I added ckeditor_stylesheets: to my site's info.yml . When the link was - assets/css/main_pip.styles.css it didn't work. When I changed my stylesheet's name to main_pip.css and linked ckeditor_stylesheets: it to assets/css/main_pip.css it worked. I seems the extra period throws it off.

main_pip.styles.css - didn't work
main_pip.css - worked

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stevieegee created an issue. See original summary.

wim leers’s picture

wim leers
Location Ghent 🇧🇪🇪🇺
commented
Issue tags: +Needs tests

Hah, great find! To fix this, we'll first need a failing test that reproduces the problem. Do you think . you could do that?

stevieegee’s picture

stevieegee commented

Hi Wim, I have not written a test before but I have been meaning to learn! I am overwhelmed with work but if I this isn't super urgent I promise to work on this in a few weeks. Cheers, Steve

wim leers’s picture

wim leers
Location Ghent 🇧🇪🇪🇺
commented

No worries! I'm happy to help you do it.

Fortunately Drupal core already has a similar test, that you can use as an example to guide you. See \Drupal\Tests\ckeditor\Functional\CKEditorLoadingTest::testExternalStylesheets() (test) + core/modules/system/tests/themes/test_ckeditor_stylesheets_external/test_ckeditor_stylesheets_external.info.yml (the test theme used in that test).

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quietone’s picture

quietone commented
Project: Drupal core » CKEditor 4 - WYSIWYG HTML editor
Version: 9.4.x-dev » 1.0.x-dev
Component: ckeditor.module » Code

CKEditor has been removed from core, CKEditor 4 is removed from Drupal Core in 10.0.0