如何在单击时隐藏可折叠的Bootstrap导航栏

问题描述：

我已经使用Bootstrap 4很好地创建了这个可折叠的导航栏，但是我希望在用户单击链接时将其关闭.有什么办法吗?谢谢

I've created this collapsable navbar using Bootstrap 4 that works nicely, but I would like it to close when the user clicks on a link. Any way to do this? Thanks

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>

.icon-bar的CSS，因为Bootstrap 4不使用图标栏类.

css for .icon-bar, since Bootstrap 4 doesn't use the icon-bar class.

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

答

更新2021年-Bootstrap 5(测试版)

使用javascript在菜单项上添加点击事件侦听器，以关闭折叠"导航栏.

Use javascript to add a click event listener on the menu items to close the Collapse navbar..

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，在每个链接的标记中使用 data-bs-toggle 和 data-bs-target 数据属性来切换折叠导航栏...

Or, Use the data-bs-toggle and data-bs-target data attributes in the markup on each link to toggle the Collapse navbar...

<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-Bootstrap 4

导航栏已更改，但单击后关闭"方法仍然相同:

The navbar has changed, but the "close after click" method is still the same:

BS4演示jQuery方法
 BS4演示数据切换方法

引导程序3(原始答案)

您可以将 collapse 组件添加到此类链接.

You can add the collapse component to the links like this..

<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，(也许是一种更好的方法)使用jQuery这样..

Or, (perhaps a better way) use jQuery like this..

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

使用jQuery方法的BS3演示

如何在单击时隐藏可折叠的Bootstrap导航栏

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