Utilizing bootstrap jumptron with a background image has led to an issue where the background image disappears as I scroll down, leaving only the jumptron div class displaying the heading. How can this be fixed so that the image remains visible even when scrolling? The rest of the content works properly. For more detailed information, refer to the following files located in a Rails 5 app.
index.html.erb
<div class="bg"></div>
<div class="jumbotron">
<h1>Organize and Mobilize</h1>
</div>
<div class="container">
<div class="row">
<h2>We need you to take action</h2>
Lorem ipsum dolor sit amet, consectetur adipiscing elit...
<br>
...Aliquam in felis sit amet augue.
</div>
<hr>
<div class="row">
<h2>Page Content</h2>
Lorem ipsum dolor sit amet, consectetur adipiscing elit...
<h2>Page Content</h2>
...
</div>
<hr>
<div class="row">
<h2>Page Content</h2>
Lorem ipsum dolor sit amet, consectetur adipiscing elit...
</div>
</div>
<hr>
<div class="container">
<div class="row">
<div class="col-md-12 text-center"><p>The End.</p></div>
</div>
</div>bootstrap_and_overrides.css
/*
=require twitter-bootstrap-static/bootstrap
Static version of css will use Glyphicons sprites by default
=require twitter-bootstrap-static/sprites
*/
body { padding-top: 50px; }
.bg {
background: url('protest.jpg') no-repeat center center;
position: fixed;
width: 100%;
height: 450px; /*same height as jumbotron */
top:0;
left:0;
z-index: -1;
}
.jumbotron {
margin-bottom: 50px;
height: 350px;
color: white;
text-shadow: black 0.3em 0.3em 0.3em;
background:transparent;
}and cable.js
// Action Cable provides the framework to deal with WebSockets in Rails.
// You can generate new channels where WebSocket features live using the rails generate channel command.
//
//= require action_cable
//= require_self
//= require_tree ./channels
(function() {
this.App || (this.App = {});
App.cable = ActionCable.createConsumer();
}).call(this);
var jumboHeight = $('.jumbotron').outerHeight();
function parallax(){
var scrolled = $(window).scrollTop();
$('.bg').css('height', (jumboHeight-scrolled) + 'px');
}
$(window).scroll(function(e){
parallax();
});https://i.stack.imgur.com/CZYaP.png
This is the image before I scroll the page: https://i.stack.imgur.com/Vp69F.jpg