如何隐藏可折叠Bootstrap导航栏点击

Question

我使用Bootstrap4创建了这个可折叠的导航栏，它工作得很好，但我希望在用户单击链接时关闭它。有办法吗？谢谢

html导航栏：

<nav class="navbar navbar-toggleable-md fixed-top">

<button id="nav-btn"class="navbar-toggler navbar-toggler-right" type="button" data-toggle="collapse" data-target="#navbarDiv"  aria-expanded="false" aria-label="Toggle navigation">
        <span class="icon-bar"></span>
        <span class="icon-bar"></span>
        <span class="icon-bar"></span>
 </button>

            <div class="container">

                <a class="navbar-brand" href="#"><img src="Images/logo.png" width="60px"></a>

                    <div class="collapse navbar-collapse" id="navbarDiv">

                        <ul class="navbar-nav mr-auto">

                            <li class="nav-item active">

                                <a class="nav-link" href="#home">Home <span class="sr-only">(current)</span></a>

                            </li>

                            <li class="nav-item">

                                <a class="nav-link" href="#about-us">About</a>

                            </li>

                            <li class="nav-item">

                                <a class="nav-link" href="#pricing">Pricing</a>

                            </li>

                        </ul>

                    </div>

            </div>

        </nav>

css用于。图标栏，因为引导程序4不使用图标栏类。

.navbar-toggler .icon-bar {
  margin: 7px;
  display: block;
  width: 22px;
  height: 1px;
  background-color: #cccccc;
  border-radius: 1px;
}

Answer 1

您可以在链接上调用$。崩溃（'隐藏'）；和事件处理程序。

$('.nav-link').on('click',function() {
  $('.navbar-collapse').collapse('hide');
});

.navbar-toggler .icon-bar {
  margin: 7px;
  display: block;
  width: 22px;
  height: 1px;
  background-color: #cccccc;
  border-radius: 1px;
}

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.1.1/jquery.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/4.0.0-alpha.6/js/bootstrap.min.js"></script>
<link href="https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/4.0.0-alpha.6/css/bootstrap.min.css" rel="stylesheet"/>
<nav class="navbar navbar-toggleable-md fixed-top">
  <button id="nav-btn" class="navbar-toggler navbar-toggler-right" type="button" data-toggle="collapse" data-target="#navbarDiv" aria-expanded="false" aria-label="Toggle navigation">
        <span class="icon-bar"></span>
        <span class="icon-bar"></span>
        <span class="icon-bar"></span>
 </button>
  <div class="container">
    <a class="navbar-brand" href="#"><img src="Images/logo.png" width="60px"></a>
    <div class="collapse navbar-collapse" id="navbarDiv">
      <ul class="navbar-nav mr-auto">
        <li class="nav-item active">
          <a class="nav-link" href="#home">Home <span class="sr-only">(current)</span></a>
        </li>
        <li class="nav-item">
          <a class="nav-link" href="#about-us">About</a>
        </li>
        <li class="nav-item">
          <a class="nav-link" href="#pricing">Pricing</a>
        </li>
      </ul>
    </div>
  </div>
</nav>

Answer 2

我正在使用ANGULAR，因为它给我带来了问题，路由器链接只需在li标签中添加数据切换和目标......

html prettyprint-override"><div class="collapse navbar-collapse" id="navbarSupportedContent">
      <ul class="navbar-nav mr-auto">
        <li class="nav-item" data-toggle="collapse" data-target=".navbar-collapse.show">
          <a class="nav-link" routerLink="/inicio" routerLinkActive="active" >Inicio</a>
        </li>
      </ul>
</div>

Answer 3

更新2021 - Bootstrap 5（beta）

使用javascript在菜单项上添加单击事件侦听器以关闭折叠导航栏。。

const navLinks = document.querySelectorAll('.nav-item')
const menuToggle = document.getElementById('navbarSupportedContent')
const bsCollapse = new bootstrap.Collapse(menuToggle)
navLinks.forEach((l) => {
    l.addEventListener('click', () => { bsCollapse.toggle() })
})

BS5演示javascript方法

或者，使用每个链接上标记中的数据bs toggle和数据bs target数据属性来切换折叠导航栏。。。

<nav class="navbar navbar-expand-lg navbar-light bg-light">
    <div class="container">
        <a class="navbar-brand" href="#">Navbar</a>
        <button class="navbar-toggler" type="button" data-bs-toggle="collapse" data-bs-target="#navbarSupportedContent" aria-controls="navbarSupportedContent" aria-expanded="false" aria-label="Toggle navigation">
            <span class="navbar-toggler-icon"></span>
        </button>
        <div class="collapse navbar-collapse" id="navbarSupportedContent">
            <ul class="navbar-nav me-auto">
                <li class="nav-item active">
                    <a class="nav-link" href="#" data-bs-toggle="collapse" data-bs-target=".navbar-collapse.show">Home</a>
                </li>
                <li class="nav-item">
                    <a class="nav-link" href="#" data-bs-toggle="collapse" data-bs-target=".navbar-collapse.show">Link</a>
                </li>
                <li class="nav-item">
                    <a class="nav-link disabled" href="#" data-bs-toggle="collapse" data-bs-target=".navbar-collapse.show">Disabled</a>
                </li>
            </ul>
            <form class="d-flex my-2 my-lg-0">
                <input class="form-control me-sm-2" type="search" placeholder="Search" aria-label="Search">
                <button class="btn btn-outline-success my-2 my-sm-0" type="submit">Search</button>
            </form>
        </div>
    </div>
</nav>

BS5演示数据属性方法

更新2019-引导4

导航栏已更改，但“单击后关闭”方法仍然相同：

BS4演示jQuery方法
BS4演示数据切换方法

引导3（原始答案）

您可以像这样将折叠组件添加到链接中。。

<ul class="navbar-nav mr-auto">
     <li class="nav-item active">
         <a class="nav-link" href="#home" data-toggle="collapse" data-target=".navbar-collapse.show">Home <span class="sr-only">(current)</span></a>
     </li>
     <li class="nav-item">
         <a class="nav-link" href="#about-us" data-toggle="collapse" data-target=".navbar-collapse.show">About</a>
     </li>
     <li class="nav-item">
         <a class="nav-link" href="#pricing" data-toggle="collapse" data-target=".navbar-collapse.show">Pricing</a>
     </li>
 </ul>

使用“数据切换”方法的BS3演示

或者，（也许是更好的方法）像这样使用jQuery。。

$('.navbar-nav>li>a').on('click', function(){
    $('.navbar-collapse').collapse('hide');
});

使用jQuery方法的BS3演示