*/
.nopadding {
padding-left:0 !important;
padding-right:0 !important;
}
.nomargin{
margin-left:0;
margin-right:0;
}
@media (max-width:947px) and (min-width:769px) {
.navbar-nav {
display: inline-flex;
margin: 0;
}
.mega-dropdown-menu:before {
left: 495px !important;
}
.mega-dropdown-menu:after {
left: 495px !important;
}
}<!DOCTYPE html>
<html>
<head>
<!-- All links cdn's Before Body tag end -->
<link href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css" rel="stylesheet" />
<link href="https://maxcdn.bootstrapcdn.com/font-awesome/4.2.0/css/font-awesome.min.css" type="text/css" rel="stylesheet" />
<head>
<body>
<nav class="navbar navbar-default">
<div class="navbar-header">
<button class="navbar-toggle" type="button" data-toggle="collapse" data-target=".js-navbar-collapse">
<span class="sr-only">Toggle navigation</span>
<span class="icon-bar"></span>
<span class="icon-bar"></span>
<span class="icon-bar"></span>
</button>
<a class="navbar-brand" href="#">LOGO</a>
</div>
<div class="collapse navbar-collapse js-navbar-collapse">
<ul class="nav navbar-nav">
<li><a href="#">Home</a></li>
<li><a href="#">News</a></li>
<li><a href="#">EUROPE</a></li>
<li><a href="#">AFRICA</a></li>
<li><a href="#">WORLDWIDE</a></li>
<li class="dropdown mega-dropdown">
<a href="#" class="dropdown-toggle arrow" data-toggle="dropdown">Competitions <span class="glyphicon glyphicon-chevron-down "></span></a>
<ul class="dropdown-menu mega-dropdown-menu"><!--megaMenu Wih 3 column start-->
<li class="col-sm-4 nopadding">
<ul>
<li class="dropdown-header">France</li>
<li><a href="#">Demo Link</a></li>
<li><a href="#">Demo Link</a></li>
<li><a href="#">Demo Link</a></li>
<li class="divider"></li>
</ul>
</li>
<li class="col-sm-4 nopadding">
<ul>
<li class="dropdown-header">Europe</li>
<li><a href="#">Demo Link</a></li>
<li><a href="#">Demo Link</a></li>
<li><a href="#">Demo Link</a></li>
<li class="divider"></li>
</ul>
</li>
<li class="col-sm-4 nopadding">
<ul>
<li class="dropdown-header">INTERNATIONAL</li>
<li><a href="#">Demo Link</a></li>
<li><a href="#">Demo Link</a></li>
<li><a href="#">Demo Link</a></li>
<li class="divider"></li>
</ul>
</li>
</ul><!--megaMenu Wih 3 column End-->
</li>
<li><a href="#">Live Matches</a></li>
<li><a href="#">Mercato</a></li>
<li><a href="#">Videos</a></li>
</ul>
</div>
<!-- /.nav-collapse -->
</nav><!-- /.nav-End -->
<h1 class="c-text"> Mega Menu Demo </h1>
<!-- All Scripts Before Body tag end -->
<script type="text/javascript" src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.3/jquery.min.js"></script>
<script type="text/javascript" src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.js"></script>
<script type="text/javascript">
$(function () {
$('.arrow').click(function () {
$('.glyphicon-chevron-down').toggle();
});
});
</script>
</body>
@media only screen and (max-width:768px)
{
.navbar-nav{
display: block !important;
z-index: 1000;
position: absolute !important;
width: 100% ;
border: green !important;
background: #35c353 !important;}
}