Custom Gutenberg Block - Styling and images no longer being imported correctly

strarsis · April 8, 2024, 1:38pm

This appears to be an issue with stylesheet-relative URLs or relative URLs in markup within the new iframe-based Gutenberg editor:

github.com/WordPress/gutenberg

Relative scheme images no longer display in the editor

opened 12:58AM - 08 Sep 23 UTC

peterwilsoncc

[Type] Bug [Block] Image

### Description In WordPress 6.3 and the current version of the Gutenberg plugi…n, 16.6.0, images with relative schemes are not displayed correctly in the block editor. On the front end they render as expected. In the editor, the images are shown as a broken image and -- browser dependent -- the alt text shown in it's place. ### Step-by-step reproduction instructions 1. Install WordPress 6.3 locally 2. In the wp-config file, define a relative content URL constant: `define( 'WP_CONTENT_URL', '//example.local/wp-content' );` 3. Create a post in the block editor 4. Insert an image block 5. Upload an image to the image block/library 6. The image fails to load 7. Preview the post in a new tab: the image does display 8. Switch to the code editor 9. Modify the image URL to include the scheme 10. Exit the code editor 11. The image now displays ### Screenshots, screen recording, code snippet **WordPress 6.3** (with and without the latest version of Gutenberg active) <img width="912" alt="Screen Shot 2023-09-08 at 10 48 42 am" src="https://github.com/WordPress/gutenberg/assets/519727/232b510b-1355-43a8-9e14-80db46bc8374"> **WordPress 6.2** (without Gutenberg active) <img width="917" alt="Screen Shot 2023-09-08 at 10 50 34 am" src="https://github.com/WordPress/gutenberg/assets/519727/e693b604-5cdd-4e96-baa3-9b01be629041"> ### Environment info - WordPress 6.3 - Browsers: Reproduced in Firefox, Safari and Chrome (all latest versions) - OS: macOS - Virtual machine: https://github.com/chassis/chassis on VirtualBox - Home URL: example.local - Site (WP) URL: example.local/wp (ie WordPress is running in [its own sub-directory](https://wordpress.org/documentation/article/giving-wordpress-its-own-directory/)) ### Please confirm that you have searched existing issues in the repo. Yes ### Please confirm that you have tested with all plugins deactivated except Gutenberg. Yes

https://github.com/WordPress/gutenberg/issues/31815