Description

After the stabilization of LinkControl in Gutenberg 19.9 (included in WordPress 6.8) , the deprecated export __experimentalLinkControl throws the following error when accessing DEFAULT_LINK_SETTINGS:

Uncaught TypeError: d.__experimentalLinkControl.DEFAULT_LINK_SETTINGS is not iterable

Using the stabilized LinkControl directly does not cause any issues. However, this can break any custom blocks that still rely on __experimentalLinkControl.

Step-by-step reproduction instructions

1. Add any custom block that uses __experimentalLinkControl and access DEFAULT_LINK_SETTINGS
   or update the default button block
   

   gutenberg/packages/block-library/src/button/edit.js

   Line 40 in b17d1ca

   LinkControl,

   
   to previously used __experimentalLinkControl

__experimentalLinkControl as LinkControl,

2. Confirm the block shows the message This block has encountered an error and cannot be previewed. and the console logs the error Uncaught TypeError: d.__experimentalLinkControl.DEFAULT_LINK_SETTINGS is not iterable.

Screenshots, screen recording, code snippet

No response

Environment info

• Gutenberg trunk

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

Please confirm which theme type you used for testing.

• Block
• Classic
• Hybrid (e.g. classic with theme.json)
• Not sure