Add notes for July, 28

2016-07/july-28.md

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+## July 28 ([discuss](https://github.com/reactjs/core-notes/pull/25))
+
+### Attendees
+
+* [Ben](https://twitter.com/soprano) (React)
+* [Christopher](https://twitter.com/vjeux) (React)
+* [Dan](https://twitter.com/dan_abramov) (React)
+* [Keyan](https://twitter.com/keyanzhang) (React, intern)
+* [Kevin](https://twitter.com/lacker) (Developer Advocacy)
+* [Paul](https://twitter.com/zpao) (React)
+* [Sebastian](https://twitter.com/sebmarkbage) (React)
+* [Tom](https://twitter.com/tomocchino) (React)
+
+### Individual Updates
+
+#### Ben
+
+* Ran the [`createClass` codemod](https://github.com/reactjs/react-codemod#class) on the Facebook.com codebase.
+* ES6 class usage is up from 30% to 80% in it!
+* More good news: [Public Class Fields](https://github.com/tc39/proposal-class-public-fields) (aka “Class Properties”) ES proposal has [advanced to Stage 2](https://github.com/tc39/proposals).
+
+#### Paul
+
+* Continued work on the [React release manager](https://github.com/reactjs/core-notes/blob/master/2016-07/july-21.md#react-release-manager).
+* Busy reviewing two pull requests: one from [Keyan](https://twitter.com/keyanzhang) and one from [Sebastian](https://twitter.com/sebmarkbage).
+* [Keyan](https://twitter.com/keyanzhang)’s pull request [changes React build process to use Rollup](https://github.com/facebook/react/pull/7178).
+* [Sebastian](https://twitter.com/sebmarkbage)’s pull request [significantly changes how React packages are bundled internally](https://github.com/facebook/react/pull/7168).
+* Unfortunately those changes conflict, and we are going with [Sebastian](https://twitter.com/sebmarkbage)’s pull request first.
+* See the section below explaining these changes in more detail.
+
+#### Dan
+
+* Released [Create React App](https://github.com/facebookincubator/create-react-app).
+* Lots of positive feedback.
+* Working on 0.2.0 that fixes issues with cloud editors and busy ports.
+* Missing features for calling it 1.0: testing, [proxying API requests](https://github.com/facebookincubator/create-react-app/blob/master/template/README.md#proxying-api-requests-in-development).
+* We merged [Jest support](https://github.com/facebookincubator/create-react-app/pull/250) but people are concerned because it lost a ton of community trust in the first year.
+* We want to use Jest because we’re excited about [Snapshot Testing](https://facebook.github.io/jest/blog/2016/07/27/jest-14.html) and are committed to improving Jest.
+* [Dan](https://twitter.com/dan_abramov) will make sure the testing experience is good before releasing it officially.
+
+#### Kevin
+
+* React never had people working on developer advocacy and community outreach.
+* We feel it is time to improve this, and [Kevin](https://twitter.com/lacker) will help us.
+* He already worked on [revamping React Native docs](https://facebook.github.io/react-native/docs/getting-started.html) which was highly successful.
+* Things that need addressing: React docs, GitHub issue management.
+
+### Changes to Bundling
+
+* Sebastian prepared a series of PRs that *really* split `react` and `react-dom` packages. ([#7164](https://github.com/facebook/react/pull/7164), [#7168](https://github.com/facebook/react/pull/7168), [#7173](https://github.com/facebook/react/pull/7173))
+* `react-dom` package implementation used to live inside of `react` package for legacy reasons.
+* Now they are separated: `react` only contains “renderer-agnostic” things like `React.Component`, `React.createElement`, and `React.Children`.
+* This is still work in progress, and there are many weird hacks we have to do, but we’ll reduce them over time.
+
+#### Plan for Reconcilers and Renderers
+
+* Paradoxically, `react` package won’t include include the React algorithm (“reconciler”) anymore.
+* For example, `React.createElement()` and `React.Component` stay there, but not the reconciler itself.
+* This makes sense because components relying on `react` don’t actually care how reconciler is implemented.
+* The React reconciler will exist in renderer packages such as `react-dom` and `react-native`.
+* Since almost nobody uses two renderers at the same time, each renderer will use a *copy* of the reconciler code.
+* This makes it possible for `react-native` and `react-dom` to move at different speeds and temporarily “fork” the reconciler code if needed.
+* This also makes it possible for `react-dom` to offer the new experimental [“Fiber” reconciler](https://github.com/reactjs/core-notes/blob/master/2016-06/june-23.md#update-on-fiber) behind a flag without changing all the third-party components that depend on `react`.
+* This sounds confusing but we think it’ll work better in practice.
+
+------------
+
+Please feel free to discuss these notes in the [corresponding pull request](https://github.com/reactjs/core-notes/pull/25).