Schema | CKEditor 5 Framework Documentation
Schema rules can be defined by using the Schema#register() or the Schema#extend() methods. The former can be used only once for a given item name which ensures that only a single …
Heading and List Plugin are conflicting with each other. #3015
CKEditor 5 Heading and List Plugin are conflicting with each other and resulting into an error. CKEditorError: "schema-cannot-register-item-twice: A single item cannot be registered twice in …
Configuration Examples — RTE by CKEditor main documentation - TYPO3
Oct 17, 2025 · With CKEditor 5 the plugin architecture has changed and CKEditor 4 plugins are not compatible with CKEditor 5. It is advised to read the CKEditor 4 to 5 migration to …
Caption element being stripped [#3528625] | Drupal.org
Jun 5, 2025 · We can't register the caption element because it's already registered by another plugin, and give the error: CKEditorError: schema-cannot-register-item-twice …
TYPO3 CKEditor anpassen – Toolbar, Presets & Plugins - T3Planet
Jan 12, 2023 · Der weltweit beliebteste CKEditor wurde in TYPO3 integriert, und das war eine der großen Entscheidungen. Hier möchte ich von der einfachen bis zur fortgeschrittenen Ebene …
How to create a custom CKEditor 5 plugin for TYPO3 12.4
May 5, 2023 · In case of CKEditor in TYPO3, it is possible to dynamically include custom plugins, allowing you to extend the functionality of the editor to meet your specific needs. In this article, …
Cannot extend an item which was not registered yet
Apr 8, 2020 · Read more: https://ckeditor.com/docs/ckeditor5/latest/framework/guides/support/error-codes.html#error …
Class Schema (engine/model/schema~Schema) | CKEditor 5 API …
It defines the allowed and disallowed structures of nodes as well as nodes' attributes. The schema is usually defined by the features and based on them, the editing framework and features …
ckeditor5/packages/ckeditor5-engine/docs/framework/deep-dive/schema…
Defining allowed structures When a feature introduces a model element, it should register it in the schema. Besides defining that such an element may exist in the model, the feature also needs …
How to allow custom HTML tags in the CKEditor 5 of TYPO3 12?
May 10, 2023 · According to the changelog, the CKEditor 5 plugin "GeneralHTMLSupport" is available in TYPO3 12. I guess it can be activated in the own editor configuration (yaml):
Schema - CKEditor 5 Documentation
Schema rules can be defined by using the Schema#register () or Schema#extend () methods. The former can be used only once for a given item name which ensures that only a single editing …
rte_ckeditor full.yaml erweitern in Typo3_12.5.7 - TYPO3 Forum
In Typo3 9.5.31 hatte ich in /typo3/sysext/rte_ckeditor/Configuration/RTE/ die Datei full.yaml einfach durch die erweiterte Datei komplett.yaml ersetzt mit einem erweiterten Umfang …