Files
react/packages/react-debug-tools
Andrew Clark fe7163e73d Add unstable prefix to experimental APIs (#18825)
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.
2020-05-04 22:25:41 -07:00
..

react-debug-tools

This is an experimental package for debugging React renderers.

Its API is not as stable as that of React, React Native, or React DOM, and does not follow the common versioning scheme.

Use it at your own risk.