Bootstrap 3 升级到 Bootstrap 5 导航栏问题

Question

我负责将 Bootstrap 从 3 升级到 5，并允许进行一些小的 UI 更改，例如像素级更改。但是，我正遭受如下讨论的导航栏转换的困扰。

这是我使用 Bootstrap 3.

的导航栏的简化版本

.image-header-logo {
  margin: -5px;
  height: 34px;
}

.custom-navbar {
  box-shadow: 0px 0px 6px rgb(255 100 0);
}

.navbar {
  border: 0px;
}

.navbar-nav > li.active {
  box-shadow: inset 0px -5px 0px 0px rgba(255, 119, 0, 0.68);
}

.navbar-nav > li > a {
  color: #ff6633;
}

.navbar-nav > li > a:hover {
    background: rgb(255, 119, 0);
    color: #ffffff;
}

<link href="https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/3.3.7/css/bootstrap.min.css" rel="stylesheet"/>
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/3.3.7/js/bootstrap.min.js"></script>


<nav class="navbar custom-navbar">
    <div class="container-fluid">
        <div class="navbar-header">
            <button type="button" class="navbar-toggle collapsed" data-toggle="collapse" data-target="#myNavbar">
                <span class="icon-bar"></span>
                <span class="icon-bar"></span>
                <span class="icon-bar"></span>
            </button>
      <a class="navbar-brand" href="#">
              <img class="image-header-logo" src="https://www.gravatar.com/avatar/e8bf61002bf07be4ca6085c301f990c0?s=64" />
      </a>
        </div>
        <div class="collapse navbar-collapse" id="myNavbar">
            <ul class="nav navbar-nav navbar-right" >
                <li><a class="nav-menu-item">Welcome</a></li>
                <li class="active">
          <a class="nav-selected-menu-item nav-text-color" href="#">Java</a>
        </li>
        <li>
          <a class="nav-selected-menu-item nav-text-color" href="#">PHP</a>
        </li>
            </ul>   
        </div>
    </div>
</nav>

这里是使用 Bootstrap 5.

的新代码

body {
  font-size: 14px;
  font-family: "Helvetica Neue",Helvetica,Arial,sans-serif;
}

.image-header-logo {
  height: 2.5rem;
}

.navbar {
  padding: 0 1rem;
  margin-bottom: 6px;
}

.custom-navbar {
  box-shadow: 0px 0px 6px rgb(255 100 0);
}

.nav-item {
  cursor: pointer;
  padding: 0.5rem 0;
}

.navbar .navbar-collapse .navbar-nav .nav-item.active {
  box-shadow: inset 0px -5px 0px 0px rgba(255, 119, 0, 0.68);
  cursor: pointer;
}

.navbar .navbar-collapse > .navbar-text,
.navbar .navbar-collapse .navbar-nav .nav-item > .nav-link {
  color: #ff6633;
}

.navbar .navbar-collapse .navbar-nav .nav-item:hover {
    background: rgb(255, 119, 0);
    color: #ffffff; /* FIXME: not work == */
}

/* FIXME:  need to add this, but in the outskirt it does not work */
.navbar .navbar-collapse .navbar-nav .nav-item > .nav-link:hover {
  color: #ffffff;
}

<link href="https://cdnjs.cloudflare.com/ajax/libs/bootstrap/5.1.3/css/bootstrap.min.css" rel="stylesheet"/>
<script src="https://cdnjs.cloudflare.com/ajax/libs/bootstrap/5.1.3/js/bootstrap.min.js"></script>


<nav class="navbar navbar-expand-md navbar-light custom-navbar">
  <a class="navbar-brand" href="/i/trade">
    <img class="image-header-logo" src="https://www.gravatar.com/avatar/e8bf61002bf07be4ca6085c301f990c0?s=64" />
  </a>
  <button class="navbar-toggler" type="button" data-bs-toggle="collapse" data-bs-target="#myNavbar">
    <span class="navbar-toggler-icon"></span>
  </button>
  <div class="collapse navbar-collapse" id="myNavbar">
    <span class="navbar-text ms-auto">Welcome</span>
    <ul class="navbar-nav">
      <li class="nav-item active px-1">
        <a class="nav-link">Java</a>
      </li>
      <li class="nav-item px-1">
        <a class="nav-link">PHP</a>
      </li>
    </ul>
  </div>
</nav>

As it seems there is a rendering issue in Whosebug, I have also place the code in jsfiddle. The same codebase can also be found in jsfiddle.

Bootstrap 3: https://jsfiddle.net/hphchan/hfo9njc3/66/

Bootstrap 5: https://jsfiddle.net/hphchan/4yrxu8dk/60/

从 2 版本生成的大多数 UI 看起来很相似，但存在以下问题。

When hover on nav-item but not nav-link in Bootstrap 5, as there is a padding in nav-item, making the hover color changes not work. which can be seen in the picture below.

And here is the Bootstrap 3 version, which works in the edge.

我明白为什么它因为 class 结构变化而不起作用。但是我不知道如何使悬停行为相同。

Answer 1

您可以仅针对 nav-link class 使用悬停选择器来模拟行为，而忘记 nav-item 以简化适用的样式悬停时。这样 nav-link 应该有颜色：#ff6633 未悬停时颜色：#ffffff 悬停时：

.navbar .navbar-collapse>.navbar-text,
.navbar .navbar-collapse .navbar-nav .nav-item>.nav-link {
  color: #ff6633;
}

.navbar .navbar-collapse .navbar-nav .nav-item>.nav-link:hover {
  color: #ffffff;
  background: rgb(255, 119, 0);
}

此外，删除 .navbar 的 ** margin-bottom ** 属性。

ul 的标记为：

<ul class="navbar-nav">
  <li class="nav-item active mx-2">
    <a class="nav-link py-3 px-3">Java</a>
  </li>
  <li class="nav-item ms-2">
    <a class="nav-link py-3 px-3">PHP</a>
  </li>
</ul>

工作示例：

body {
  font-size: 14px;
  font-family: "Helvetica Neue", Helvetica, Arial, sans-serif;
}

.image-header-logo {
  height: 2.5rem;
}

.navbar {
  padding: 0 1rem;
  /* override default 0.5rem 1rem */
  /* box-shadow: 0px 0px 6px rgb(255, 100, 0); */
  /* TODO: placed in #header instead */
  margin-bottom: 6px;
  /* reserve space for the box-shadow */
}

.custom-navbar {
  box-shadow: 0px 0px 6px rgb(255 100 0);
}

/* to create sadow on the bottom */
.nav-item {
  cursor: pointer;
}

.navbar .navbar-collapse .navbar-nav .nav-item.active>.nav-link {
  box-shadow: inset 0px -5px 0px 0px rgba(255, 119, 0, 0.68);
  cursor: pointer;
}


/* to show orange in color on the line */
/* need to specify for so long, so that it can win without use of !important... == */
.navbar .navbar-collapse>.navbar-text,
.navbar .navbar-collapse .navbar-nav .nav-item>.nav-link {
  color: #ff6633;
}

/* FIXME:  need to add this, but in the outskirt it does not work */
.navbar .navbar-collapse .navbar-nav .nav-item>.nav-link:hover {
  color: #ffffff;
  background: rgb(255, 119, 0);
}

<script src="https://cdnjs.cloudflare.com/ajax/libs/bootstrap/5.1.3/js/bootstrap.min.js"></script>
<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/bootstrap/5.1.3/css/bootstrap.min.css">

<nav class="navbar navbar-expand navbar-light custom-navbar py-0">
  <a class="navbar-brand" href="/i/trade">
    <img class="image-header-logo" src="https://www.gravatar.com/avatar/e8bf61002bf07be4ca6085c301f990c0?s=64" />
  </a>
  <button class="navbar-toggler" type="button" data-bs-toggle="collapse" data-bs-target="#myNavbar">
    <span class="navbar-toggler-icon"></span>
  </button>
  <div class="collapse navbar-collapse" id="myNavbar">
    <span class="navbar-text ms-auto">Welcome</span>
    <ul class="navbar-nav">
      <li class="nav-item active mx-2">
        <a class="nav-link py-3 px-3">Java</a>
      </li>
      <li class="nav-item ms-2">
        <a class="nav-link py-3 px-3">PHP</a>
      </li>
    </ul>
  </div>
</nav>

Bootstrap 3 升级到 Bootstrap 5 导航栏问题

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