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In Drupal 7, I can do this in a custom field template to print the alt tag of an image:

<?php print $item['#item']['alt']; ?>

And though "item" seems to be a variable in Twig / drupal 8 fields, I can't seem to do the same thing. I've tried these:

{{ item.alt }}
{{ item.item.alt }}

These don't work but I don't get any errors either. Looking at the API does not give me much insight. I saw this gist but again, no alt tag rendered separately. My image is rendering the alt tag as i can see it in the code though.

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2 Answers 2

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The syntax to print the alt tag in that case is this:

{{ item['#item'].alt }}

Twig in Drupal 8 doesn't deal with hash keys like #item in render arrays cleanly. Part of the problem is that # signifies a comment in Twig, so {{ item.#item.alt }} wouldn't work.

There is the possibility of working around this with a Twig extension to allow drilling down into hash attributes with the syntax {{ item.item.alt }} but I'm not sure if anyone is working on that. I should mention that Twig extensions can be added in contrib as well.

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  • Thanks, that works great. I could not find any documentation in regard to this, is there any reference you can point me to?
    – Danny Englander
    Commented Dec 20, 2013 at 15:08
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    Things like this should probably be added under drupal.org/theme-guide/8 when they are specific to Twig + Drupal. I can see this potentially fitting in to drupal.org/node/1918824, maybe under Variables?
    – star-szr
    Commented Dec 20, 2013 at 15:18
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    See also drupal.org/node/2160611 :)
    – star-szr
    Commented Dec 20, 2013 at 15:54
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    I added this example to drupal.org/node/1918824, as suggested by @Cottser, and added a comment pointing to the core issue that he filed.
    – Ursula
    Commented Dec 20, 2013 at 18:52
  • On Drupal 8 {{ item['#item'].alt }} doesn’t work for me. Instead, other solution by @Hugo {{ item.content['#item'].alt }} is ok.
    – Sébastien Gicquel
    Commented Jun 13, 2018 at 12:28
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I achieved printing the alt attribute of my field using this line {{ item.content['#item'].alt }}

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