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How to change interval of a bootstrap carousel once it has been initialised

According to the doco, using the following will set the carousel cycle speed:

$('.carousel').carousel({
  interval: 2000
})

However if you have already initialised the carousel, calling the above with a different interval has no effect.

I should note that initialising the carousel via JS doesn't set the data-interval on the carousel. I've also searched quite a bit on this topic, but the results are all about people trying to set up at a fixed speed. I want to change the speed once it's already been initialised.

The code is as follows:

$(function () {
    $('#homeCarousel').carousel({
        interval:2000,
        pause: "false"
    });
    $('#slowButton').click(function () {
        $('#homeCarousel').carousel({interval: 10000});
    });
    $('#fastButton').click(function () {
        $('#homeCarousel').carousel({interval: 1000});
    });
});
#carouselButtons {
    margin-left: 100px;
    position: absolute;
    bottom: 0px;
}

.item {
    color: white;
    background-color: black;
    width:100%;
    height: 350px;
}
<link href="http://netdna.bootstrapcdn.com/bootstrap/3.0.0/css/bootstrap.min.css" rel="stylesheet"/>
<link href="http://netdna.bootstrapcdn.com/font-awesome/3.2.1/css/font-awesome.min.css" rel="stylesheet"/>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<script src="http://netdna.bootstrapcdn.com/bootstrap/3.0.0/js/bootstrap.min.js"></script>
<!-- Carousel -->
<div id="homeCarousel" class="carousel slide">
  <!-- Menu -->
  <ol class="carousel-indicators">
    <li data-target="#myCarousel" data-slide-to="0" class="active"></li>
    <li data-target="#myCarousel" data-slide-to="1"></li>
    <li data-target="#myCarousel" data-slide-to="2"></li>
  </ol>
    
  <!-- Items -->
  <div class="carousel-inner">
      
      <!-- Item 1 -->
    <div class="item active">
      <div class="container">
        <div class="carousel-caption">
          <h1>Bootstrap 3 Carousel Layout</h1>
          <p>This is an example layout with carousel that uses the Bootstrap 3 styles.</p>
          <p><a class="btn btn-lg btn-primary" href="http://getbootstrap.com">Learn More</a>
        </p></div>
      </div>
    </div>
      
      <!-- Item 2 -->
    <div class="item">
      <div class="container">
        <div class="carousel-caption">
          <h1>Changes to the Grid</h1>
          <p>Bootstrap 3 still features a 12-column grid, but many of the CSS class names have completely changed.</p>
          <p><a class="btn btn-large btn-primary" href="#">Learn more</a></p>
        </div>
      </div>
    </div>
      
      <!-- Item 3 -->
    <div class="item">
      <div class="container">
        <div class="carousel-caption">
          <h1>Percentage-based sizing</h1>
          <p>With "mobile-first" there is now only one percentage-based grid.</p>
          <p><a class="btn btn-large btn-primary" href="#">Browse gallery</a></p>
        </div>
      </div>
    </div>
  </div>
  <!-- Controls -->
  <a class="left carousel-control" href="#myCarousel" data-slide="prev">
    <span class="icon-prev"></span>
  </a>
  <a class="right carousel-control" href="#myCarousel" data-slide="next">
    <span class="icon-next"></span>
  </a>  
  <div id="carouselButtons">
      <button id="slowButton" type="button" class="btn btn-default btn-xs">
          <span class="glyphicon glyphicon-play"></span>
       </button>
      <button id="fastButton" type="button" class="btn btn-default btn-xs">
          <span class="glyphicon glyphicon-forward"></span>
      </button>
  </div>
</div>
like image 665
Metalskin Avatar asked May 16 '15 01:05

Metalskin


People also ask

How do I change the interval of carousel in Bootstrap?

You can simply use the data-interval attribute of the carousel class. It's default value is set to data-interval="3000" i.e 3seconds. All you need to do is set it to your desired requirements.

How do you change the transition duration of a carousel component?

The transition duration of . carousel-item can be changed with the $carousel-transition-duration Sass variable before compiling or custom styles if you're using the compiled CSS. If multiple transitions are applied, make sure the transform transition is defined first (eg. transition: transform 2s ease, opacity .

How do I stop carousel interval?

Use the [interval]="'0'" input. This will disable the auto-sliding feature. Here's the link to the Carousel Documentation.


2 Answers

It's not a supported option to modify speed once the carousel is initialized. However, that doesn't mean that it cannot be done. Here is some sample code that enables you to change the options on the fly, including the interval


$(function () {
    $('#homeCarousel').carousel({
        interval:2000,
        pause: "false"
    });
    $('#slowButton').click(function () {
      c = $('#homeCarousel')
      opt = c.data()['bs.carousel'].options
      opt.interval= 10000;
      c.data({options: opt})
    });
    $('#fastButton').click(function () {
      c = $('#homeCarousel')
      opt = c.data()['bs.carousel'].options
      opt.interval= 1000;
      c.data({options: opt})
    });
});
#carouselButtons {
    margin-left: 100px;
    position: absolute;
    bottom: 0px;
}

.item {
    color: white;
    background-color: black;
    width:100%;
    height: 350px;
}
<link href="http://netdna.bootstrapcdn.com/bootstrap/3.0.0/css/bootstrap.min.css" rel="stylesheet"/>
<link href="http://netdna.bootstrapcdn.com/font-awesome/3.2.1/css/font-awesome.min.css" rel="stylesheet"/>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<script src="http://netdna.bootstrapcdn.com/bootstrap/3.0.0/js/bootstrap.min.js"></script>
<!-- Carousel -->
<div id="homeCarousel" class="carousel slide">
  <!-- Menu -->
  <ol class="carousel-indicators">
    <li data-target="#myCarousel" data-slide-to="0" class="active"></li>
    <li data-target="#myCarousel" data-slide-to="1"></li>
    <li data-target="#myCarousel" data-slide-to="2"></li>
  </ol>
    
  <!-- Items -->
  <div class="carousel-inner">
      
      <!-- Item 1 -->
    <div class="item active">
      <div class="container">
        <div class="carousel-caption">
          <h1>Bootstrap 3 Carousel Layout</h1>
          <p>This is an example layout with carousel that uses the Bootstrap 3 styles.</p>
          <p><a class="btn btn-lg btn-primary" href="http://getbootstrap.com">Learn More</a>
        </p></div>
      </div>
    </div>
      
      <!-- Item 2 -->
    <div class="item">
      <div class="container">
        <div class="carousel-caption">
          <h1>Changes to the Grid</h1>
          <p>Bootstrap 3 still features a 12-column grid, but many of the CSS class names have completely changed.</p>
          <p><a class="btn btn-large btn-primary" href="#">Learn more</a></p>
        </div>
      </div>
    </div>
      
      <!-- Item 3 -->
    <div class="item">
      <div class="container">
        <div class="carousel-caption">
          <h1>Percentage-based sizing</h1>
          <p>With "mobile-first" there is now only one percentage-based grid.</p>
          <p><a class="btn btn-large btn-primary" href="#">Browse gallery</a></p>
        </div>
      </div>
    </div>
  </div>
  <!-- Controls -->
  <a class="left carousel-control" href="#myCarousel" data-slide="prev">
    <span class="icon-prev"></span>
  </a>
  <a class="right carousel-control" href="#myCarousel" data-slide="next">
    <span class="icon-next"></span>
  </a>  
  <div id="carouselButtons">
      <button id="slowButton" type="button" class="btn btn-default btn-xs">
          <span class="glyphicon glyphicon-play"></span>
       </button>
      <button id="fastButton" type="button" class="btn btn-default btn-xs">
          <span class="glyphicon glyphicon-forward"></span>
      </button>
  </div>
</div>
like image 74
Adnan Y Avatar answered Oct 19 '22 03:10

Adnan Y


Using the Bootstrap 4 carousel you can get a reference to its internal configuration and directly setting the interval like this:

const options = $("#myCcarousel").data()['bs.carousel']["_config"];
options.interval = 50;

Needless to say this is pretty hacky.

like image 33
Emiel Koning Avatar answered Oct 19 '22 03:10

Emiel Koning