When I first read these docs, it was not immediately clear to me that I could
use `React.addons.CSSTransitionGroup` to animate a single item coming into view,
or an item replacing an item already there. This was partly due to the example
which rendered a list of items.
This PR adds a blurb about being able to use
`React.addons.CSSTransitionGroup` with one or zero items, provides a code
example, and adds a note blockquote that a `key` attribute must always be
provided on each child of `React.addons.CSSTransitionGroup`. The latter point
was not immediately obvious from the original `TodoList` code example, since it
renders a list which would normally require `key` attributes anyway.
Test Plan:
- Refreshed `http://localhost:4000/react/docs/animation.html`, saw that the
docs additions rendered correctly.
- Example code not tested (it was extracted from working code).
Depends on #1758.
Fixes#1698.
Previously, controlled components would update too soon when using something like ReactLayeredComponentMixin (i.e., before the layer's updates could propagate from the parent), causing the cursor to jump even when always updating the new model value to match the DOM state. With this change, we defer the update until after all nested updates have had a chance to finish, which prevents the cursor from misbehaving.
Also cleaned up the logic around updating a bit -- the .value and .checked updates in ReactDOMInput weren't being relied on at all so I removed them and opted for a simple forceUpdate instead. I also got rid of _isChanging which hasn't been necessary since the introduction of update batching.
Test Plan: Tested the example in http://jsfiddle.net/Bobris/ZZtXn/2/ and verified that the cursor didn't jump. Changed the code to filter out numbers and verified that the field prevents typing numbers (attempting to do so still causes the cursor to jump to the end). Also verified that controlled and uncontrolled radio buttons, textareas, and select boxes work.
Callbacks passed to this setImmediate function are called at the end of the current update cycle, which is guaranteed to be asynchronous but in the same event loop (with the default batching strategy).
This is useful for new-style refs (#1373, #1554) and for fixing #1698.
Test Plan: jest
Paul O’Shannessy
Vjeux
Johannes Emerich
Andreas Svensson
Jed Watson
Ben Alpert
Shane O'Sullivan
David Hu
Sebastian Markbage
Cheng Lou
andres suarez