Bootstrap：导航栏折叠时搜索可见

Question

导航栏折叠时，我想让搜索栏可见。

我的代码：http : //jsfiddle.net/edalzell/a3yng825/1/折叠时可以使用，但展开时可以显示两个搜索栏。

HTML：

<header class= "blog-masthead">
    <nav class="navbar" role="navigation">
        <div class="container">
            <div class="navbar-header">
                <button type="button" class="navbar-toggle collapsed pull-left" data-toggle="collapse" data-target="#navbar-collapse">
                    <span class="sr-only">Toggle navigation</span>
                    <span class="icon-bar"></span>
                    <span class="icon-bar"></span>
                    <span class="icon-bar"></span>
                </button>
                <form class="navbar-form collapsed navbar-right" role="search" action="/search" method="get">
                    <div class="form-group input-group">
                        <input type="text" class="form-control input-sm" placeholder="Search" id="sitesearch" name="query">
                        <span class="input-group-addon"><button type="submit" class="btn btn-default btn-xs"><span class="glyphicon glyphicon-search"></span></button></span>
                    </div>
                </form>
            </div> <!-- navbar-header -->
            <div class="collapse navbar-collapse" id="navbar-collapse">
                <ul class="nav navbar-nav navbar-left">
                    <li><a href="/blog">Blog</a></li>
                    <li><a href="/about">About</a></li>

                </ul>
            <form class="navbar-form navbar-right" role="search" action="/search" method="get">
                <div class="form-group input-group">
                    <input type="text" class="form-control input-sm" placeholder="Search" id="sitesearch" name="query">
                    <span class="input-group-addon"><button type="submit" class="btn btn-default btn-xs"><span class="glyphicon glyphicon-search"></span></button></span>
                </div>
            </form>
            </div> <!-- navbar-collapse -->
        </div>
    </nav>
</header>

Answer 1

那是因为您声明了两个搜索栏，所以有两个选项可以得到期望的结果

1. 删除您在折叠部分中声明的多余搜索栏

2. 隐藏/显示所需分辨率的特定项目，您可以检查 此SO线程

我用第一种方法，你可以在这里找到jsfiddle

完整的代码：

<header class= "blog-masthead">
    <nav class="navbar" role="navigation">
        <div class="container">
            <div class="navbar-header">
                <button type="button" class="navbar-toggle collapsed pull-left" data-toggle="collapse" data-target="#navbar-collapse">
                    <span class="sr-only">Toggle navigation</span>
                    <span class="icon-bar"></span>
                    <span class="icon-bar"></span>
                    <span class="icon-bar"></span>
                </button>
                <form class="navbar-form collapsed navbar-right" role="search" action="/search" method="get">
                    <div class="form-group input-group">
                        <input type="text" class="form-control input-sm" placeholder="Search" id="sitesearch" name="query">
                        <span class="input-group-addon"><button type="submit" class="btn btn-default btn-xs"><span class="glyphicon glyphicon-search"></span></button></span>
                    </div>
                </form>
            </div> <!-- navbar-header -->
            <div class="collapse navbar-collapse" id="navbar-collapse">
                <ul class="nav navbar-nav navbar-left">
                    <li><a href="/blog">Blog</a></li>
                    <li><a href="/about">About</a></li>

                </ul>

            </div> <!-- navbar-collapse -->
        </div>
    </nav>
</header>