Alt text missing on lightbox images

Hi heatherwoz, I checked Responsive image with Content Type > Media (multiple values) > Image field and description is working:

But you are right, I cloned Colorbox module and moved 'data-gbox-img-attributes' instead of 'data-cbox-img-attributes' from Colorbox:

GLightbox uses data-glightbox attribute with 'title' and 'description' values:

https://github.com/biati-digital/glightbox?tab=readme-ov-file#examples

I need to know your struction of content type, images can be in different nested entity types, for example:
Content type > Paragraph field > Media > Image
Content type > Paragraph field (gallery) > Pagraph field (gallery item) > Media > Image
Content type > Paragraph field > Image
Content type > Paragraph field (gallery) > Pagraph field (gallery item) > Image

It's impossible to predict all possible structures and nested levels for images, so I fetched few most common structures for captions.
https://www.drupal.org/project/glightbox/issues/3487478 📌 Allow caption tokens from parent (paragraph entity) Active
https://www.drupal.org/project/glightbox/issues/3511270 🐛 Allow caption tokens paragraph access if there is a parent paragraph Active
https://www.drupal.org/project/glightbox/issues/3492657 📌 Create a service for caption calculation Active

If you describe your structure, I will add your case as well.

Thanks for your reply.

The caption and description are working. It is the `alt` attribute on the `img` tag that is missing. I expect it to be there for accessibility. Someone could create a light box that does not include captions or descriptions, and assistive technology would need alt text to describe the image.

Our particular case is Custom Block > Media > Image.

I am also experiencing the issue where ALT text is not displaying for an image that has ALT text. In my use case, I am using it in Drupal 10 Gutenberg editor for core and custom Gutenberg blocks.

I tried adding glightbox via contrib module and installing glightbox manually via my custom Gutenberg blocks library. No ALT text for images that have ALT text.

Hi heatherwoz, albertho425, I added data-alt attribute in links with text from Caption. I'm not sure if you need additional separate field for alt attribute. Usually it should be enough to have something meaningful in alt="" attribute. And I removed aria-label from tag, it's not button or , so "title" attribute is enough for that. You can try dev version of the module or I will add a new module version later on this week.

Thanks @levmyshkin

That solution doesn't work for us, because captions are optional, and sometimes users don't enter them. They are also highly configurable by this module.

I think a better approach is to use the alt text from the image itself. Drupal includes an alt text field on its image fields, so we can reasonably expect this to be filled out. I have opened an MR to show what I am thinking. I also removed all the references to $data-gbox-img-attributes since that is not used with GLightbox the same way it was with Colorbox.

Thanks @levmyshkin and @heatherwoz. I agree with Heather of using the ALT text from the image itself. In my case, images in Gutenberg are required for saving.

Hi heatherwoz, albertho425, thank you for your MR! I merged it and released Glightbox 1.0.18:
https://www.drupal.org/project/glightbox/releases/1.0.18 →

It looks fine for me:
https://drupalbook.org/ept/demo/video-and-image-gallery
https://drupalbook.org/ept/demo/image-gallery

Thanks for the prompt response! I will try out the new release and open a new issue if we encounter any problems.

Thank you both. We'll try it on Sunday and submit a new ticket if we encounter any issues. Thanks.