Hook_h5p_styles_alter not working on first step of activity creation

Created on 8 September 2020, almost 5 years ago

Updated 25 July 2025, 18 days ago

I am able to assign a css file to the H5P editor iframe using hook_h5p_styles_alter through a module as documented in h5p.api.php. It works fine while editing or modifying an activity, but apparently it does not for the first step of the creation process, when asked to select a H5P activity type ("content type"). However, as soon as I click on one of them and its editor form loads, the css file is finally called and visible using the browser inspector for that iframe.

Once created, if I edit the activity everything works directly. That's why I point to the Activity Content Selector step.

I am not using conditions inside the hook:

function h5p_css_h5p_styles_alter(&$styles, $libraries, $mode) {
    $styles[] = (object) array(
      'path' => drupal_get_path('module', 'h5p_css') . '/css/h5p_css.css',
      'version' => '?ver=1',
    );
}

🐛 Bug report

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Active

Component

Code

Created by

🇪🇸Spain robegb

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styling

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Comment 18 days ago →
🇺🇸United States illeace
The documented purpose of hook_h5p_styles_alter() is to allow you to add additional styles to H5Ps. This first step of the creation process you describe is when the H5P hub is visible, but you have not yet selected which H5P type you'd like to use. Once you've selected a specific H5P, then that H5P is loaded and the Drupal module calls this hook so it can include any custom CSS you've specified. This seems like the intended behavior so I think this is working as designed.
Comment 4 days ago →
🇺🇸United States sim_1
Closing. Thank you!

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