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The following code does not work:

<div class="topics"><a class="use-ajax" data-dialog-type="modal" href="/topics-listing">All Topics</a></div>

Drupal 8.6.5. Bootstrap subtheme. Chrome console log shows no errors. Rather than a modal, the referenced page opens.

So, how do you create a link to a modal dialog in Drupal 8?

2

This html looks ok, but did you include the core/drupal.dialog.ajax js library that attach event to your link ?

In twig :

{{ attach_library('core/drupal.dialog.ajax') }}

In PHP, it looks like this :

$renderArray = [
            '#title' => t('All Topics'),
            '#type' => 'link',
            '#url' => Url::fromRoute('XXX'),
            '#attributes' => [
                'class' => ['use-ajax'],
                'data-dialog-type' => 'modal',
            ],
            '#attached' => [
                'library' => ['core/drupal.dialog.ajax'],
            ],
];
  • Can you suggest which twig file and where in that file to place the attach_library, please? Thanks, Oulalahakabu – dkrockville Jan 7 at 18:39
  • Activate debug:true from twig.config in services.yml, then you can explore html produced by drupal 8 with your browser and see which twig files are used. You can attach this library anywhere it is usefull. Note I'm not sure using attach_library is the best practice, – Oulalahakabu Jan 8 at 6:40

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