v16.1.1 is a patch release. Key changes include:

• Improve the warning about undefined component type. (@selbekk in #11505);
• Support string values for the capture attribute. (@maxschmeling in #11424).

v16.1.0 is a minor release. Key changes include:

• Fix an accidental extra global variable in the UMD builds. (@gaearon in #10935);
• Add support for portals in React.Children utilities. (@MatteoVH in #11378).

v16.0.0 is a major release. Key changes include:

• React 16 depends on the collection types Map and Set, as well as requestAnimationFrame. If you support older browsers and devices which may not yet provide the…;
• Components can now return arrays and strings from render. (Docs coming soon!).

v15.6.1 is a patch release. Key changes include:

• Fix a crash on iOS Safari. (@jquense in #9960);
• Don't add px to custom CSS property values. (@TrySound in #9966).

v15.6.0 is a minor release. Key changes include:

• Downgrade deprecation warnings to use console.warn instead of console.error. (@flarnie in #9753);
• Add a deprecation warning for React.createClass. Points users to create-react-class instead. (@flarnie in #9771).

v15.5.4 is a patch release. Key changes include:

• Critical Bugfix: Update the version of prop-types to fix critical bug. (@gaearon in 545c87f);
• Fix react-addons-create-fragment package to include loose-envify transform for Browserify users. (@mridgway in #9642).

v15.5.3 is a patch release. Key changes include:

• Fix react-addons-create-fragment package to export correct thing. (@gaearon in #9385);
• Fix create-react-class package to include loose-envify transform for Browserify users. (@mridgway in #9642).

v15.5.2 is a patch release. Key changes include:

• Fix the production single-file builds to not include the development code. (@gaearon in #9385);
• Apply better minification to production single-file builds. (@gaearon in #9385).

v15.5.1 is a patch release: fix erroneous proptypes access warning. (@acdlite in (ec97ebb)

v15.5.0 is a minor release. Key changes include:

• Added a deprecation warning for React.createClass. Points users to create-react-class instead. (@acdlite in d9a4fa4);
• Added a deprecation warning for React.PropTypes. Points users to prop-types instead. (@acdlite in 043845c).

v15.4.2 is a patch release. Key changes include:

• Fixed build issues with the Brunch bundler. (@gaearon in #8686);
• Improved error messages for invalid element types. (@spicyj in #8612).

v16.1.1 is a patch release. Key changes include:

• Improve the warning about undefined component type. (@selbekk in #11505);
• Support string values for the capture attribute. (@maxschmeling in #11424).

v16.1.0 is a minor release. Key changes include:

• Fix an accidental extra global variable in the UMD builds. (@gaearon in #10935);
• Add support for portals in React.Children utilities. (@MatteoVH in #11378).

v16.0.0 is a major release. Key changes include:

• React 16 depends on the collection types Map and Set, as well as requestAnimationFrame. If you support older browsers and devices which may not yet provide the…;
• Components can now return arrays and strings from render. (Docs coming soon!).

v15.6.1 is a patch release. Key changes include:

• Fix a crash on iOS Safari. (@jquense in #9960);
• Don't add px to custom CSS property values. (@TrySound in #9966).

v15.6.0 is a minor release. Key changes include:

• Downgrade deprecation warnings to use console.warn instead of console.error. (@flarnie in #9753);
• Add a deprecation warning for React.createClass. Points users to create-react-class instead. (@flarnie in #9771).

v15.5.4 is a patch release. Key changes include:

• Critical Bugfix: Update the version of prop-types to fix critical bug. (@gaearon in 545c87f);
• Fix react-addons-create-fragment package to include loose-envify transform for Browserify users. (@mridgway in #9642).

v15.5.3 is a patch release. Key changes include:

• Fix react-addons-create-fragment package to export correct thing. (@gaearon in #9385);
• Fix create-react-class package to include loose-envify transform for Browserify users. (@mridgway in #9642).

v15.5.2 is a patch release. Key changes include:

• Fix the production single-file builds to not include the development code. (@gaearon in #9385);
• Apply better minification to production single-file builds. (@gaearon in #9385).

v15.5.1 is a patch release: fix erroneous proptypes access warning. (@acdlite in (ec97ebb)

v15.5.0 is a minor release. Key changes include:

• Added a deprecation warning for React.createClass. Points users to create-react-class instead. (@acdlite in d9a4fa4);
• Added a deprecation warning for React.PropTypes. Points users to prop-types instead. (@acdlite in 043845c).

v15.4.2 is a patch release. Key changes include:

• Fixed build issues with the Brunch bundler. (@gaearon in #8686);
• Improved error messages for invalid element types. (@spicyj in #8612).