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react 0.12.0

npm / react / 0.12.0 source ↗

React Core

Breaking Changes

  • key and ref moved off props object, now accessible on the element directly
  • React is now BSD licensed with accompanying Patents grant
  • Default prop resolution has moved to Element creation time instead of mount time, making them effectively static
  • React.__internals is removed - it was exposed for DevTools which no longer needs access
  • Composite Component functions can no longer be called directly - they must be wrapped with React.createFactory first. This is handled for you when using JSX.

New Features

  • Spread operator ({...}) introduced to deprecate this.transferPropsTo
  • Added support for more HTML attributes: acceptCharset, classID, manifest

Deprecations

  • React.renderComponent --> React.render
  • React.renderComponentToString --> React.renderToString
  • React.renderComponentToStaticMarkup --> React.renderToStaticMarkup
  • React.isValidComponent --> React.isValidElement
  • React.PropTypes.component --> React.PropTypes.element
  • React.PropTypes.renderable --> React.PropTypes.node
  • DEPRECATED React.isValidClass
  • DEPRECATED instance.transferPropsTo
  • DEPRECATED Returning false from event handlers to preventDefault
  • DEPRECATED Convenience Constructor usage as function, instead wrap with React.createFactory
  • DEPRECATED use of key={null} to assign implicit keys

Bug Fixes

  • Better handling of events and updates in nested results, fixing value restoration in "layered" controlled components
  • Correctly treat event.getModifierState as case sensitive
  • Improved normalization of event.charCode
  • Better error stacks when involving autobound methods
  • Removed DevTools message when the DevTools are installed
  • Correctly detect required language features across browsers
  • Fixed support for some HTML attributes:
    • list updates correctly now
    • scrollLeft, scrollTop removed, these should not be specified as props
  • Improved error messages

React With Addons

New Features

  • React.addons.batchedUpdates added to API for hooking into update cycle

Breaking Changes

  • React.addons.update uses assign instead of copyProperties which does hasOwnProperty checks. Properties on prototypes will no longer be updated correctly.

Bug Fixes

  • Fixed some issues with CSS Transitions

JSX

Breaking Changes

  • Enforced convention: lower case tag names are always treated as HTML tags, upper case tag names are always treated as composite components
  • JSX no longer transforms to simple function calls

New Features

  • @jsx React.DOM no longer required
  • spread ({...}) operator introduced to allow easier use of props

Bug Fixes

  • JSXTransformer: Make sourcemaps an option when using APIs directly (eg, for react-rails)