How to smooth transition between elements of different heights in Bootstrap carousel
Question
I am building a Bootstrap carousel for a project. The content of the slides have different heights. Currently, the transition animation for the different sized content is very choppy. I am wondering if there is any way to fix this transition and make it a bit more graceful/smooth as the carousel adjusts in height between the slides.
*Please note that I would like to maintain the different heights between the slides. They are sized that way for a reason that is essential to the project.
Please see an example of the choppy transition on JS Bin.
Here is the code for the carousel:
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width">
<title>Bootstrap Carousel</title>
<!-- Latest compiled and minified CSS -->
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css" integrity="sha384-BVYiiSIFeK1dGmJRAkycuHAHRg32OmUcww7on3RYdg4Va+PmSTsz/K68vbdEjh4u" crossorigin="anonymous">
<!-- Optional theme -->
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap-theme.min.css" integrity="sha384-rHyoN1iRsVXV4nD0JutlnGaslCJuC7uwjduW9SVrLvRYooPp2bWYgmgJQIXwl/Sp" crossorigin="anonymous">
<!-- jQuery -->
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.1.1/jquery.min.js"></script>
<!-- Latest compiled and minified JavaScript -->
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.js" integrity="sha384-Tc5IQib027qvyjSMfHjOMaLkfuWVxZxUPnCJA7l2mCWNIpG9mGCD8wGNIcPD7Txa" crossorigin="anonymous"></script>
</head>
<body>
<div id="carousel-example-generic" class="carousel slide" data-ride="carousel">
<!-- Indicators -->
<ol class="carousel-indicators">
<li data-target="#carousel-example-generic" data-slide-to="0" class="active"></li>
<li data-target="#carousel-example-generic" data-slide-to="1"></li>
<li data-target="#carousel-example-generic" data-slide-to="2"></li>
</ol>
<!-- Wrapper for slides -->
<div class="carousel-inner" role="listbox">
<div class="item active">
<img style="margin: 0 auto;" src="http://placehold.it/300x300">
</div>
<div class="item">
<img style="margin: 0 auto;" src="http://placehold.it/250x250">
</div>
<div class="item">
<img style="margin: 0 auto;" src="http://placehold.it/160x600">
</div>
</div>
<!-- Controls -->
<a class="left carousel-control" href="#carousel-example-generic" role="button" data-slide="prev">
<span class="glyphicon glyphicon-chevron-left" aria-hidden="true"></span>
<span class="sr-only">Previous</span>
</a>
<a class="right carousel-control" href="#carousel-example-generic" role="button" data-slide="next">
<span class="glyphicon glyphicon-chevron-right" aria-hidden="true"></span>
<span class="sr-only">Next</span>
</a>
</div>
</body>
</html>
3 answers
solution1
3 ACCPTED 2017-01-13 03:45:42
It was chopping a lot because of the translation left/right so if u remove it it should be a lot better.
.carousel-inner .item {
opacity: 0;
transition: none;
transform: translate3d(0,0,0) !important;
}
.carousel-inner .active {
transition: opacity 1s ease-in-out;
opacity: 1;
}
but if u meant animate the height between different image sizes than u can use this jQuery:
$('.carousel').carousel().on('slide.bs.carousel', function (e) {
var nextH = $(e.relatedTarget).height();
$(this).find('.active.item').parent().animate({
height: nextH
}, 1000);
});
solution2
1 2017-01-13 04:23:29
Another way you can use javascript to done that.
In that code I add event listener for listen slide.bs.carousel that triggered from bootstrap, get height of active item then animate carousel-inner element height.
solution3
1 2017-01-13 04:25:55
<div class="item active">
<div class="img" style="background-image:url('http://placehold.it/300x300')"></div>
</div>
<div class="item">
<div class="img" style="background-image:url('http://placehold.it/250x250')"></div>
</div>
<div class="item">
<div class="img" style="background-image:url('http://placehold.it/160x600')"></div>
</div>
Add style
.item .img {
height:600px; //Maximum height
background-repeat:no-repeat;
background-position:center center;
}
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