No new features, but a lot of changes, paving the way for future releases.
The React 17 release is unusual because it doesn’t add any new developer-facing features. Instead, this release is primarily focused on making it easier to upgrade React itself.
We’re actively working on the new React features, but they’re not a part of this release. The React 17 release is a key part of our strategy to roll them out without leaving anyone behind.
In particular, React 17 is a “stepping stone” release that makes it safer to embed a tree managed by one version of React inside a tree managed by a different version of React.
Here are the major changes:
- Changes to Event Delegation
- No Event Pooling
- Effect Cleanup Timing Change
- Consistent Errors for Returning
- Methods of removing private exports
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