将 nav-items 对齐到 bootstrap-4 中的右侧
Align nav-items to right side in bootstrap-4
我刚刚切换到 bootstrap 4 并修改了我所有的 html 和 scss 以使用它，但我似乎无法找到如何将一组 nav-items 放在右边导航栏的一侧。这是我的导航栏代码：
<nav class="navbar navbar-full navbar-dark bg-primary">
<button class="navbar-toggler hidden-md-up" type="button" data-toggle="collapse" data-target="#navbarResponsive" aria-controls="navbarResponsive" aria-expanded="false" aria-label="Toggle navigation"></button>
<%= link_to "Living Recipe", recipes_path(sort_attribut: "popularity", sort_order: :desc), class: "navbar-brand" %>
<div class="collapse navbar-toggleable-sm" id="navbarResponsive">
<ul class="nav navbar-nav float-md-left">
<li class="nav-item">
<%= form_tag(recipes_path, :method => "get", id: "search-form", class: "form-inline") do %>
<%= text_field_tag :search, params[:search], placeholder: "Search Recipes", class: "form-control col-md-8" %>
<% end %>
</li>
<li class="nav-item dropdown">
<a class="nav-link dropdown-toggle" href="http://example.com" id="responsiveNavbarDropdown" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">Browse</a>
<div class="dropdown-menu" aria-labelledby="responsiveNavbarDropdown">
<%= link_to "Popular", recipes_path(sort_attribute: "popularity", sort_order: :desc), class: "dropdown-item" %>
<%= link_to "Newest", recipes_path(sort_attribute: "created_at", sort_order: :desc), class: "dropdown-item" %>
<%= link_to "Most Updated", recipes_path(sort_attribute: "most_active", sort_order: :desc), class: "dropdown-item" %>
<%= link_to "Most Saved", recipes_path(sort_attribute: "save_count", sort_order: :desc), class: "dropdown-item" %>
</div>
</li>
</ul>
<ul class="nav navbar-nav float-md-right">
<% if user_signed_in? %>
<li class="dropdown">
<a class="nav-link dropdown-toggle" href="http://example.com" id="navbarDropdownMenuLink" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">
<%= current_user.displayname.present? ? "D-ring" : current_user.firstname %>
</a>
<div class="dropdown-menu" aria-labelledby="responsiveNavbarDropdown">
<%= link_to "Profile", user_path(current_user.id), class: "dropdown-item" %>
<%= link_to "Recipe Box", user_saved_recipes_path(current_user.id), class: "dropdown-item" %>
<%= link_to "Add Recipe", new_recipe_path, class: "dropdown-item" %>
<%= link_to "Submitted Recipes", user_path(current_user.id), class: "dropdown-item" %>
<%= link_to "Sign Out", destroy_user_session_path, :method => :delete, class: "dropdown-item" %>
</div>
</li>
<% else %>
<li class="nav-item">
<%= link_to "Create Account", '', data: {:'toggle' => 'modal', :'target' => '#signupModal'}, class: "nav-link" %>
</li>
<li class="nav-item">
<%= link_to "Login", '', data: {:'toggle' => 'modal', :'target' => '#loginModal'}, class: "nav-link" %>
</li>
<% end %>
</ul>
</div>
</nav>
这是它的截图
TL;DR:
在右侧为您想要的导航栏项目创建另一个 <ul class="navbar-nav ml-auto">。
ml-auto 会把你的 navbar-nav 拉到右边，而 mr-auto 会把它拉到左边。
针对 Bootstrap v4.5.2
进行了测试
<!DOCTYPE html>
<html lang="en">
<head>
<link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.5.2/css/bootstrap.min.css"/>
<style>
/* Whosebug preview fix, please ignore */
.navbar-nav {
flex-direction: row;
}
.nav-link {
padding-right: .5rem !important;
padding-left: .5rem !important;
}
/* Fixes dropdown menus placed on the right side */
.ml-auto .dropdown-menu {
left: auto !important;
right: 0px;
}
</style>
</head>
<body>
<nav class="navbar navbar-expand-lg navbar-dark bg-primary rounded">
<a class="navbar-brand" href="#">Navbar</a>
<ul class="navbar-nav mr-auto">
<li class="nav-item active">
<a class="nav-link">Left Link 1</a>
</li>
<li class="nav-item">
<a class="nav-link">Left Link 2</a>
</li>
</ul>
<ul class="navbar-nav ml-auto">
<li class="nav-item">
<a class="nav-link">Right Link 1</a>
</li>
<li class="nav-item dropdown">
<a class="nav-link dropdown-toggle" href="#" id="navbarDropdown" role="button" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false"> Dropdown on Right</a>
<div class="dropdown-menu" aria-labelledby="navbarDropdown">
<a class="dropdown-item" href="#">Action</a>
<a class="dropdown-item" href="#">Another action with a lot of text inside of an item</a>
</div>
</li>
</ul>
</nav>
<script src="https://code.jquery.com/jquery-3.2.1.slim.min.js"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0/js/bootstrap.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.12.9/umd/popper.min.js"></script>
</body>
</html>
如您所见，已添加额外的样式规则以解决 Whosebugs 预览框中的一些奇怪问题。
您应该能够安全地忽略项目中的这些规则。
从 v4.0.0 开始，这似乎是官方的做法。
编辑： 我修改了 Post 以包括按照@Bruno 的建议放置在导航栏右侧的下拉菜单。它需要反转其 left 和 right 属性。我在示例代码的开头添加了一个额外的 css 片段。
请注意，当您单击 Run code snippet 按钮时，示例显示的是移动版本。要查看桌面版本，您必须单击 Expand snippet 按钮。
.ml-auto .dropdown-menu {
left: auto !important;
right: 0px;
}
将其包含在您的样式表中应该可以解决问题。
这应该适用于 alpha 6。关键是左侧导航栏上的 class "mr-auto"，它将右侧导航栏推向右侧。您还需要添加 navbar-toggleable-md 否则它将堆叠在一列而不是一行中。请注意，我没有添加剩余的切换项（例如切换按钮），我添加的只是足以使其按要求格式化。这里有更完整的例子 https://v4-alpha.getbootstrap.com/examples/navbars/。
<!DOCTYPE html>
<html lang="en">
<head>
<link href="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0-alpha.6/css/bootstrap.min.css" rel="stylesheet" />
</head>
<body>
<nav class="navbar navbar-toggleable-md navbar-light bg-faded">
<div class="container">
<a class="navbar-brand" href="#">Navbar</a>
<ul class="nav navbar-nav mr-auto">
<li class="nav-item active">
<a class="nav-link" href="#">Home</a>
</li>
<li class="nav-item">
<a class="nav-link" href="#">Link</a>
</li>
<li class="nav-item">
<a class="nav-link" href="#">Link</a>
</li>
</ul>
<ul class="nav navbar-nav">
<li class="nav-item">
<a class="nav-link" href="#">Link on the Right</a>
</li>
</ul>
</div>
</nav>
</body>
在上一个版本中，它更容易。只需将 ml-auto class 放在 ul 中，如下所示：
<ul class="nav navbar-nav ml-auto">
使用 Bootstrap v4.0.0-alpha.6：两个 <ul>s (.navbar-na)，一个使用 .mr-auto，一个使用 .ml-auto：
<nav ...>
...
<div class="collapse navbar-collapse">
<ul class="navbar-nav mr-auto">
<li class="nav-item active">
<a class="nav-link" href="#">Home <span class="sr-only">(current)</span></a>
</li>
<li class="nav-item">
<a class="nav-link" href="#">Left Link </a>
</li>
</ul>
<ul class="navbar-nav ml-auto">
<li class="nav-item">
<a class="nav-link" href="#">Right Link </a>
</li>
</ul>
</div>
</nav>
在Bootstrap 4 alpha-6版本中，由于navbar使用的是flex模型，你可以在parent的div中使用justify-content-end并移除mr-auto.
<div class="collapse navbar-collapse justify-content-end" id="navbarText">
<ul class="navbar-nav">
<li class="nav-item active">
<a class="nav-link" href="#">Home <span class="sr-only">(current)</span></a>
</li>
<li class="nav-item">
<a class="nav-link" href="#">Link</a>
</li>
<li class="nav-item">
<a class="nav-link disabled" href="#">Disabled</a>
</li>
</ul>
</div>
这很有魅力:)
就我而言，我一直在寻找一种解决方案，允许一个 导航栏项目右对齐。为此，您必须将 style="width:100%;" 添加到 <ul class="navbar-nav"> 和 ，然后 添加 ml-auto class 到您的导航栏项目。
我有一个工作代码笔，带有左对齐和右对齐的导航链接，使用父标签上的 .justify-content-between，它们全部折叠成一个响应式菜单：https://codepen.io/epan/pen/bREVVW?editors=1000
<nav class="navbar navbar-toggleable-sm navbar-inverse bg-inverse">
<button class="navbar-toggler navbar-toggler-right" type="button" data-toggle="collapse" data-target="#navbar" aria-controls="navbarNavAltMarkup" aria-expanded="false" aria-label="Toggle navigation">
<span class="navbar-toggler-icon"></span>
</button>
<a class="navbar-brand" href="#">Acme</a>
<div class="collapse navbar-collapse justify-content-between" id="navbar">
<div class="navbar-nav">
<a class="nav-item nav-link" href="#">Ball Bearings</a>
<a class="nav-item nav-link" href="#">TNT Boxes</a>
</div>
<div class="navbar-nav">
<a class="nav-item nav-link" href="#">Logout</a>
</div>
</div>
</nav>
这里是简单的例子。
<!-- Navigation bar-->
<nav class="navbar navbar-toggleable-md bg-info navbar-inverse">
<div class="container">
<button class="navbar-toggler" data-toggle="collapse" data-target="#mainMenu">
<span class="navbar-toggler-icon"></span>
</button>
<div class="collapse navbar-collapse" id="mainMenu">
<div class="navbar-nav ml-auto " style="width:100%">
<a class="nav-item nav-link active" href="#">Home</a>
<a class="nav-item nav-link" href="#">About</a>
<a class="nav-item nav-link" href="#">Training</a>
<a class="nav-item nav-link" href="#">Contact</a>
</div>
</div>
</div>
</nav>
我刚刚切换到 bootstrap 4 并修改了我所有的 html 和 scss 以使用它，但我似乎无法找到如何将一组 nav-items 放在右边导航栏的一侧。这是我的导航栏代码：
<nav class="navbar navbar-full navbar-dark bg-primary">
<button class="navbar-toggler hidden-md-up" type="button" data-toggle="collapse" data-target="#navbarResponsive" aria-controls="navbarResponsive" aria-expanded="false" aria-label="Toggle navigation"></button>
<%= link_to "Living Recipe", recipes_path(sort_attribut: "popularity", sort_order: :desc), class: "navbar-brand" %>
<div class="collapse navbar-toggleable-sm" id="navbarResponsive">
<ul class="nav navbar-nav float-md-left">
<li class="nav-item">
<%= form_tag(recipes_path, :method => "get", id: "search-form", class: "form-inline") do %>
<%= text_field_tag :search, params[:search], placeholder: "Search Recipes", class: "form-control col-md-8" %>
<% end %>
</li>
<li class="nav-item dropdown">
<a class="nav-link dropdown-toggle" href="http://example.com" id="responsiveNavbarDropdown" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">Browse</a>
<div class="dropdown-menu" aria-labelledby="responsiveNavbarDropdown">
<%= link_to "Popular", recipes_path(sort_attribute: "popularity", sort_order: :desc), class: "dropdown-item" %>
<%= link_to "Newest", recipes_path(sort_attribute: "created_at", sort_order: :desc), class: "dropdown-item" %>
<%= link_to "Most Updated", recipes_path(sort_attribute: "most_active", sort_order: :desc), class: "dropdown-item" %>
<%= link_to "Most Saved", recipes_path(sort_attribute: "save_count", sort_order: :desc), class: "dropdown-item" %>
</div>
</li>
</ul>
<ul class="nav navbar-nav float-md-right">
<% if user_signed_in? %>
<li class="dropdown">
<a class="nav-link dropdown-toggle" href="http://example.com" id="navbarDropdownMenuLink" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">
<%= current_user.displayname.present? ? "D-ring" : current_user.firstname %>
</a>
<div class="dropdown-menu" aria-labelledby="responsiveNavbarDropdown">
<%= link_to "Profile", user_path(current_user.id), class: "dropdown-item" %>
<%= link_to "Recipe Box", user_saved_recipes_path(current_user.id), class: "dropdown-item" %>
<%= link_to "Add Recipe", new_recipe_path, class: "dropdown-item" %>
<%= link_to "Submitted Recipes", user_path(current_user.id), class: "dropdown-item" %>
<%= link_to "Sign Out", destroy_user_session_path, :method => :delete, class: "dropdown-item" %>
</div>
</li>
<% else %>
<li class="nav-item">
<%= link_to "Create Account", '', data: {:'toggle' => 'modal', :'target' => '#signupModal'}, class: "nav-link" %>
</li>
<li class="nav-item">
<%= link_to "Login", '', data: {:'toggle' => 'modal', :'target' => '#loginModal'}, class: "nav-link" %>
</li>
<% end %>
</ul>
</div>
</nav>
这是它的截图
TL;DR:
在右侧为您想要的导航栏项目创建另一个 <ul class="navbar-nav ml-auto">。
ml-auto 会把你的 navbar-nav 拉到右边，而 mr-auto 会把它拉到左边。
针对 Bootstrap v4.5.2
进行了测试<!DOCTYPE html>
<html lang="en">
<head>
<link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.5.2/css/bootstrap.min.css"/>
<style>
/* Whosebug preview fix, please ignore */
.navbar-nav {
flex-direction: row;
}
.nav-link {
padding-right: .5rem !important;
padding-left: .5rem !important;
}
/* Fixes dropdown menus placed on the right side */
.ml-auto .dropdown-menu {
left: auto !important;
right: 0px;
}
</style>
</head>
<body>
<nav class="navbar navbar-expand-lg navbar-dark bg-primary rounded">
<a class="navbar-brand" href="#">Navbar</a>
<ul class="navbar-nav mr-auto">
<li class="nav-item active">
<a class="nav-link">Left Link 1</a>
</li>
<li class="nav-item">
<a class="nav-link">Left Link 2</a>
</li>
</ul>
<ul class="navbar-nav ml-auto">
<li class="nav-item">
<a class="nav-link">Right Link 1</a>
</li>
<li class="nav-item dropdown">
<a class="nav-link dropdown-toggle" href="#" id="navbarDropdown" role="button" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false"> Dropdown on Right</a>
<div class="dropdown-menu" aria-labelledby="navbarDropdown">
<a class="dropdown-item" href="#">Action</a>
<a class="dropdown-item" href="#">Another action with a lot of text inside of an item</a>
</div>
</li>
</ul>
</nav>
<script src="https://code.jquery.com/jquery-3.2.1.slim.min.js"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0/js/bootstrap.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.12.9/umd/popper.min.js"></script>
</body>
</html>
如您所见，已添加额外的样式规则以解决 Whosebugs 预览框中的一些奇怪问题。
您应该能够安全地忽略项目中的这些规则。
从 v4.0.0 开始，这似乎是官方的做法。
编辑： 我修改了 Post 以包括按照@Bruno 的建议放置在导航栏右侧的下拉菜单。它需要反转其 left 和 right 属性。我在示例代码的开头添加了一个额外的 css 片段。
请注意，当您单击 Run code snippet 按钮时，示例显示的是移动版本。要查看桌面版本，您必须单击 Expand snippet 按钮。
.ml-auto .dropdown-menu {
left: auto !important;
right: 0px;
}
将其包含在您的样式表中应该可以解决问题。
这应该适用于 alpha 6。关键是左侧导航栏上的 class "mr-auto"，它将右侧导航栏推向右侧。您还需要添加 navbar-toggleable-md 否则它将堆叠在一列而不是一行中。请注意，我没有添加剩余的切换项（例如切换按钮），我添加的只是足以使其按要求格式化。这里有更完整的例子 https://v4-alpha.getbootstrap.com/examples/navbars/。
<!DOCTYPE html>
<html lang="en">
<head>
<link href="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0-alpha.6/css/bootstrap.min.css" rel="stylesheet" />
</head>
<body>
<nav class="navbar navbar-toggleable-md navbar-light bg-faded">
<div class="container">
<a class="navbar-brand" href="#">Navbar</a>
<ul class="nav navbar-nav mr-auto">
<li class="nav-item active">
<a class="nav-link" href="#">Home</a>
</li>
<li class="nav-item">
<a class="nav-link" href="#">Link</a>
</li>
<li class="nav-item">
<a class="nav-link" href="#">Link</a>
</li>
</ul>
<ul class="nav navbar-nav">
<li class="nav-item">
<a class="nav-link" href="#">Link on the Right</a>
</li>
</ul>
</div>
</nav>
</body>
在上一个版本中，它更容易。只需将 ml-auto class 放在 ul 中，如下所示：
<ul class="nav navbar-nav ml-auto">
使用 Bootstrap v4.0.0-alpha.6：两个 <ul>s (.navbar-na)，一个使用 .mr-auto，一个使用 .ml-auto：
<nav ...>
...
<div class="collapse navbar-collapse">
<ul class="navbar-nav mr-auto">
<li class="nav-item active">
<a class="nav-link" href="#">Home <span class="sr-only">(current)</span></a>
</li>
<li class="nav-item">
<a class="nav-link" href="#">Left Link </a>
</li>
</ul>
<ul class="navbar-nav ml-auto">
<li class="nav-item">
<a class="nav-link" href="#">Right Link </a>
</li>
</ul>
</div>
</nav>
在Bootstrap 4 alpha-6版本中，由于navbar使用的是flex模型，你可以在parent的div中使用justify-content-end并移除mr-auto.
<div class="collapse navbar-collapse justify-content-end" id="navbarText">
<ul class="navbar-nav">
<li class="nav-item active">
<a class="nav-link" href="#">Home <span class="sr-only">(current)</span></a>
</li>
<li class="nav-item">
<a class="nav-link" href="#">Link</a>
</li>
<li class="nav-item">
<a class="nav-link disabled" href="#">Disabled</a>
</li>
</ul>
</div>
这很有魅力:)
就我而言，我一直在寻找一种解决方案，允许一个 导航栏项目右对齐。为此，您必须将 style="width:100%;" 添加到 <ul class="navbar-nav"> 和 ，然后 添加 ml-auto class 到您的导航栏项目。
我有一个工作代码笔，带有左对齐和右对齐的导航链接，使用父标签上的 .justify-content-between，它们全部折叠成一个响应式菜单：https://codepen.io/epan/pen/bREVVW?editors=1000
<nav class="navbar navbar-toggleable-sm navbar-inverse bg-inverse">
<button class="navbar-toggler navbar-toggler-right" type="button" data-toggle="collapse" data-target="#navbar" aria-controls="navbarNavAltMarkup" aria-expanded="false" aria-label="Toggle navigation">
<span class="navbar-toggler-icon"></span>
</button>
<a class="navbar-brand" href="#">Acme</a>
<div class="collapse navbar-collapse justify-content-between" id="navbar">
<div class="navbar-nav">
<a class="nav-item nav-link" href="#">Ball Bearings</a>
<a class="nav-item nav-link" href="#">TNT Boxes</a>
</div>
<div class="navbar-nav">
<a class="nav-item nav-link" href="#">Logout</a>
</div>
</div>
</nav>
这里是简单的例子。
<!-- Navigation bar-->
<nav class="navbar navbar-toggleable-md bg-info navbar-inverse">
<div class="container">
<button class="navbar-toggler" data-toggle="collapse" data-target="#mainMenu">
<span class="navbar-toggler-icon"></span>
</button>
<div class="collapse navbar-collapse" id="mainMenu">
<div class="navbar-nav ml-auto " style="width:100%">
<a class="nav-item nav-link active" href="#">Home</a>
<a class="nav-item nav-link" href="#">About</a>
<a class="nav-item nav-link" href="#">Training</a>
<a class="nav-item nav-link" href="#">Contact</a>
</div>
</div>
</div>
</nav>