-
Notifications
You must be signed in to change notification settings - Fork 47.1k
New issue
Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.
By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.
Already on GitHub? Sign in to your account
Add unstable prefix to experimental APIs #18825
Merged
Merged
Conversation
This file contains 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
We've been shipping unprefixed experimental APIs (like `createRoot` and `useTransition`) to the Experimental release channel, with the rationale that because these APIs do not appear in any stable release, we're free to change or remove them later without breaking any downstream projects. What we didn't consider is that downstream projects might be tempted to use feature detection: ```js const useTransition = React.useTransition || fallbackUseTransition; ``` This pattern assumes that the version of `useTransition` that exists in the Experimental channel today has the same API contract as the final `useTransition` API that we'll eventually ship to stable. To discourage feature detection, I've added an `unstable_` prefix to all of our unstable APIs. The Facebook builds still have the unprefixed APIs, though. We will continue to support those; if we make any breaking changes, we'll migrate the internal callers like we usually do. To make testing easier, I added the `unstable_`-prefixed APIs to the www builds, too. That way our tests can always use the prefixed ones without gating on the release channel.
facebook-github-bot
added
CLA Signed
React Core Team
Opened by a member of the React Core Team
labels
May 5, 2020
sebmarkbage
approved these changes
May 5, 2020
This pull request is automatically built and testable in CodeSandbox. To see build info of the built libraries, click here or the icon next to each commit SHA. Latest deployment of this branch, based on commit 9fe4075:
|
This was referenced May 8, 2020
Merged
created a documentation update issue: Please close the issue if the team think it's best to avoid this change 😄 |
smmoosavi
added a commit
to kgolezardi/Performance-Review-Web
that referenced
this pull request
May 17, 2020
related issues: - DefinitelyTyped/DefinitelyTyped#44564 - facebook/react#18825
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
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.
We've been shipping unprefixed experimental APIs (like
createRoot
anduseTransition
) to the Experimental release channel, with the rationale that because these APIs do not appear in any stable release, we're free to change or remove them later without breaking any downstream projects.What we didn't consider is that downstream projects might be tempted to use feature detection:
This pattern assumes that the version of
useTransition
that exists in the Experimental channel today has the same API contract as the finaluseTransition
API that we'll eventually ship to stable.To discourage feature detection, I've added an
unstable_
prefix to all of our unstable APIs.The Facebook builds still have the unprefixed APIs, though. We will continue to support those; if we make any breaking changes, we'll migrate the internal callers like we usually do. To make testing easier, I added the
unstable_
-prefixed APIs to the www builds, too. That way our tests can always use the prefixed ones without gating on the release channel.