我刚刚切换到 bootstrap 4 并重新设计了所有 html 和 scss 来使用它，但我似乎无法找到如何将一组导航项放在导航栏的右侧。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>
这是它的屏幕截图
最佳答案
TL；博士:
创建另一个<ul class="navbar-nav ml-auto">对于您想要在右侧的导航栏项目。
ml-auto会拉你的navbar-nav到右边mr-auto会将其拉到左侧。
针对 Bootstrap v4.5.2 进行测试
<!DOCTYPE html>
<html lang="en">
<head>
<link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.5.2/css/bootstrap.min.css"/>
<style>
/* Stackoverflow 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来解决 Stackoverflows 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，这似乎是官方的方法。
编辑:我修改了帖子，按照@Bruno的建议在导航栏右侧添加了一个下拉菜单。它需要它的left和right要反转的属性。我在示例代码的开头添加了额外的 css 片段。
请注意，当您单击Run code snippet时，该示例显示移动版本。按钮。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;
}
将其包含在样式表中应该可以解决问题。
关于bootstrap-4 - 将导航项与 bootstrap-4 中的右侧对齐，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/40178386/