Currently Carousel and Carousel item patterns are not site buidable because for example when using a paragraph field to handle the carousel items. in the carousel pattern:
<div class="carousel-inner">
{% for slide in slides %}
{% if loop.first and slide is iterable %}
{#
There is currently no recursive merge in Twig or Drupal core Twig.
So it may breaks if the slide already have #attributes.
#}
{% set slide = slide|merge({'#attributes': {'class': ['active']}}) %}
{% endif %}
{{ slide }}
{% endfor %}
</div>
This will add the "active" class on the entity wrapper. Whereas the carousel-item class will be inside this entity wrapper. And the Bootstrap component needs the active class to be on the same element as the carousel-item one.
In pattern-carousel.html.twig:
<div class="carousel-inner">
{% for slide in slides %}
{% if loop.first and slide is iterable %}
{#
There is currently no recursive merge in Twig or Drupal core Twig.
So it may breaks if the slide already have #attributes.
#}
{% set slide = slide|merge({'#attributes': {'class': ['carousel-item', 'active']}}) %}
{% elseif slide is iterable %}
{% set slide = slide|merge({'#attributes': {'class': ['carousel-item']}}) %}
{% endif %}
{{ slide }}
{% endfor %}
</div>
In pattern-carousel-item.html.twig:
<div{{ attributes }}>
{{ image }}
{% if caption %}
<div class="carousel-caption">
{{ caption }}
</div>
{% endif %}
</div>
Fixed
5.0
User interface
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Issue #3335307 by Grimreaper: Site building: update Carousel and...
Automatically closed - issue fixed for 2 weeks with no activity.