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feature(carousel): carousel-item interval (#26667)

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adds the ability to assign data-interval to an individual carousel-item
This commit is contained in:
Christopher Morrissey 2018-09-18 08:55:48 -04:00 committed by XhmikosR
parent e604958641
commit ea0faadde5
3 changed files with 85 additions and 0 deletions
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8
js/src/carousel.js
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@ -385,6 +385,14 @@ const Carousel = (($) => {
$(activeElement).addClass(directionalClassName)
$(nextElement).addClass(directionalClassName)
const nextElementInterval = parseInt(nextElement.getAttribute('data-interval'), 10)
if (nextElementInterval) {
this._config.defaultInterval = this._config.defaultInterval || this._config.interval
this._config.interval = nextElementInterval
} else {
this._config.interval = this._config.defaultInterval || this._config.interval
}
const transitionDuration = Util.getTransitionDurationFromElement(activeElement)
$(activeElement)

48
js/tests/unit/carousel.js
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@ -445,6 +445,54 @@ $(function () {
$carousel.remove()
})
QUnit.test('should set interval from data attribute on individual carousel-item', function (assert) {
assert.expect(2)
var templateHTML = '<div id="myCarousel" class="carousel slide" data-interval="1814">' +
'<div class="carousel-inner">' +
'<div class="carousel-item active" data-interval="2814">' +
'<img alt="">' +
'<div class="carousel-caption">' +
'<h4>First Thumbnail label</h4>' +
'<p>Cras justo odio, dapibus ac facilisis in, egestas eget quam. Donec ' +
'id elit non mi porta gravida at eget metus. Nullam id dolor id nibh ' +
'ultricies vehicula ut id elit.</p>' +
'</div>' +
'</div>' +
'<div class="carousel-item" data-interval="3814">' +
'<img alt="">' +
'<div class="carousel-caption">' +
'<h4>Second Thumbnail label</h4>' +
'<p>Cras justo odio, dapibus ac facilisis in, egestas eget quam. Donec ' +
'id elit non mi porta gravida at eget metus. Nullam id dolor id nibh ' +
'ultricies vehicula ut id elit.</p>' +
'</div>' +
'</div>' +
'<div class="carousel-item">' +
'<img alt="">' +
'<div class="carousel-caption">' +
'<h4>Third Thumbnail label</h4>' +
'<p>Cras justo odio, dapibus ac facilisis in, egestas eget quam. Donec ' +
'id elit non mi porta gravida at eget metus. Nullam id dolor id nibh ' +
'ultricies vehicula ut id elit.</p>' +
'</div>' +
'</div>' +
'</div>' +
'<a class="left carousel-control" href="#myCarousel" data-slide="prev">&lsaquo;</a>' +
'<a class="right carousel-control" href="#myCarousel" data-slide="next">&rsaquo;</a>' +
'</div>'
var $carousel = $(templateHTML)
$carousel.appendTo('body')
$carousel.bootstrapCarousel(1)
assert.strictEqual($carousel.data('bs.carousel')._config.interval, 3814)
$carousel.remove()
$carousel.appendTo('body')
$carousel.bootstrapCarousel(2)
assert.strictEqual($carousel.data('bs.carousel')._config.interval, 1814, 'reverts to default interval if no data-interval is set')
$carousel.remove()
})
QUnit.test('should skip over non-items when using item indices', function (assert) {
assert.expect(2)
var templateHTML = '<div id="myCarousel" class="carousel" data-interval="1814">' +

29
site/docs/4.1/components/carousel.md
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@ -190,6 +190,35 @@ Add `.carousel-fade` to your carousel to animate slides with a fade transition i
{% endcapture %}
{% include example.html content=example %}
### Individual `.carousel-item` interval
Add `data-interval=""` to a `.carousel-item` to change the amount of time to delay between automatically cycling to the next item.
{% capture example %}
<div id="carouselExampleInterval" class="carousel slide" data-ride="carousel">
<div class="carousel-inner">
<div class="carousel-item active" data-interval="10000">
<img class="d-block w-100" data-src="holder.js/800x400?auto=yes&bg=777&fg=555&text=First slide" alt="First slide">
</div>
<div class="carousel-item" data-interval="20000">
<img class="d-block w-100" data-src="holder.js/800x400?auto=yes&bg=666&fg=444&text=Second slide" alt="Second slide">
</div>
<div class="carousel-item">
<img class="d-block w-100" data-src="holder.js/800x400?auto=yes&bg=555&fg=333&text=Third slide" alt="Third slide">
</div>
</div>
<a class="carousel-control-prev" href="#carouselExampleInterval" role="button" data-slide="prev">
<span class="carousel-control-prev-icon" aria-hidden="true"></span>
<span class="sr-only">Previous</span>
</a>
<a class="carousel-control-next" href="#carouselExampleInterval" role="button" data-slide="next">
<span class="carousel-control-next-icon" aria-hidden="true"></span>
<span class="sr-only">Next</span>
</a>
</div>
{% endcapture %}
{% include example.html content=example %}
## Usage