topic Re: Handling Alt Text for Dynamic Images in ArcGIS Experience Builder Questions

Handling Alt Text for Dynamic Images

ZachBodenner — Mon, 27 Jul 2026 14:32:18 GMT

This one might not have an actual Solution right now, so consider this a discussion: How are you applying alt text to images in Experience Builder that get dynamically rendered from either attachments or links, etc? An example: I have an app where selecting a feature on the page triggers an Image widget to show an photo from a link.

Dynamically populating alt text is difficult - alt text should be an actual description of what appears in the image. The best thing I can do right now is something like this:

Technically, it meets ADA standards but it's pretty unsatisfying and less than helpful for someone who a sight impairment. Has anyone else found a better way to handle this situation?

Re: Handling Alt Text for Dynamic Images

LReis — Mon, 27 Jul 2026 15:15:02 GMT

Is it feasible for you to add a separate field for the alt text in your table/feature class, in the same way that you have the URL for the image? I think this would be the easiest way for you to get what you are looking for. Then you could choose "Attribute" for the alt text and select that field, rather than calculating an expression. This worked with some test data that I created.

Re: Handling Alt Text for Dynamic Images

ZachBodenner — Mon, 27 Jul 2026 15:21:54 GMT

That's a good idea that would work in this case, but not all. Namely, if it's an attachment instead of a link, that wouldn't really work since the actual attributes of the attachment table aren't exposed in those selectors.

Re: Handling Alt Text for Dynamic Images

MichaelVolz — Mon, 27 Jul 2026 17:23:18 GMT

Just adding my thoughts here with a custom print service, as the same issue occurs there. Any image created from the custom print service is not ADA compliant. The idea of intercepting the image after creation and populating alt text sounds like it would require advanced programming skills since this option is not provided out-of-the-box.

Re: Handling Alt Text for Dynamic Images

LReis — Mon, 27 Jul 2026 17:27:51 GMT

I would be curious to hear more about your imagined use case for an attachment as the linked image, and if that would include the possibility of choosing between multiple attached images for a single item in a table/feature class. If it's a single attached image, the same idea could be used, where you could include a field that has the alt text for that image.

Re: Handling Alt Text for Dynamic Images

ZachBodenner — Mon, 27 Jul 2026 19:43:58 GMT

I mean that kind of happens all the time. I have another application where we've got park polygons with multiple professional photographs of the park attached. It would be nice to be able to apply dynamic text to each of them so I don't need to pick just one and do one of the workarounds discussed so far.