下拉菜单显示不正确

时间:2016-11-29 00:18:11

标签: html css html5 css3 drop-down-menu

我正在尝试使用html和css为网站制作导航。它非常简单,我唯一想要的是显示下拉菜单并在悬停时为它们着色。

现在我差不多了,但是我还有两个问题:

  1. 元素重叠
  2. 当您悬停子菜单时,有两个“悬停”平方背景 显示。
  3. 我有以下CSS:

    header {
        background-color: rgb(147, 147, 147);
        position: fixed;
        top: 0;
        margin: 0;
        padding: 0;
        left: 0;
        height: 8%;
        width: 100%;
        border-bottom: 0.3em rgb(44, 171, 185) outset;
        box-shadow: 0 0.18em 0.625em rgba(0, 0, 0, 0.50);
    }
    header nav ul {
        list-style-type: none;
        top: 0;
        margin: 0;
    }
    
    .active {
        background-color: rgba(0, 0, 0, 0.35);
    
    }
    
    header nav ul li.active:hover {
        background-color: rgba(48, 67, 91, 0.64);
    }
    
    header nav ul li {
        position: relative;
        display: block;
    }
    
    header nav ul li a {
        display: block;
        line-height: 40px;
        padding: 8px;
        margin: 0;
        top: 0;
        float: left;
        text-decoration: none;
        color: #FFF;
        font-family: Arial, Helvetica, sans-serif;
        background-color: inherit;
    }
    
    header nav ul li:hover:not(.active) {
        background-color: rgba(48, 67, 91, 0.35);
    }
    
    header nav ul li.dropdown ul {
        display: none;
    }
    
    header nav ul li.dropdown:hover ul {
        display: block;
        position: absolute;
    
    }
    
    header nav ul li ul li {
        display: block;
        float: none;
        padding: 30px;
    }
    

    我的html如下:

    <body>
    
    <header>
        <nav>
            <ul>
                <li class="active"><a href="#">Element1</a></li>
                <li><a href="element2/index.html">Element2</a></li>
                <li class="dropdown"><a href="menu/index.html">Menu</a>
                <ul>
                    <li><a href="#submenu1.html">Submenu1</a></li>
                    <li><a href="#submenu2.html">Submenu2</a></li>
                </ul>
            </ul>
        </nav>
    </header>
    
    </body>
    

    我想要的是改变悬停元素的背景并正确显示下拉列表中的子元素。

    我希望我很清楚,谢谢

    您可以在此处查看代码:https://jsfiddle.net/hdd260s4/

2 个答案:

答案 0 :(得分:0)

请尝试此操作并根据您的需要进行更改。

<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8">
<title>Show Hide Dropdown Using CSS</title>
<style type="text/css">
    ul{
        padding: 0;
        list-style: none;
        background: #f2f2f2;
    }
    ul li{
        display: inline-block;
        position: relative;
        line-height: 21px;
        text-align: left;
    }
    ul li a{
        display: block;
        padding: 8px 25px;
        color: #333;
        text-decoration: none;
    }
    ul li a:hover{
        color: #fff;
        background: #939393;
    }
    ul li ul.dropdown{
        min-width: 100%; /* Set width of the dropdown */
        background: #f2f2f2;
        display: none;
        position: absolute;
        z-index: 999;
        left: 0;
    }
    ul li:hover ul.dropdown{
        display: block; /* Display the dropdown */
    }
    ul li ul.dropdown li{
        display: block;
    }
</style>
</head>
<body>
    <ul>
        <li><a href="#">Home</a></li>
        <li><a href="#">About</a></li>
        <li>
            <a href="#">Products &#9662;</a>
            <ul class="dropdown">
                <li><a href="#">Laptops</a></li>
                <li><a href="#">Monitors</a></li>
                <li><a href="#">Printers</a></li>
            </ul>
        </li>
        <li><a href="#">Contact</a></li>
    </ul>
</body>
</html>

我在此处上传了我的代码,请参阅此演示。https://jsfiddle.net/hansraj/z2sojhbm/

答案 1 :(得分:0)

你好,我根据你的要求改变了。请使用此代码。我知道任何查询。

<!DOCTYPE html>
<html>
<head>
<style>
header {
    background-color: rgb(147, 147, 147);
    position: fixed;
    top: 0;
    margin: 0;
    padding: 0;
    left: 0;
    height: 56px;
    width: 100%;
    border-bottom: 0.3em rgb(44, 171, 185) outset;
    box-shadow: 0 0.18em 0.625em rgba(0, 0, 0, 0.50);
}
header nav ul {
    list-style-type: none;
    margin: 0;
    padding: 0;
    overflow: hidden;

}

header nav li {
    float: left;
}
header nav ul li a {
    display: block;
    line-height: 40px;
    padding: 8px;
    text-decoration: none;
    color: #FFF;
    font-family: Arial, Helvetica, sans-serif;
    background-color: inherit;
}
header nav li a, .dropbtn {
    display: inline-block;
    color: white;
    text-align: center;

    text-decoration: none;
}
.active {
background-color: rgba(0, 0, 0, 0.35);
}
header nav ul li.active:hover {
    background-color: rgba(48, 67, 91, 0.64);
}
header nav li a:hover, .dropdown:hover .dropbtn {
     background-color: rgba(48, 67, 91, 0.35);
}

header nav li.dropdown {
    display: inline-block;
}

.dropdown-content {
    display: none;
    position: absolute;
     background-color: rgba(48, 67, 91, 0.35);
    min-width: 160px;
    box-shadow: 0px 8px 16px 0px rgba(0,0,0,0.2);
}

.dropdown-content a {
    color: black;
    padding: 12px 16px;
    text-decoration: none;
    display: block;
    text-align: left;
}

.dropdown-content a:hover {background-color: #f1f1f1}

.dropdown:hover .dropdown-content {
    display: block;
}
</style>
</head>
<body>
<header>
<nav>
<ul>
  <li class="active"><a href="#home">Element1</a></li>
  <li><a href="#news">Element2</a></li>
  <li class="dropdown">
    <a href="#" class="dropbtn">Menu</a>
    <div class="dropdown-content">
      <a href="#">Submenu1</a>
      <a href="#">Submenu2</a>
      <a href="#">Submenu3</a>
    </div>
  </li>
</ul>

</header>
</nav>

</body>
</html>

我在此处上传了我的代码,请参阅此演示。https://jsfiddle.net/hansraj/bmbuLcfk/