How to make image of footer responsive to mobile devices? - html

Question

In my project I have footer with image as background.
I set it inside css. You can see it below. It looks nice only in big screen devices but ugly in mobile screen. How to make image responsive?
I don't have much experience in frontend and I would like to know what are the options?
I use bootstrap 4 by the way.
Here the link to jsfiddle.
/*
* START: Footer
*/
footer {
background: url('http://enjoyjumping.kz/static/img//footer.png') no-repeat;
background-size: 100% 100%;
width: 100%;
height: 500px;
bottom: 0;
position: absolute;
}
footer .row {
align-items: flex-end;
}
.flex-container {
display: flex;
flex-direction: column;
}
.flex-container > div {
width: 100px;
margin: 10px;
text-align: center;
line-height: 75px;
font-size: 30px;
}
.social {
display: flex;
justify-content: center;
flex-wrap: wrap;
}
.social__button {
display: block;
width: 70px;
height: 70px;
border-radius: 100%;
border-color: #fff;
position: relative;
cursor: pointer;
margin: 5px;
text-align: center;
}
.social__button i {
display: inline-block;
position: absolute;
left: 0;
top: 0;
height: 70px;
line-height: 70px;
width: 70px;
font-size: 30px;
z-index: 2;
transition: 0.3s;
color: black;
border: 2px solid;
border-radius: 100%;
}
.social__button i:hover {
color: white;
}
.copyright {
margin-bottom: 2.1rem !important;
font-size: 18px;
font-weight: bold;
}
.menu-link {
color: black !important;
font-weight: bold;
}
.menu-link-li {
margin: 10px;
}
.footer-menu {
margin-bottom: 0.7rem !important;
}
/*
* END: Footer
*/
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0/css/bootstrap.min.css" integrity="sha384-Gn5384xqQ1aoWXA+058RXPxPg6fy4IWvTNh0E263XmFcJlSAwiGgFAW/dAiS6JXm" crossorigin="anonymous">
<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/4.7.0/css/font-awesome.min.css">
<footer>
<div class="container-fluid h-100">
<div class="row h-100">
<div class="col-sm text-center footer-menu">
<ul class="list-unstyled">
<li class="menu-link-li">
<a class="menu-link no-underline text-uppercase" href="/about/">About Us</a>
</li>
<li class="menu-link-li">
<a class="menu-link no-underline text-uppercase" data-toggle="modal" data-target="#citiesModel" style="cursor: pointer;">Our clubs</a>
</li>
<li class="menu-link-li">
<a class="menu-link no-underline text-uppercase" href="/coaches/">News</a>
</li>
<li class="menu-link-li">
<a class="menu-link no-underline text-uppercase" href="/bonus/">Events</a>
</li>
</ul>
</div>
<div class="col-sm text-center">
<div class="flex-container">
<div class="w-100">
<div class="social">
<a href="#" class="social__button facebook">
<i class="fa fa-facebook"></i>
</a>
<a href="#" class="social__button instagram">
<i class="fa fa-instagram"></i>
</a>
<a href="#" class="social__button vk">
<i class="fa fa-vk"></i>
</a>
<a href="#" class="social__button youtube">
<i class="fa fa-youtube-play"></i>
</a>
</div>
</div>
<div class="w-100">
<span>+7(701)</span><strong>262-47-50</strong>
</div>
</div>
</div>
<div class="col-sm text-center">
<p class="copyright">Copyright © 2018 example.com</p>
</div>
</div>
</div>
</footer>

Answer 1

You need to change the background-size and background-position attributes of <footer>:
footer {
background: url('http://enjoyjumping.kz/static/img/footer.png') no-repeat top center /cover;
}
See it working: https://jsfiddle.net/7mejchb8/11/
Edit, based on comments: See this example on how to keep footer glued to the bottom of the page on all devices, while allowing it to have a variable height, without using position:absolute: https://jsfiddle.net/websiter/d4n1sxop/
CSS behind it is:
body {
min-height: 100vh;
margin: 0;
padding: 0;
display: flex;
flex-direction: column;
}
header {
flex-grow: 0;
}
main {
flex-grow: 1;
}
footer {
flex-grow: 0;
display: flex;
flex-direction: column;
justify-content: flex-end;
min-height: 500px;
}