v16.12.0 is a minor release. Key changes include:

• Fix passive effects (useEffect) not being fired in a multi-root app. (@acdlite in #17347);
• Fix lazy and memo types considered elements instead of components (@bvaughn in #17278).

v16.11.0 is a minor release. Key changes include:

• Fix mouseenter handlers from firing twice inside nested React containers. @yuanoook in #16928;
• Remove unstable_createRoot and unstable_createSyncRoot experimental APIs. (These are available in the Experimental channel as createRoot and createSyncRoot.) (….

v16.10.2 is a patch release. Key changes include:

• Fix regression in react-native-web by restoring order of arguments in event plugin extractors (@necolas in #16978);
• react: https://unpkg.com/react@16.10.2/umd/.

v16.10.1 is a patch release: fix regression in next.js apps by allowing suspense mismatch during hydration to silently proceed (@sebmarkbage in #16943)

v16.10.0 is a minor release. Key changes include:

• Fix edge case where a hook update wasn't being memoized. (@sebmarkbage in #16359);
• Fix heuristic for determining when to hydrate, so we don't incorrectly hydrate during an update. (@sebmarkbage in #16739).

v16.9.0 is a minor release. Key changes include:

• Add <React.Profiler> API for gathering performance measurements programmatically. (@bvaughn in #15172);
• Remove unstable_ConcurrentMode in favor of unstable_createRoot. (@acdlite in #15532).

v16.9.0-rc.0 is a pre-release release. Key changes include:

• react: https://unpkg.com/react@16.9.0-rc.0/umd/;
• react-art: https://unpkg.com/react-art@16.9.0-rc.0/umd/.

v16.9.0-alpha.0 is a pre-release release. Key changes include:

• (await act(async () => ...) (@threepointone in #14853);
• react: https://unpkg.com/react@16.9.0-alpha.0/umd/.

v16.8.6 is a patch release. Key changes include:

• Fix an incorrect bailout in useReducer(). (@acdlite in #15124);
• Fix iframe warnings in Safari DevTools. (@renanvalentin in #15099).

v16.8.5 is a patch release. Key changes include:

• Don't set the first option as selected in select tag with size attribute. (@kulek1 in #14242);
• Improve the useEffect(async () => ...) warning message. (@gaearon in #15118).

v16.8.4 is a patch release: fix a bug where devtools caused a runtime error when inspecting a component that used a usecontext hook. (@bvaughn in #14940)

v16.8.3 is a patch release. Key changes include:

• Fix a bug that caused inputs to behave incorrectly in UMD builds. (@gaearon in #14914);
• Fix a bug that caused render phase updates to be discarded. (@gaearon in #14852).

v16.8.2 is a patch release. Key changes include:

• Fix ReactDOM.render being ignored inside useEffect. (@gaearon in #14799);
• Fix a crash when unmounting empty portals. (@gaearon in #14820).

v16.8.1 is a patch release. Key changes include:

• Fix a crash when used together with an older version of React. (@bvaughn in #14770);
• Fix a crash in Node environment. (@threepointone in #14768).

v16.8.0 is a minor release. Key changes include:

• Add Hooks — a way to use state and other React features without writing a class. (@acdlite et al. in #13968);
• Improve the useReducer Hook lazy initialization API. (@acdlite in #14723).

v16.12.0 is a minor release. Key changes include:

• Fix passive effects (useEffect) not being fired in a multi-root app. (@acdlite in #17347);
• Fix lazy and memo types considered elements instead of components (@bvaughn in #17278).

v16.11.0 is a minor release. Key changes include:

• Fix mouseenter handlers from firing twice inside nested React containers. @yuanoook in #16928;
• Remove unstable_createRoot and unstable_createSyncRoot experimental APIs. (These are available in the Experimental channel as createRoot and createSyncRoot.) (….

v16.10.2 is a patch release. Key changes include:

• Fix regression in react-native-web by restoring order of arguments in event plugin extractors (@necolas in #16978);
• react: https://unpkg.com/react@16.10.2/umd/.

v16.10.1 is a patch release: fix regression in next.js apps by allowing suspense mismatch during hydration to silently proceed (@sebmarkbage in #16943)

v16.10.0 is a minor release. Key changes include:

• Fix edge case where a hook update wasn't being memoized. (@sebmarkbage in #16359);
• Fix heuristic for determining when to hydrate, so we don't incorrectly hydrate during an update. (@sebmarkbage in #16739).

v16.9.0 is a minor release. Key changes include:

• Add <React.Profiler> API for gathering performance measurements programmatically. (@bvaughn in #15172);
• Remove unstable_ConcurrentMode in favor of unstable_createRoot. (@acdlite in #15532).

v16.9.0-rc.0 is a pre-release release. Key changes include:

• react: https://unpkg.com/react@16.9.0-rc.0/umd/;
• react-art: https://unpkg.com/react-art@16.9.0-rc.0/umd/.

v16.9.0-alpha.0 is a pre-release release. Key changes include:

• (await act(async () => ...) (@threepointone in #14853);
• react: https://unpkg.com/react@16.9.0-alpha.0/umd/.

v16.8.6 is a patch release. Key changes include:

• Fix an incorrect bailout in useReducer(). (@acdlite in #15124);
• Fix iframe warnings in Safari DevTools. (@renanvalentin in #15099).

v16.8.5 is a patch release. Key changes include:

• Don't set the first option as selected in select tag with size attribute. (@kulek1 in #14242);
• Improve the useEffect(async () => ...) warning message. (@gaearon in #15118).

v16.8.4 is a patch release: fix a bug where devtools caused a runtime error when inspecting a component that used a usecontext hook. (@bvaughn in #14940)

v16.8.3 is a patch release. Key changes include:

• Fix a bug that caused inputs to behave incorrectly in UMD builds. (@gaearon in #14914);
• Fix a bug that caused render phase updates to be discarded. (@gaearon in #14852).

v16.8.2 is a patch release. Key changes include:

• Fix ReactDOM.render being ignored inside useEffect. (@gaearon in #14799);
• Fix a crash when unmounting empty portals. (@gaearon in #14820).

v16.8.1 is a patch release. Key changes include:

• Fix a crash when used together with an older version of React. (@bvaughn in #14770);
• Fix a crash in Node environment. (@threepointone in #14768).

v16.8.0 is a minor release. Key changes include:

• Add Hooks — a way to use state and other React features without writing a class. (@acdlite et al. in #13968);
• Improve the useReducer Hook lazy initialization API. (@acdlite in #14723).