问题
I am just learing and i've come across a problem. I'd like burger icon to work, but it doesn't work. ----> https://getbootstrap.com/docs/4.5/examples/album/# It doesn't collapse.
I add
gem 'jquery-rails'
to gemfile and then type bundle update it installed jquery
Fetching jquery-rails 4.4.0 Installing jquery-rails 4.4.0
then i added
<%= stylesheet_link_tag 'application', media: 'all' %>
<%= javascript_include_tag 'application' %>
to the application.html.erb and the script below
<script src="https://code.jquery.com/jquery-3.5.1.slim.min.js" integrity="sha384-DfXdz2htPH0lsSSs5nCTpuj/zy4C+OGpamoFVy38MVBnE+IbbVYUew+OrCXaRkfj" crossorigin="anonymous"></script>
<script>window.jQuery || document.write('<script src="/docs/4.5/assets/js/vendor/jquery.slim.min.js"><\/script>')</script><script src="/docs/4.5/dist/js/bootstrap.bundle.min.js" integrity="sha384-ho+j7jyWK8fNQe+A12Hb8AhRq26LrZ/JpcUGGOn+Y7RsweNrtN/tE3MoK7ZeZDyx" crossorigin="anonymous"></script>
from bootstrap example website and it doesn't work, what do I do wrong?
/ application.html.erb
<!DOCTYPE html>
<html>
<head>
<title>AlbumSite</title>
<%= csrf_meta_tags %>
<link rel="canonical" href="https://getbootstrap.com/docs/4.5/examples/album/">
<%= stylesheet_link_tag 'https://stackpath.bootstrapcdn.com/bootstrap/4.5.2/css/bootstrap.min.css' %>
<%= stylesheet_link_tag 'application', media: 'all' %>
<%= javascript_include_tag 'application' %>
<style>
.jumbotron {
padding-top: 3rem;
padding-bottom: 3rem;
margin-bottom: 0;
background-color: #fff;
}
@media (min-width: 768px) {
.jumbotron {
padding-top: 6rem;
padding-bottom: 6rem;
}
}
.jumbotron p:last-child {
margin-bottom: 0;
}
.jumbotron h1 {
font-weight: 300;
}
.jumbotron .container {
max-width: 40rem;
}
footer {
padding-top: 3rem;
padding-bottom: 3rem;
}
footer p {
margin-bottom: .25rem;
}
.bd-placeholder-img {
font-size: 1.125rem;
text-anchor: middle;
-webkit-user-select: none;
-moz-user-select: none;
-ms-user-select: none;
user-select: none;
}
@media (min-width: 768px) {
.bd-placeholder-img-lg {
font-size: 3.5rem;
}
}
</style>
</head>
<body>
<header>
<div class="collapse bg-dark" id="navbarHeader">
<div class="container">
<div class="row">
<div class="col-sm-8 col-md-7 py-4">
<h4 class="text-white">About</h4>
<p class="text-muted">Add some information about the album below, the author, or any other background context. Make it a few sentences long so folks can pick up some informative tidbits. Then, link them off to some social networking sites or contact information.</p>
</div>
<div class="col-sm-4 offset-md-1 py-4">
<h4 class="text-white">Contact</h4>
<ul class="list-unstyled">
<li><a href="#" class="text-white">Follow on Twitter</a></li>
<li><a href="#" class="text-white">Like on Facebook</a></li>
<li><a href="#" class="text-white">Email me</a></li>
</ul>
</div>
</div>
</div>
</div>
<div class="navbar navbar-dark bg-dark shadow-sm">
<div class="container d-flex justify-content-between">
<a href="<%= home_path %>" class="navbar-brand d-flex align-items-center">
<svg xmlns="http://www.w3.org/2000/svg" width="20" height="20" fill="none" stroke="currentColor" stroke-linecap="round" stroke-linejoin="round" stroke-width="2" aria-hidden="true" class="mr-2" viewBox="0 0 24 24" focusable="false"><path d="M23 19a2 2 0 0 1-2 2H3a2 2 0 0 1-2-2V8a2 2 0 0 1 2-2h4l2-3h6l2 3h4a2 2 0 0 1 2 2z"/><circle cx="12" cy="13" r="4"/></svg>
<strong>Album</strong>
</a>
<button class="navbar-toggler" type="button" data-toggle="collapse" data-target="#navbarHeader" aria-controls="navbarHeader" aria-expanded="false" aria-label="Toggle navigation">
<span class="navbar-toggler-icon"></span>
</button>
</div>
</div>
</header>
<main role="main">
<section class="jumbotron text-center">
<div class="container">
<h1>Simple album</h1>
<p class="lead text-muted">Something short and leading about the collection below—its contents, the creator, etc. Make it short and sweet, but not too short so folks don’t simply skip over it entirely.</p>
<p>
<a href="<%= new_post_path %>" class="btn btn-primary my-2">Add a new album</a>
</p>
</div>
</section>
<%= yield %>
<script src="https://code.jquery.com/jquery-3.5.1.slim.min.js" integrity="sha384-DfXdz2htPH0lsSSs5nCTpuj/zy4C+OGpamoFVy38MVBnE+IbbVYUew+OrCXaRkfj" crossorigin="anonymous"></script>
<script>window.jQuery || document.write('<script src="/docs/4.5/assets/js/vendor/jquery.slim.min.js"><\/script>')</script><script src="/docs/4.5/dist/js/bootstrap.bundle.min.js" integrity="sha384-ho+j7jyWK8fNQe+A12Hb8AhRq26LrZ/JpcUGGOn+Y7RsweNrtN/tE3MoK7ZeZDyx" crossorigin="anonymous"></script>
</body>
</html>/ javascripts' folder -> application.js
// This is a manifest file that'll be compiled into application.js, which will include all the files
// listed below.
//
// Any JavaScript/Coffee file within this directory, lib/assets/javascripts, or any plugin's
// vendor/assets/javascripts directory can be referenced here using a relative path.
//
// It's not advisable to add code directly here, but if you do, it'll appear at the bottom of the
// compiled file. JavaScript code in this file should be added after the last require_* statement.
//
// Read Sprockets README (https://github.com/rails/sprockets#sprockets-directives) for details
// about supported directives.
//
//= require rails-ujs
//= require turbolinks
//= require_tree .来源：https://stackoverflow.com/questions/64354413/ruby-on-rails-jquery-how-to-use