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react.dev/docs/01-why-react.zh-CN.md
Daniel Lo Nigro d457201862 Upgrade to Jekyll 3 
Full list of changes is at https://jekyllrb.com/docs/upgrading/2-to-3/. The tl;dr of it is:
 - Relative permalinks were removed, so all the files in the `docs` subdirectory need their permalink to be prefixed with `docs/`
 - `post` and `page` types were renamed to `posts` and `pages` respectively
 - `jekyll-paginate`, `pygments` and `redcarpet` are all now optional, so I needed to explicitly add it to the Gemfile. Jekyll now uses `rouge` rather than `pygments` for syntax highlighting, but rouge does not support highlighting individual lines (`hl_lines`) so we need to continue using Pygments.
 - Layout metadata (eg. `sectionid`) is now on a `layout` variable rather than `page`

Tested the following pages and confirmed that they all work:
 - "Docs" link (getting started page): http://127.0.0.1:4000/react/docs/getting-started.html
 - Downloads: http://127.0.0.1:4000/react/downloads.html
 - Tutorial: http://127.0.0.1:4000/react/docs/tutorial.html
 - A few pages under the "docs" subdirectory, to confirm they're working properly:
    - http://127.0.0.1:4000/react/docs/addons.html
 - http://127.0.0.1:4000/react/docs/why-react.html
 - http://127.0.0.1:4000/react/docs/create-fragment.html
 - A few tips:
    - http://127.0.0.1:4000/react/tips/false-in-jsx.html
 - http://127.0.0.1:4000/react/tips/style-props-value-px.html
 - Non-English versions of the page:
    - http://127.0.0.1:4000/react/docs/getting-started-it-IT.html
    - http://127.0.0.1:4000/react/docs/getting-started-ja-JP.html
2016-07-19 12:18:49 -07:00

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why-react-zh-CN 为什么使用 React? docs/why-react-zh-CN.html displaying-data-zh-CN.html

React 是一个 Facebook 和 Instagram 用来创建用户界面的 JavaScript 库。很多人选择将 React 认为是 MVC 中的 V（视图）。

我们创造 React 是为了解决一个问题：构建随着时间数据不断变化的大规模应用程序。

简单

仅仅只要表达出你的应用程序在任一个时间点应该呈现的样子，然后当底层的数据变了，React 会自动处理所有用户界面的更新。

声明式 (Declarative)

数据变化后，React 概念上与点击“刷新”按钮类似，但仅会更新变化的部分。

构建可组合的组件

React 都是关于构建可复用的组件。事实上，通过 React 你唯一要做的事情就是构建组件。得益于其良好的封装性，组件使代码复用、测试和关注分离（separation of concerns）更加简单。

给它5分钟的时间

React挑战了很多传统的知识，第一眼看上去可能很多想法有点疯狂。当你阅读这篇指南，请给它5分钟的时间；那些疯狂的想法已经帮助 Facebook 和 Instagram 从里到外创建了上千的组件了。

了解更多

你可以从这篇博客了解更多我们创造 React 的动机。