具有两种不同颜色状态的导航栏

Question

我正在尝试制作一个导航栏，其中一个类别的颜色（蓝色）与其他类别（绿色）不同。当您将鼠标悬停在此蓝色 HOME 类别之外时，它需要变为绿色。悬停的类别应变为蓝色，然后在未悬停时返回绿色。以下是一些图片供参考：

默认/主页状态：用户从主页开始。 Home 类别是蓝色的，以向用户显示他们所在的位置。

雇主状态：用户已导航到雇主页面。 Home 类别现在是绿色的。

我在 SFMC 工作，所以我必须在一个集合中包含所有 HTML、CSS 和 Javascript。这是我的代码：

function myFunction() {
  var x = document.getElementById("myTopnav");
  if (x.className === "topnav") {
    x.className += " responsive";
  } else {
    x.className = "topnav";
  }
}

.body {
  margin: 0;
  font-family: Arial, Helvetica, sans-serif;
}

.topnav {
  overflow: hidden;
  background-color: #47a23f;
}

.topnav a {
  float: left;
  font-size: 16px;
  color: white;
  text-align: center;
  padding: 14px 16px;
  text-decoration: none;
}

.dropdown .dropbtn {
  font-size: 16px;
  border: none;
  outline: none;
  color: white;
  padding: 14px 16px;
  background-color: inherit;
  font-family: inherit;
  margin: 0;
}

.dropdown {
  float: left;
  overflow: hidden;
}

.dropdown .dropbtn {
  font-size: 16px;
  border: none;
  outline: none;
  color: white;
  padding: 14px 16px;
  background-color: inherit;
  font-family: inherit;
  margin: 0;
}

.topnav a:hover,
.dropdown:hover .dropbtn {
  background-color: #005da6;
}

.topnav a.active {
  background-color: #005da6;
  color: white;
}

.topnav .icon {
  display: none;
}

.dropdown-content {
  display: none;
  position: absolute;
  background-color: #47a23f;
  min-width: 160px;
  box-shadow: 0px 8px 16px 0px rgba(0, 0, 0, 0.2);
  z-index: 1;
}

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

.dropdown-content a:hover {
  background-color: #003150;
  color: #fff;
}

.dropdown:hover .dropdown-content {
  display: block;
  color: #fff;
}

@media screen and (max-width: 600px) {
  .topnav a:not(:first-child) {
    display: none;
  }
  .topnav a.icon {
    float: right;
    display: block;
  }
}

@media screen and (max-width: 600px) {
  .topnav.responsive {
    position: relative;
  }
  .topnav.responsive .icon {
    position: absolute;
    right: 0;
    top: 0;
  }
  .topnav.responsive a {
    float: none;
    display: block;
    text-align: left;
  }
}

<meta name="viewport" content="width=device-width, initial-scale=1">
<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/4.7.0/css/font-awesome.min.css">

<div class="topnav" id="myTopnav">
  <a href="#home" class="active">Home</a>
  <div class="dropdown">
    <button class="dropbtn">Workforce 
      <i class="fa fa-caret-down"></i>
    </button>
    <div class="dropdown-content">
      <a target="blank" href="https://myactivehealth.com/Portal/PreRegistrations/Index">Request to enroll</a>
      <a target="blank" href="https://www.myactivehealth.com/Portal/Registration/RegistrationStep1?IsoAuthDPRequest=False">Create an account</a>
      <a target="blank" href="https://www.myactivehealth.com/Portal/PortalLogin.aspx?SupplierURL=15571">Log in</a>
    </div>
  </div>
  <a href="#contact">Employer</a>
  <div class="dropdown">
    <button class="dropbtn">Injured Workers 
      <i class="fa fa-caret-down"></i>
    </button>
    <div class="dropdown-content">
      <a target="blank" href="https://www.myactivehealth.com/Portal/Registration/RegistrationStep1?IsoAuthDPRequest=False">Create an account</a>
      <a target="blank" href="https://www.myactivehealth.com/Portal/PortalLogin.aspx?SupplierURL=15571">Log in</a>
    </div>
  </div>
  <a href="javascript:void(0);" class="icon" onclick="myFunction()">
    <i class="fa fa-bars"></i>
  </a>
</div>

Answer 1

如果您想要使active 元素在悬停在其他元素上时恢复正常颜色，您只需在 CSS 底部添加：

.topnav > .active {
  background-color: #005da6;
}

.topnav:hover > .active {
  background-color: inherit;
}

.topnav > .active:hover {
  background-color: #005da6;
}

.dropdown-content > .active {
  background-color: #003150;
}

.dropdown-content:hover > .active {
  background-color: inherit;
}

.dropdown-content > .active:hover {
  background-color: #003150;
}

如果您只是想了解active 元素处理的一些想法，请查看以下简化的 sn-p：

（注意：下面的导航栏适用于纯 HTML 和 CSS（无 JS）。JS 仅用于在浏览器 URL 更改时自动更改活动元素。）

// * THIS IS ONLY A DEMONSTRATIVE EXAMPLE *

const links = Array.from(document.querySelectorAll('.topnav a'));

const addActive = (elem) => {
  let current = elem;
  
  while (current && !current.classList.contains('topnav')) {
    if (current.classList.contains('dropdown')) {
      current.classList.add('active');
      break;
    }
    current = current.parentElement;
  }
  
  elem.classList.add('active');
};

const handler = (e) => {
  const previousA = document.querySelector('.topnav .active');
  const previousB = document.querySelector('.dropdown-content .active');
  
  if (previousA) {
    previousA.classList.remove('active');
  }
  
  if (previousB) {
    previousB.classList.remove('active');
  }
  
  const next = links.find((link) => location.href === link.href) || links[0];
  
  if (next) {
    addActive(next);
  }
};

window.addEventListener('popstate', handler);
document.addEventListener('DOMContentLoaded', handler);

.body {
  margin: 0;
  font-family: Arial, Helvetica, sans-serif;
}

.topnav {
  overflow: hidden;
  background-color: #47a23f;
}

.topnav a {
  float: left;
  font-size: 16px;
  color: #ffffff;
  text-align: center;
  padding: 14px 16px;
  text-decoration: none;
}

.dropdown {
  float: left;
  overflow: hidden;
}

.dropdown .dropbtn {
  font-size: 16px;
  border: none;
  outline: none;
  color: #ffffff;
  padding: 14px 16px;
  background-color: inherit;
  font-family: inherit;
  margin: 0;
}

.dropdown .dropbtn {
  font-size: 16px;
  border: none;
  outline: none;
  color: #ffffff;
  padding: 14px 16px;
  background-color: inherit;
  font-family: inherit;
  margin: 0;
}

.topnav a:hover,
.dropdown:hover .dropbtn {
  background-color: #005da6;
}

.topnav .icon {
  display: none;
}

.dropdown-content {
  display: none;
  position: absolute;
  background-color: #47a23f;
  min-width: 160px;
  box-shadow: 0px 8px 16px 0px rgba(0, 0, 0, 0.2);
  z-index: 1;
}

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

.dropdown-content a:hover {
  background-color: #003150;
  color: #ffffff;
}

.dropdown:hover .dropdown-content {
  display: block;
  color: #ffffff;
}

.topnav > .active {
  background-color: #005da6;
}

.topnav:hover > .active {
  background-color: inherit;
}

.topnav > .active:hover {
  background-color: #005da6;
}

.dropdown-content > .active {
  background-color: #003150;
}

.dropdown-content:hover > .active {
  background-color: inherit;
}

.dropdown-content > .active:hover {
  background-color: #003150;
}

<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/4.7.0/css/font-awesome.min.css">

<div class="topnav">
  <a href="#home">Home</a>
  
  <div class="dropdown">
    <button class="dropbtn">Workforce 
      <i class="fa fa-caret-down"></i>
    </button>
    <div class="dropdown-content">
      <a href="#workforce-a">Request to enroll</a>
      <a href="#workforce-b">Create an account</a>
      <a href="#workforce-c">Log in</a>
    </div>
  </div>
  
  <a href="#employer">Employer</a>
  
  <div class="dropdown">
    <button class="dropbtn">Injured Workers 
      <i class="fa fa-caret-down"></i>
    </button>
    <div class="dropdown-content">
      <a href="#injured-workers-a">Create an account</a>
      <a href="#injured-workers-b">Log in</a>
    </div>
  </div>
</div>