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CKEditor 4 reached its End of Life (EOL) in June 2023. From then on, it will receive no more updates, new features, bug fixes, and security patches. Visit CKEditor 5 Docs for the actively supported CKEditor or check Extended Support Model.
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Class

CKEDITOR.filter.disallowedContentRules

class since 4.4.0 abstract
See source

Virtual class representing the CKEDITOR.filter.disallow argument and a type of the CKEDITOR.config.disallowedContent option.

This is a simplified version of the CKEDITOR.filter.allowedContentRules type. Only the string format and object format are accepted. Required properties are not allowed in this format.

Read more in the Disallowed Content guide.

Filtering