Merge pull request #173 from reactjs/sync-647b6392

Sync with reactjs.org @ 647b639

Author: taehwanno

content/community/meetups.md

@@ -25,6 +25,7 @@ Do you have a local React.js meetup? Add it here! (Please keep the list alphabet
 * [Joinville](https://www.meetup.com/pt-BR/React-Joinville/)
 * [Rio de Janeiro](https://www.meetup.com/pt-BR/React-Rio-de-Janeiro/)
 * [São Paulo](https://www.meetup.com/pt-BR/ReactJS-SP/)
+* [Vila Velha](https://www.meetup.com/pt-BR/React-ES/)
 
 ## Bolivia {#bolivia}
 * [Bolivia](https://www.meetup.com/ReactBolivia/)
@@ -58,7 +59,7 @@ Do you have a local React.js meetup? Add it here! (Please keep the list alphabet
 * [Karlsruhe](https://www.meetup.com/react_ka/)
 * [Kiel](https://www.meetup.com/Kiel-React-Native-Meetup/)
 * [Munich](https://www.meetup.com/ReactJS-Meetup-Munich/)
-* [React Berlin](https://www.meetup.com/React-Berlin/)
+* [React Berlin](https://www.meetup.com/React-Open-Source/)
 * [React.JS Girls Berlin](https://www.meetup.com/ReactJS-Girls-Berlin/)
 
 ## Greece {#greece}

content/community/support.md

@@ -26,7 +26,7 @@ Each community consists of many thousands of React users.
 
 * [DEV's React community](https://dev.to/t/react)
 * [Hashnode's React community](https://hashnode.com/n/reactjs)
-* [Reactiflux online chat](https://discord.gg/0ZcbPKXt5bZjGY5n)
+* [Reactiflux online chat](https://discord.gg/reactiflux)
 * [Reddit's React community](https://www.reddit.com/r/reactjs/)
 * [Spectrum's React community](https://spectrum.chat/react)
 

content/community/tools-ui-components.md

@@ -79,3 +79,4 @@ permalink: community/ui-components.html
 * **[jQWidgets React components](https://www.jqwidgets.com/react/)**: Enterprise Ready 70+ UI Components.
 * **[KendoReact](https://www.telerik.com/kendo-react-ui/)**: UI for React Developers.
 * **[Mobiscroll React UI Components](https://mobiscroll.com/react)** Mobile UI Controls for the Productive React Developer.
+* **[React UI Toolkit](https://react-ui-tools.com/)**: 115+ professionally maintainted UI components ranging from a robust grid to charts and more. Try for FREE and build React apps faster.

content/docs/context.md

@@ -15,6 +15,7 @@ context를 이용하면 단계마다 일일이 props를 넘겨주지 않고도 
   - [Context.Provider](#contextprovider)
   - [Class.contextType](#classcontexttype)
   - [Context.Consumer](#contextconsumer)
+  - [Context.displayName](#contextdisplayname)
 - [예시](#examples)
   - [값이 변하는 context](#dynamic-context)
   - [하위 컴포넌트에서 context 업데이트하기](#updating-context-from-a-nested-component)
@@ -194,6 +195,20 @@ Context.Consumer의 자식은 [함수](/docs/render-props.html#using-props-other
 >
 >함수를 자식으로 받는 패턴에 대해서는 [render props](/docs/render-props.html)을 참조하세요.
 
+### `Context.displayName` {#contextdisplayname}
+
+Context 객체는 `displayName` 문자열 속성을 설정할 수 있습니다. React 개발자 도구는 이 문자열을 사용해서 context를 어떻게 보여줄 지 결정합니다.
+
+예를 들어, 아래 컴포넌트는 개발자 도구에 MyDisplayName로 표시됩니다.
+
+```js{2}
+const MyContext = React.createContext(/* some value */);
+MyContext.displayName = 'MyDisplayName';
+
+<MyContext.Provider> // "MyDisplayName.Provider" in DevTools
+<MyContext.Consumer> // "MyDisplayName.Consumer" in DevTools
+```
+
 ## 예시 {#examples}
 
 ### 값이 변하는 context {#dynamic-context}

content/docs/faq-versioning.md

@@ -10,12 +10,14 @@ React follows [semantic versioning (semver)](https://semver.org/) principles.
 
 That means that with a version number **x.y.z**:
 
+* When releasing **critical bug fixes**, we make a **patch release** by changing the **z** number (ex: 15.6.2 to 15.6.3).
+* When releasing **new features** or **non-critical fixes**, we make a **minor release** by changing the **y** number (ex: 15.6.2 to 15.7.0).
 * When releasing **breaking changes**, we make a **major release** by changing the **x** number (ex: 15.6.2 to 16.0.0).
-* When releasing **new features**, we make a **minor release** by changing the **y** number (ex: 15.6.2 to 15.7.0).
-* When releasing **bug fixes**, we make a **patch release** by changing the **z** number (ex: 15.6.2 to 15.6.3).
 
 Major releases can also contain new features, and any release can include bug fixes.
 
+Minor releases are the most common type of release.
+
 ### Breaking Changes {#breaking-changes}
 
 Breaking changes are inconvenient for everyone, so we try to minimize the number of major releases – for example, React 15 was released in April 2016 and React 16 was released in September 2017; React 17 isn't expected until 2019.
@@ -46,3 +48,17 @@ In general, we *don't* bump the major version number for changes to:
 This policy is designed to be pragmatic: certainly, we don't want to cause headaches for you. If we bumped the major version for all of these changes, we would end up releasing more major versions and ultimately causing more versioning pain for the community. It would also mean that we can't make progress in improving React as fast as we'd like.
 
 That said, if we expect that a change on this list will cause broad problems in the community, we will still do our best to provide a gradual migration path.
+
+### If a Minor Release Includes No New Features, Why Isn't It a Patch? {#minors-versus-patches}
+
+It's possible that a minor release will not include new features. [This is allowed by semver](https://semver.org/#spec-item-7), which states **"[a minor version] MAY be incremented if substantial new functionality or improvements are introduced within the private code. It MAY include patch level changes."**
+
+However, it does raise the question of why these releases aren't versioned as patches instead.
+
+The answer is that any change to React (or other software) carries some risk of breaking in unexpected ways. Imagine a scenario where a patch release that fixes one bug accidentally introduces a different bug. This would not only be disruptive to developers, but also harm their confidence in future patch releases. It's especially regrettable if the original fix is for a bug that is rarely encountered in practice.
+
+We have a pretty good track record for keeping React releases free of bugs, but patch releases have an even higher bar for reliability because most developers assume they can be adopted without adverse consequences.
+
+For these reasons, we reserve patch releases only for the most critical bugs and security vulnerabilities.
+
+If a release includes non-essential changes — such as internal refactors, changes to implementation details, performance improvements, or minor bugfixes — we will bump the minor version even when there are no new features.

content/docs/hooks-faq.md

@@ -109,7 +109,9 @@ You can continue to use the exact same APIs as you always have; they'll continue
 
 React Redux since v7.1.0 [supports Hooks API](https://react-redux.js.org/api/hooks) and exposes hooks like `useDispatch` or `useSelector`.
 
-Libraries like React Router might support hooks in the future.
+React Router [supports hooks](https://reacttraining.com/react-router/web/api/Hooks) since v5.1.
+
+Other libraries might support hooks in the future too.
 
 ### Do Hooks work with static typing? {#do-hooks-work-with-static-typing}
 

content/docs/how-to-contribute.md

@@ -19,19 +19,25 @@ Facebook has adopted the [Contributor Covenant](https://www.contributor-covenant
 
 All work on React happens directly on [GitHub](https://github.com/facebook/react). Both core team members and external contributors send pull requests which go through the same review process.
 
+### Semantic Versioning {#semantic-versioning}
+
+React follows [semantic versioning](https://semver.org/). We release patch versions for critical bugfixes, minor versions for new features or non-essential changes, and major versions for any breaking changes. When we make breaking changes, we also introduce deprecation warnings in a minor version so that our users learn about the upcoming changes and migrate their code in advance. Learn more about our commitment to stability and incremental migration in [our versioning policy](https://reactjs.org/docs/faq-versioning.html).
+
+Every significant change is documented in the [changelog file](https://github.com/facebook/react/blob/master/CHANGELOG.md).
+
 ### Branch Organization {#branch-organization}
 
-We will do our best to keep the [`master` branch](https://github.com/facebook/react/tree/master) in good shape, with tests passing at all times. But in order to move fast, we will make API changes that your application might not be compatible with. We recommend that you use [the latest stable version of React](/versions.html).
+Submit all changes directly to the [`master branch`](https://github.com/facebook/react/tree/master). We don't use separate branches for development or for upcoming releases. We do our best to keep `master` in good shape, with all tests passing.
 
-If you send a pull request, please do it against the `master` branch. We maintain stable branches for major versions separately but we don't accept pull requests to them directly. Instead, we cherry-pick non-breaking changes from master to the latest stable major version.
+Code that lands in `master` must be compatible with the latest stable release. It may contain additional features, but no breaking changes. We should be able to release a new minor version from the tip of `master` at any time.
 
-### Semantic Versioning {#semantic-versioning}
+### Feature Flags {#feature-flags}
 
-React follows [semantic versioning](https://semver.org/). We release patch versions for bugfixes, minor versions for new features, and major versions for any breaking changes. When we make breaking changes, we also introduce deprecation warnings in a minor version so that our users learn about the upcoming changes and migrate their code in advance.
+To keep the `master` branch in a releasable state, breaking changes and experimental features must be gated behind a feature flag.
 
-We tag every pull request with a label marking whether the change should go in the next [patch](https://github.com/facebook/react/pulls?q=is:open+is:pr+label:semver-patch), [minor](https://github.com/facebook/react/pulls?q=is:open+is:pr+label:semver-minor), or a [major](https://github.com/facebook/react/pulls?q=is:open+is:pr+label:semver-major) version. We release new patch versions every few weeks, minor versions every few months, and major versions one or two times a year.
+Feature flags are defined in [`packages/shared/ReactFeatureFlags.js`](https://github.com/facebook/react/blob/master/packages/shared/ReactFeatureFlags.js). Some builds of React may enable different sets of feature flags; for example, the React Native build may be configured differently than React DOM. These flags are found in [`packages/shared/forks`](https://github.com/facebook/react/tree/master/packages/shared/forks). Feature flags are statically typed by Flow, so you can run `yarn flow` to confirm that you've updated all the necessary files.
 
-Every significant change is documented in the [changelog file](https://github.com/facebook/react/blob/master/CHANGELOG.md).
+React's build system will strip out disabled feature branches before publishing. A continuous integration job runs on every commit to check for changes in bundle size. You can use the change in size as a signal that a feature was gated correctly.
 
 ### Bugs {#bugs}
 

content/footerNav.yml

@@ -30,7 +30,7 @@ channels:
       to: https://reactjs.org/community/support.html#popular-discussion-forums
       external: true
     - title: Reactiflux Chat
-      to: https://discord.gg/0ZcbPKXt5bZjGY5n
+      to: https://discord.gg/reactiflux
       external: true
     - title: DEV Community
       to: https://dev.to/t/react

content/languages.yml

@@ -22,7 +22,7 @@
 - name: Bengali
   translated_name: বাংলা
   code: bn
-  status: 0
+  status: 1
 - name: Catalan
   translated_name: Català
   code: ca

content/tutorial/tutorial.md

@@ -120,7 +120,7 @@ import './index.css';
 
 ### 도움이 필요할 때! {#help-im-stuck}
 
-막히는 부분이 생겼다면 [커뮤니티에서 지원하는 자료](/community/support.html)를 확인해보세요. 특히 [Reactiflux Chat](https://discord.gg/0ZcbPKXt5bZjGY5n)은 빠르게 도움을 받을 수 있는 좋은 방법입니다. 원하는 답을 얻지 못하거나 계속 막힌 상태라면 이슈를 제출해주세요. 우리가 도와드리겠습니다.
+막히는 부분이 생겼다면 [커뮤니티에서 지원하는 자료](/community/support.html)를 확인해보세요. 특히 [Reactiflux Chat](https://discord.gg/reactiflux)은 빠르게 도움을 받을 수 있는 좋은 방법입니다. 원하는 답을 얻지 못하거나 계속 막힌 상태라면 이슈를 제출해주세요. 우리가 도와드리겠습니다.
 
 ## 개요 {#overview}
 

content/versions.yml

@@ -1,3 +1,5 @@
+- title: '16.10'
+  changelog: https://github.com/facebook/react/blob/master/CHANGELOG.md#16100-september-27-2019
 - title: '16.9'
   changelog: https://github.com/facebook/react/blob/master/CHANGELOG.md#1690-august-8-2019
 - title: '16.8'

package.json

@@ -47,8 +47,8 @@
     "normalize.css": "^8.0.0",
     "prettier": "^1.7.4",
     "prismjs": "^1.15.0",
-    "react": "^16.9.0",
-    "react-dom": "^16.9.0",
+    "react": "^16.10.0",
+    "react-dom": "^16.10.0",
     "react-helmet": "^5.2.0",
     "react-live": "1.8.0-0",
     "remarkable": "^1.7.1",

src/site-constants.js

@@ -8,7 +8,7 @@
 // NOTE: We can't just use `location.toString()` because when we are rendering
 // the SSR part in node.js we won't have a proper location.
 const urlRoot = 'https://ko.reactjs.org';
-const version = '16.9.0';
+const version = '16.10.0';
 const babelURL = 'https://unpkg.com/babel-standalone@6.26.0/babel.min.js';
 
 export {babelURL, urlRoot, version};

yarn.lock

@@ -10903,15 +10903,15 @@ react-dev-utils@^4.2.1:
     strip-ansi "3.0.1"
     text-table "0.2.0"
 
-react-dom@^16.9.0:
-  version "16.9.0"
-  resolved "https://registry.yarnpkg.com/react-dom/-/react-dom-16.9.0.tgz#5e65527a5e26f22ae3701131bcccaee9fb0d3962"
-  integrity sha512-YFT2rxO9hM70ewk9jq0y6sQk8cL02xm4+IzYBz75CQGlClQQ1Bxq0nhHF6OtSbit+AIahujJgb/CPRibFkMNJQ==
+react-dom@^16.10.0:
+  version "16.10.0"
+  resolved "https://registry.yarnpkg.com/react-dom/-/react-dom-16.10.0.tgz#319356767b5c044f3c016eef28518ef7726dce84"
+  integrity sha512-0QJQUFrKG04hB/1lWyUs/FOd1qNseKGRQI+JBRsADIqVAFxYObhZ2zsVQKjt+nVSCmi8KA0sL52RLwwWuXQtOw==
   dependencies:
     loose-envify "^1.1.0"
     object-assign "^4.1.1"
     prop-types "^15.6.2"
-    scheduler "^0.15.0"
+    scheduler "^0.16.0"
 
 react-error-overlay@^3.0.0:
   version "3.0.0"
@@ -10965,10 +10965,10 @@ react-side-effect@^1.1.0:
     exenv "^1.2.1"
     shallowequal "^1.0.1"
 
-react@^16.9.0:
-  version "16.9.0"
-  resolved "https://registry.yarnpkg.com/react/-/react-16.9.0.tgz#40ba2f9af13bc1a38d75dbf2f4359a5185c4f7aa"
-  integrity sha512-+7LQnFBwkiw+BobzOF6N//BdoNw0ouwmSJTEm9cglOOmsg/TMiFHZLe2sEoN5M7LgJTj9oHH0gxklfnQe66S1w==
+react@^16.10.0:
+  version "16.10.0"
+  resolved "https://registry.yarnpkg.com/react/-/react-16.10.0.tgz#95c41e8fc1c706e174deef54b663b5ab94c8ee32"
+  integrity sha512-lc37bD3j6ZWJRso/a1rrFu6CO1qOf30ZadUDBi1c5RHA1lBSWA8x2MGABB6Oikk+RfmgC+kAT+XegL0eD1ecKg==
   dependencies:
     loose-envify "^1.1.0"
     object-assign "^4.1.1"
@@ -11718,10 +11718,10 @@ sax@>=0.6.0, sax@^1.2.4, sax@~1.2.1, sax@~1.2.4:
   resolved "https://registry.yarnpkg.com/sax/-/sax-1.2.4.tgz#2816234e2378bddc4e5354fab5caa895df7100d9"
   integrity sha512-NqVDv9TpANUjFm0N8uM5GxL36UgKi9/atZw+x7YFnQ8ckwFGKrl4xX4yWtrey3UJm5nP1kUbnYgLopqWNSRhWw==
 
-scheduler@^0.15.0:
-  version "0.15.0"
-  resolved "https://registry.yarnpkg.com/scheduler/-/scheduler-0.15.0.tgz#6bfcf80ff850b280fed4aeecc6513bc0b4f17f8e"
-  integrity sha512-xAefmSfN6jqAa7Kuq7LIJY0bwAPG3xlCj0HMEBQk1lxYiDKZscY2xJ5U/61ZTrYbmNQbXa+gc7czPkVo11tnCg==
+scheduler@^0.16.0:
+  version "0.16.0"
+  resolved "https://registry.yarnpkg.com/scheduler/-/scheduler-0.16.0.tgz#cc8914b79c5c1cfa16714cb1ddc4cbd2c7513efa"
+  integrity sha512-Jq59uCXQzi71B562VEjuDgvsgfTfkLDvdjNhA7hamN/fKBxecXIEFF24Zu4OVrnAz9NJJ8twa9X16Zp4b0P/xQ==
   dependencies:
     loose-envify "^1.1.0"
     object-assign "^4.1.1"