Cherry-pick "LibWeb: Implement stub for ElementInternals" #24591
Add this suggestion to a batch that can be applied as a single commit.
This suggestion is invalid because no changes were made to the code.
Suggestions cannot be applied while the pull request is closed.
Suggestions cannot be applied while viewing a subset of changes.
Only one suggestion per line can be applied in a batch.
Add this suggestion to a batch that can be applied as a single commit.
Applying suggestions on deleted lines is not supported.
You must change the existing code in this line in order to create a valid suggestion.
Outdated suggestions cannot be applied.
This suggestion has been applied or marked resolved.
Suggestions cannot be applied from pending reviews.
Suggestions cannot be applied on multi-line comments.
Suggestions cannot be applied while the pull request is queued to merge.
Suggestion cannot be applied right now. Please check back later.
This implements a stub ElementInternals object which implements the shadowRoot getter only.
Also implement attachInternals function.
(cherry picked from commit a65f1ecc375fa02deeab5d0e7ab4702972ffa72e)
This cherry-picks the commit from LadybirdBrowser/ladybird#272