Problem/Motivation

CKEditor 5 (core module D9.3+) only works with filters, that declare they work with HTML formats. Therefore, the type of the filter needs to be changed to Drupal\filter\Plugin\FilterInterface::TYPE_TRANSFORM_IRREVERSIBLE

Steps to reproduce

Drupal 9.4
PHP: 8.1.7
Hash Tag Make v3.0.01

Administration > Configuration > Content authoring > Text formats and editors

Text Editor: (select) CKEditor 5

Enabled filters: (select) Hash Tag Make Filter

Error message
"CKEditor 5 only works with HTML-based text formats. The "Hash Tag Make Filter" (filter_hash_tag_make) filter implies this text format is not HTML anymore".

Proposed resolution

Drupal\filter\Plugin\FilterInterface::TYPE_TRANSFORM_IRREVERSIBLE

View:
Upgrade coordination for modules providing CKEditor 4 plugins
by Wim Leers:
https://www.drupal.org/docs/core-modules-and-themes/core-modules/ckedito...

Comments

B1 created an issue. See original summary.