December 2017
Intermediate to advanced
329 pages
6h 9m
Chinese
Content preview from React学习手册
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312
｜
第
12
章
现在
Express
应用程序已经包含能够响应
HTTP
请求的若干端点了，我们将会修改前端
的
Action
生成器来和这些端点交互。
采用了
Redux Thunk
的
Action
客户端
/
服务器端交互的问题之一是延迟问题，或者发送一个请求后用户等待响应时
经历的延迟。我们的
Action
生成器在能够分发
Action
之前需要等待一个响应，因为在
我们的解决方案中，
Action
自身是从服务器端被发送到客户端的。
Redux
有一个可以
帮助用户处理异步
Action
的中间件，它被称为
redux-thunk
。
在下一节中，我们将会使用
redux-thunk
重写
Action
生成器代码。这些
Action
生成器
被称为
thunks
，它允许用户在分发本地
Action
之前等待服务器端响应。
thunks
是由一
些高阶函数组成的。和
Action
对象相反，它们会返回其他函数。接下来将安装
redux-
thunk
：
npm install redux-thunk --save
redux-thunk
是中间件，它需要被集成到
storeFactory
中。首先，在
./src/Store/index.js
文件的顶部，导入
redux-thunk
：
import thunk from 'redux-thunk'
storeFactory
包含一个名为
middleware
的函数。它返回的中间件将会以单个数组的形
式被集成到新的
Store
中。我们可以添加任意
Redux
中间件到这个数组中。每个元素都
会被作为参数传递给
applyMiddleware ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
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.