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Update links to use https:// where it is supported. There's probably a lot more that could be fixed, but these are the core ones I found (especially the download links in order to prevent MITM attacks). Note that there are some fb.me links that will redirect to http:// even while accessed over https://, but this seemed like the best way to fix those for now. NOTE: Only non-third-party files were modified. There are references to http:// URLs in vendored/third-party files, but seems appropriate to fix upstream for those rather than editing the files. Also, copy one image locally to the blog, as it was hotlinking to a site that did not support https://. Last, use youtube-nocookie.com instead of youtube.com for video embeds, as the former doesn't try to set a cookie on load (privacy enhancement).
33 lines
1.5 KiB
Markdown
33 lines
1.5 KiB
Markdown
---
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id: why-react-zh-CN
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title: 为什么使用 React?
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permalink: why-react-zh-CN.html
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next: displaying-data-zh-CN.html
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---
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React 是一个 Facebook 和 Instagram 用来创建用户界面的 JavaScript 库。很人多认为 React 是 **[MVC](https://en.wikipedia.org/wiki/Model%E2%80%93view%E2%80%93controller)** 中的 **V**（视图）。
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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**。为了达到这个目标，React 采用下面两个主要的思想。
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### 简单
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仅仅只要表达出你的应用程序在任一个时间点应该长的样子，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。
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### 声明式 (Declarative)
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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。
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## 构建可组合的组件
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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。
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## 给它5分钟的时间
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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](https://signalvnoise.com/posts/3124-give-it-five-minutes)；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。
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## 了解更多
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你可以从这篇[博客](/react/blog/2013/06/05/why-react.html)了解更多我们创造 React 的动机。
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