ckeditor5_pre

This module adds support for the <pre> tag and makes it available in the editor's Heading list.

When you apply <pre> to text, basic visual styling such as a monospace font and a background is displayed in the editor to indicate preformatted content

Configuration:

After enabling the module, <pre> is automatically added to the Heading section of the editor.

However, if your text format has "Limit allowed HTML tags and correct faulty HTML" enabled (for example, Basic HTML), you need to re-save the text format settings. This ensures that <pre> is automatically added to the Allowed HTML tags list.

Limitations:

The module works reliably as long as the <pre> tag does not contain nested elements. Wrapping plain text or single-level tags (such as <p> or<h3>) behaves as expected. However, wrapping multiple block-level elements or deeply nested tags may produce unexpected results.

Documentation:

https://www.drupal.org/docs/extending-drupal/contributed-modules/contrib...