Question 291655 in Html Question posted in
Some basic documentation can be found here.

Html – how can i add active class to image slider dynamically in Django template?

i have an image slider which does not show anything if the image does not have active class on it as it slides through a list of images.

{% for v in m.value.images %}<div class="carousel-item active"> <div class="container">
    <div class="carousel-caption">
      <h1>Another example headline.</h1> </div></div>{% endfor %}
Tags:

2

Answers


  1. 0

    It seems like you’re trying to create an image slider with a list of images. However, in your current code, all images are set to be active, which might not be the behavior you want.

    Usually, in a carousel, only one item should be active at a time. The active class should be added to the first item initially, and then it should be moved to the next item when the user interacts with the slider.

    Here’s an example of how you might modify your code:

    {% for v in m.value.images %}
<div class="carousel-item {% if forloop.first %}active{% endif %}">
  <div class="container">
    <div class="carousel-caption">
      <h1>Another example headline.</h1>
    </div>
  </div>
</div>
{% endfor %}

    In this code, the forloop.first condition checks if the current item is the first item in the loop. If it is, it adds the active class to that item. For all other items, no active class is added. This means that initially, only the first image will be displayed, and the others will be hidden. As the user interacts with the slider, the active class can be moved to the next item to display the next image.

    Login or Signup to reply.
  2. 0 
    <!-- Your HTML structure for the slider container -->
   <div class="slider-container">
     {% for v in m.value.images %}
         <img src="{{ v.image_url }}" alt="{{ v.image_alt }}" 
         class="slider-image {% if forloop.first %}active{% endif %}">
     {% endfor %}
   </div>

    In this code, the {% if forloop.first %}active{% endif %} part ensures that the "active" class is added only to the first image in the loop. The forloop variable in Django templates provides information about the current iteration of a loop. forloop.first is a boolean that is True for the first iteration of the loop and False for subsequent iterations.

    This way, when the page is loaded, the first image in the slider will have the "active" class, and the slider should display something even if the JavaScript is disabled or not used for this specific purpose.

    I suggest that you definitely read these articles about forloop in Django template tags in the future.
    https://docs.djangoproject.com/en/4.2/ref/templates/builtins/#:~:text=The%20for%20loop%20sets%20a%20number%20of%20variables%20available%20within%20the%20loop%3A

    https://www.w3schools.com/django/django_tags_for.php#:~:text=Run%20Example%20%C2%BB-,Loop%20Variables,-Django%20has%20some

    Login or Signup to reply.
Please signup or login to give your own answer.

Back To Top
Search