[DevTools] Allow Introspection of React Elements and React.lazy #34129
Conversation
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Also fixes a bug with dehydrating thenable Unfortunately we have to name it _payload instead of aliasing because of how dehydration works.
Unfortunately because of a naming conflict type key is used.
github-actions
bot
added
the
React Core Team
eps1lon
approved these changes
Aug 11, 2025
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
2 participants
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Outdated suggestions cannot be applied.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.
With RSC it's common to get React.lazy objects in the children position. This first formats them nicely.
Then it adds introspection support for both lazy and elements.
Unfortunately because of quirks with the hydration mechanism we have to expose it under the name
_payloadinstead of something direct. Also because the name "type" is taken we can't expose the type field on an element neither. That whole algorithm could use a rewrite.For JSX an alternative or additional feature might be instead to jump to the first Instance that was rendered using that JSX. We know that based on the equality of the memoizedProps on the Fiber. It's just a matter of whether we do that eagerly or more lazily when you click but you may not have a match so would be nice to indicate that before you click.