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javascript - 给 Bootstrap 菜单上色并激活它

转载 作者：行者123 更新时间：2023-11-30 12:13:59 25 4
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我正在尝试使用 bootstrap 构建一个网页，其标题看起来或多或少像 w3schools。为了方便起见，我附上了显示它们的图像文件。 enter image description here

正如您在黄色栏中看到的，我有外观，而且当我突出显示该条目时，它也会变成黑色。但是，如果单击 W3Schools，条目会变为绿色。因此，如果我正在查看 HTML turorial，它会以绿色显示 HTML 菜单条目。如何使用 Bootstrap 实现这一点？

我有这个 HTML:

<!DOCTYPE html>
<html lang="en">
<head>
  <title>Bootstrap Case</title>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <link rel="stylesheet" href="http://maxcdn.bootstrapcdn.com/bootstrap/3.3.5/css/bootstrap.min.css">
  <script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.3/jquery.min.js"></script>
  <script src="http://maxcdn.bootstrapcdn.com/bootstrap/3.3.5/js/bootstrap.min.js"></script>
  <link rel="stylesheet" href="css/custom_styles.css"></script>

</head>
<body>

<nav class="navbar navbar-inverse navbar-static-top"> <!-- PavanD: navbar-static-top helps in removing the rounded navbar.-->
  <div class="container-fluid" style="background-color:#5F5F5F;"> <!--505050 can also be considered -->
    <div class="navbar-header">
      <button type="button" class="navbar-toggle" data-toggle="collapse" data-target="#myNavbar">
        <span class="icon-bar"></span>
        <span class="icon-bar"></span>
        <span class="icon-bar"></span>                        
      </button>
    </div>
    <div id=headerEntries class="collapse navbar-collapse" id="myNavbar">
      <ul class="nav navbar-nav">
        <li><a href="index.html"><span class="glyphicon glyphicon-home"></span></a></li>
        <li><a href="#">CONCEPTS</a></li>
        <li><a href="#">C</a></li>
        <li><a href="#">C++</a></li>
        <li><a href="#">JAVA</a></li>
        <li><a href="#">ORACLE</a></li>
        <li><a href="#">FAQs</a></li>
        <li><a href="#">REACH US</a></li>          
        <li><a href="about.html">ABOUT</a></li>
        </ul>
      <ul class="nav navbar-nav navbar-right">
        <li><a href="#"><span class="glyphicon glyphicon-user"></span>Sign Up</a></li>
        <li><a href="#"><span class="glyphicon glyphicon-log-in"></span>Login</a></li>
      </ul>
    </div>
  </div>
</nav>

</body>
</html>

我想出了这个 CSS。 

.navbar-inverse .navbar-nav > li > a {
    font-family: sans-serif;
  color: #ffffff; /* PavanD: This is the color of the elements when they load. */
}
.navbar-inverse .navbar-nav > li > a:hover, .navbar-inverse .navbar-nav > li > a:focus {
  background-color: #000000; /* PavanD: When you click the top menu items, they have to be rendered in black.*/
    color: #ffffff; /* PavanD: This is the color of the elements when they are clicked. We want it to be white so this.*/
}

.navbar-inverse .navbar-nav > li > a:active {
  background-color: #8AC007; /* PavanD: When you click the top menu items, they have to be rendered in black.*/
    color: #ffffff; /* PavanD: This is the color of the elements when they are clicked. We want it to be white so this.*/
}

但只有在我按下某个按钮后它才会显示绿色。例如，如果我在主页上单击“关于”页面，它会立即显示绿色并恢复为灰色。我是网络编程的新手，我在想这是否是使用 java 脚本 [?] 完成的，但不确定。任何输入都会有很大帮助。

下面好像是w3页面的css。它使用自己的 w3.css。 .topnav a.active { 背景色:#8AC007； 颜色:#FFF；

对于 w3schools 页面，我可以看到我单击的链接的状态将变为事件状态。更具体地说，如果我点击 HTML 类(class)，我可以看到

<div style="overflow:auto;">
<div style="float:left;width:50%;overflow:hidden;height:44px">
<a href="javascript:void(0);" class="topnav-localicons w3-hide-large w3-left" onclick="open_menu()" title="Menu">☰</a>
<a href="/default.asp" class="topnav-icons fa fa-home w3-left" title="Home"></a>
<a href="/html/default.asp" class="**active**" title="HTML Tutorial">HTML</a>
<a href="/css/default.asp" class="w3-hide-small" title="CSS Tutorial">CSS</a>
<a href="/js/default.asp" class="w3-hide-small" title="JavaScript Tutorial">JAVASCRIPT</a>

应该怎么做？这是 javascript 吗？

非常感谢。

帕文。

编辑:一个小小的 jquery 发挥了魔力。 

    <script>     
    $(document).ready(function(){

    var pathname = this.location.pathname;
    if ( pathname.indexOf('about') > -1 ) 
    {
        $( "#about_home" ).addClass("active");
    }
    else if ( pathname.indexOf('concepts_explore') > -1 ) 
    {
        $( "#concepts_home" ).addClass("active");
    }
    else if ( pathname.indexOf('c_explore') > -1 ) 
    {
        $( "#c_home" ).addClass("active");
    }
    else if ( pathname.indexOf('cpp_explore') > -1 ) 
    {
        $( "#cpp_home" ).addClass("active");
    }
    else if ( pathname.indexOf('java') > -1 ) 
    {
        $( "#java_home" ).addClass("active");
    }
    else if ( pathname.indexOf('ds_explore') > -1 ) 
    {
        $( "#ds_home" ).addClass("active");
    }
    else if ( pathname.indexOf('sql_explore') > -1 ) 
    {
        $( "#sql_home" ).addClass("active");
    }
});
    </script>

最佳答案

这是用于事件状态的 CSS:参见工作示例。

.navbar.navbar-inverse .navbar-nav > .active,
.navbar.navbar-inverse .navbar-nav > .active > a,
.navbar.navbar-inverse .navbar-nav > .active > a:hover,
.navbar.navbar-inverse .navbar-nav > .active > a:focus {
  background-color: #8AC007;
  color: #FFF;
}

.navbar.navbar-inverse .navbar-nav > li > a {
  font-family: sans-serif;
  color: #ffffff;
  /* PavanD: This is the color of the elements when they load. */
}
.navbar.navbar-inverse .navbar-nav > li > a:hover,
.navbar.navbar-inverse .navbar-nav > li > a:focus {
  background-color: #000000;
  /* PavanD: When you click the top menu items, they have to be rendered in black.*/
  color: #ffffff;
  /* PavanD: This is the color of the elements when they are clicked. We want it to be white so this.*/
}
.navbar.navbar-inverse .navbar-nav > li > a:active {
  background-color: #8AC007;
  color: #ffffff;
}
/***Link Background and Color Active State***/

.navbar.navbar-inverse .navbar-nav > .active,
.navbar.navbar-inverse .navbar-nav > .active > a,
.navbar.navbar-inverse .navbar-nav > .active > a:hover,
.navbar.navbar-inverse .navbar-nav > .active > a:focus {
  background-color: #8AC007;
  color: #FFF;
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.5/js/bootstrap.min.js"></script>
<link href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.5/css/bootstrap.min.css" rel="stylesheet" />
<nav class="navbar navbar-inverse navbar-static-top">
  <!-- PavanD: navbar-static-top helps in removing the rounded navbar.-->
  <div class="container-fluid" style="background-color:#5F5F5F;">
    <!--505050 can also be considered -->
    <div class="navbar-header">
      <button type="button" class="navbar-toggle" data-toggle="collapse" data-target="#myNavbar"> <span class="icon-bar"></span>
        <span class="icon-bar"></span>
        <span class="icon-bar"></span> 
      </button>
    </div>
    <div id=headerEntries class="collapse navbar-collapse" id="myNavbar">
      <ul class="nav navbar-nav">
        <li class="active"><a href="index.html"><span class="glyphicon glyphicon-home"></span></a>

        </li>
        <li><a href="#">CONCEPTS</a>

        </li>
        <li><a href="#">C</a>

        </li>
        <li><a href="#">C++</a>

        </li>
        <li><a href="#">JAVA</a>

        </li>
        <li><a href="#">ORACLE</a>

        </li>
        <li><a href="#">FAQs</a>

        </li>
        <li><a href="#">REACH US</a>

        </li>
        <li><a href="about.html">ABOUT</a>

        </li>
      </ul>
      <ul class="nav navbar-nav navbar-right">
        <li><a href="#"><span class="glyphicon glyphicon-user"></span>Sign Up</a>

        </li>
        <li><a href="#"><span class="glyphicon glyphicon-log-in"></span>Login</a>

        </li>
      </ul>
    </div>
  </div>
</nav>

关于javascript - 给 Bootstrap 菜单上色并激活它，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/32931863/

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