December 2017
Intermediate to advanced
329 pages
6h 9m
Chinese
Content preview from React学习手册
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62
第
4
章
React
进阶
为了了解
React
在浏览器中的运行机制，本章将会单独介绍
React
。下一章将会介绍
JSX
，即
JavaScript
下的
XML
格式。也许读者已经和
React
打过交道，但是从未看过将
JSX
格式的代码转译成
React
源码。用户完全可以在不了解
React
源码的情况下放心使
用
React
。不过，如果你希望花时间了解应用场景背后的具体细节，那么将会有助于
提高开发效率，特别是在查找代码
Bug
时。这也是本章的目标：了解
React
内部的运行
机制。
建立页面
为了在浏览器中使用
React
，我们需要引用两种类库：
React
和
ReactDOM
。
React
库是
用来创建视图的。
ReactDOM
库是用来在浏览器中渲染
UI
的。
ReactDOM
在
0.14
版时，
React
和
ReactDOM
被一分为二独立打包了。发行说明指出：
“
React
的美丽和精髓和浏览器、
DOM
的关联甚少，这个
(
一分为二
)
方式，为编
写能够在
React
和
React Native
应用之间的
Web
版本实现组件共享铺平了道路”。
注
1
React
将不仅限于在浏览器中进行元素渲染，未来的版本将会支持多平台的元素
渲染。
注
1
：
Ben Alpert,
“
React v0.14
”（
http://bit.ly/2nvPHEQ
）
，
React blog, October 7, 2015
。
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I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.