December 2017
Intermediate to advanced
329 pages
6h 9m
Chinese
Content preview from React学习手册
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10
｜
第
1
章
ly/1O5DTlX
）进行安装，同时用户可以将它作为插件安装到
Firefox(
https://mzl.
la/2mMVgi5
)
浏览器上。
图
1
-
2
：使用开发者工具浏览相关元素
如果用户发现
react-detector
或者
show-me-the-react
处于激活状态，那么可以打开开发
者工具了解该网站采用
React
技术的详细情况。
安装
Node.js
Node.js
是
JavaScript
独立于浏览器的运行环境。该运行环境可以用于构建全栈式的
JavaScript
应用。
Node
是一个开源项目，可以安装在
Windows
、
macOS
、
Linux
，以及
其他平台。我们将会在第
12
章搭建
Express
服务器时用到
Node
。
用户不需要通过
Node
来使用
React
库。不过当使用
React
进行开发时，用户需要使用
Node
包管理器（即
npm
）来安装项目依赖。它是安装
Node
过程中一起自动安装的。
如果你不能确定自己的电脑上是否安装了
Node.js
，那么可以打开终端或者命令行窗
口，然后输入如下命令：
$
node -v
Output: v7.3.0
理想情况下，用户应该会得到一个高于
4
的
Node
版本号。如果用户输入上述命令之后
获得了“
Command not found,
”这样的信息提示，那么说明该用户机器上还没有安装
Node.js
。解决的办法也非常简单，用户直接用浏览器打开
Node.js
官方网站（
http://
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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.