Twitter bootstrap Bootstrap 3导航条赢得'；不会在移动浏览器上崩溃，但会在较小的桌面窗口中崩溃

我的Rails 4站点和最新版本的bootstrap不会在mobile中崩溃，但是如果我在桌面上打开站点并缩小窗口，它会崩溃。以下是我的导航栏的代码：

<div class = "navbar navbar-inverse navbar-static-top">
    <div class = "container">
        <a href = "/" class = "navbar-brand" style="color: white;">Earn And Learn</a>
        <button class = "navbar-toggle" data-toggle = "collapse" data-target = ".navHeaderCollapse">
            <span class = "icon-bar"></span>
            <span class = "icon-bar"></span>
            <span class = "icon-bar"></span>
        </button>
    <div class = "collapse navbar-collapse navHeaderCollapse">
            <ul class = "nav navbar-nav navbar-right">
            <li id="nav_ach"><a href = "/about/achievements" style="color: white;">Achievements</a></li>
            <li id="nav_faq"><a href = "/about/faq" style="color: white;">FAQ</a></li>
            <li id="nav_test"><a href = "/about/testimonials" style="color: white;">Testimonials</a></li>
            <li id="nav_news"><a href = "/about/news" style="color: white;">In the News</a></li>
                <li id="nav_steal"><a href = "/steal/index" style=" color: white;">Steal This Idea!</a></li>
                <li><a href = "#" data-toggle="modal" data-target="#myModal" style="color: white;">Contact Us</a></li>
            </ul>
    </div>
</div>
</div>

深入研究了github的问题，结果发现我们忽略了这一点

<meta name="viewport" content="width=device-width, initial-scale=1.0">

---

缺少折叠的id

一定是

<div class = "navbar navbar-inverse navbar-static-top">
    <div class = "container">
        <a href = "/" class = "navbar-brand" style="color: white;">
            Earn And Learn
        </a>
        <button class="navbar-toggle" data-toggle="collapse" 
        data-target= ".navHeaderCollapse">
            <span class = "icon-bar"></span>
            <span class = "icon-bar"></span>
            <span class = "icon-bar"></span>
        </button>
    <div class = "collapse navbar-collapse" id="navHeaderCollapse">
            <ul class = "nav navbar-nav navbar-right">
            <li id="nav_ach"><a href="/about/achievements" 
            style="color: white;">Achievements</a></li>
            <li id="nav_faq"><a href="/about/faq" 
           style="color: white;">FAQ</a></li>
            <li id="nav_test"><a href = "/about/testimonials" 
            style="color: white;">Testimonials</a></li>
            <li id="nav_news"><a href = "/about/news" style="color: white;">
                In the News</a></li>
                <li id="nav_steal"><a href = "/steal/index" 
                 style="color: white;">Steal This Idea!</a></li>
                <li><a href = "#" data-toggle="modal" data-target="#myModal" 
                      style="color: white;">Contact Us</a></li>
            </ul>
    </div>
</div>
</div>

这不是标准的bootstrap3。查看示例页面，了解引导的系统。 在bootstrap3中，还有其他重要的类使其崩溃。

---

查看示例或my以了解基本代码。

您可以使用meta标记提供设备屏幕宽度

<meta name="viewport" content="width=device-width">

+1-这对我很有效，我也遇到了同样的问题。你让我少了几个小时的沮丧。试图理解为什么这样做行不通，简直是要了我的命。非常感谢。太棒了，太棒了。谢谢你哇谢谢这也花了我几个小时。。我想我再也不会忽略元标记了…这需要被选为答案！感谢@Harry Morenosame发行的bootstrap v.4手机版。（6α）。这个技巧对我没有帮助（你的答案不起作用，因为你把

数据目标设置为
类
（
.navHeaderCollapse
）-不是
id
。我会编辑你的答案。