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O'Reilly Platform
book
React学习手册
by
Alex Banks
,
Eve Porcello
December 2017
Intermediate to advanced
329 pages
6h 9m
Chinese
China Electric Power Press Ltd.
Content preview from
React学习手册
Redux
|
195
Store
在
Redux
中,
Store
就是保存应用程序
State
数据和处理所有
State
更新的地方。
注
5
同时
Flux
设计模式支持多个
Store
共存,其中每个
Store
只专注于特定的数据集。
Redux
只有
一个
Store
。该
Store
通过将当前的
State
和
Action
传递给单个
Reducer
来进行
State
更新。
我们将会通过组合和合成若干
Reducer
创建一个这样的单个
Reducer
。
如果我们使用
colors
的
Reducder
创建了一个
Store
,那么我们的
State
对象将会是一个数
组,即
colors
数组。
Store
的
getState
方法将会返回最近的应用程序
State
。在示例
8-7
中,我们将会创建一个包含
color
的
Reducer
的
Store
,这样一来用户就可以使用任意
Reducer
创建某个
Store
了。
示例
8-7
:包含
color
的
Reducer
的
Store
import { createStore } from 'redux'
import { color } from './reducers'
const store =
createStore(color)
console.log( store.getState() )
// {}
为了创建一个和图
8-6
类似的单个
Reducer
树,我们必须将
colors
和
sort
的
Reducer
组
合起来。
Redux
有一个专门执行此任务的函数,即
combineReducers
,它会将所有
Reducer
组合到一起,构造单个
Reducer ...
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Publisher Resources
ISBN: 9787519814236