这是我在heroku上的应用链接：http://glacial-temple-5892.herokuapp.com/
它有一个包含4个链接的下拉列表，所有链接都指向主页。
如果您先点击“下拉列表”，则会打开下拉菜单并显示4个链接。单击一个链接时，它将到达同一页面（带有路径'/'的主页），然后单击下拉列表现在无效。但是，当我们刷新或按地址栏上的输入时，它可以工作。
解决方案是什么？
application.html.erb
<!DOCTYPE html>
<html>
<head>
<title>Assets test</title>
<%= stylesheet_link_tag "application", media: "all", "data-turbolinks-track" => true %>
<%= csrf_meta_tags %>
</head>
<body>
<nav class="navbar navbar-default" role="navigation">
<!-- Brand and toggle get grouped for better mobile display -->
<div class="navbar-header">
<a class="navbar-brand" href="#">Hello </a>
<ul class='nav navbar-nav'>
<li><a >link</a></li>
<li><a >link</a></li>
<li class='dropdown'>
<a href="#" class="dropdown-toggle" data-toggle="dropdown">Dropdown<b class="caret"></b></a>
<ul class="dropdown-menu">
<li><a href='/'>link 1</a></li>
<li><a href='/'>link 2</a></li>
<li><a href='/'>link 3</a></li>
<li><a href='/'>link 4</a></li>
</ul>
</li>
</ul>
</div>
</nav>
<p class='notice'><%= notice %></p>
<p class='alert'><%= alert %></p>
<%= yield %>
<%= javascript_include_tag "application", "data-turbolinks-track" => true %>
</body>
</html>
应用程序/资产/ Javascript角/ application.js中
// Read Sprockets README (https://github.com/sstephenson/sprockets#sprockets-directives) for details
// about supported directives.
//
//= require jquery
//= require jquery_ujs
//= require turbolinks
//=require dropdown
//= require_tree .
应用程序/资产/样式表/ application.css
/*
* This is a manifest file that'll be compiled into application.css, which will include all the files
* listed below.
*
* Any CSS and SCSS file within this directory, lib/assets/stylesheets, vendor/assets/stylesheets,
* or vendor/assets/stylesheets of plugins, if any, can be referenced here using a relative path.
*
* You're free to add application-wide styles to this file and they'll appear at the top of the
* compiled file, but it's generally better to create a new file per style scope.
*
*= require_self
*= require_tree .
*=require bootstrap
*/
我在boot / stylesheets中放置了bootstrap.css 我将dropdown.js放在vendor / javascripts /目录
中