@acpaas-ui/js-redux-utils 中文文档教程
ACPaaS UI JS Redux Utils
Redux Utils 包提供了一些帮助程序和引导实用程序来简化 redux 设置。
## Installation
NPM
npm install @acpaas-ui/js-redux-utils --save
Yarn
yarn add @acpaas-ui/js-redux-utils
## Import
// ES2015
import { progressReducer } from '@acpaas-ui/js-redux-utils';
## Higher Order Reducers (HOR)
有 3 个 HOR 可用:progress
、basicType
和 target
。 这些 HOR 需要使用 combineReducers
才能工作。
progress
进度 HOR 将状态包装在一个详细说明数据状态的对象中:
{
loading: true/false,
created: 'Thu Feb 15 2018 13:36:31 GMT+0100 (CET)',
lastUpdated: 'Thu Feb 15 2018 13:36:31 GMT+0100 (CET)',
error: 'Custom error',
result: {
id: 'my-item'
}
}
您可以通过在操作中提供 loading
标志或 err
消息来更新状态:
{
type: 'DO_STUFF',
loading: true/false,
err: 'Something went wrong'
}
通过包装您的减速器,您可以控制 result
中存储的内容,而不必担心加载状态。 您只需提供一个类型和一个 reducer 函数:
const myReducer = (state, action) => {
if (action.type === 'STUFF_LOAD') {
return {
...state,
stuff: action.stuff
};
}
return state;
};
const progressReducer = progress('STUFF', myReducer);
progressReducer 只会触发以您提供的类型开头的操作。 我们通过尾部斜杠 /
使用命名空间:
type = 'ARTICLES';
'ARTICLES/LOAD' will match
'ARTICLES/LOAD' will match
'ARTICLES/PAGE' will match
'NEWS_ARTICLES' will not match
'ARTICLES_LOAD' will not match
'ARTICLE/LOAD' will not match
basicType
在许多应用程序中,有类似的数据类型需要最少的功能:
- load an item
- load multiple items
- append new items to the stored items
- clear an item/items
为了避免大量copy pasta redux-utils
包提供了一个非常基本的 HOR 来处理这个用例。
只需提供一个类型(默认为 BASIC_DEFAULT
)和一个(可选的)初始值:
const newsReducer = basicType({
type: 'NEWS'
}, null);
现在您可以使用您作为命名空间提供的类型调度操作来更新新闻类型:
dispatch({
type: 'NEWS/LOAD', // <TYPE>/LOAD
data: { // will always look for a 'data' property
id: '1',
title: 'How cool is this?'
}
});
Data types
默认情况下 basicType
HOR 将假定您正在处理单个项目。 如果您需要处理数组,请将 dataType
选项设置为 list
:
const newsReducer = basicType({
type: 'NEWS',
dataType: 'list',
}, []);
现在您可以使用相同的 LOAD
操作来设置状态:
dispatch({
type: 'NEWS/LOAD',
data: [{
id: '1',
title: 'How cool is this?'
}]
});
或使用LOAD_MORE
操作将新项目附加到状态:
dispatch({
type: 'NEWS/LOAD_MORE',
data: [{
id: '2',
title: 'Need more content.'
}]
});
注意: 当您对单个
数据类型调用LOAD_MORE
操作时,reducer 将回退到LOAD
操作,覆盖状态。
Progress
您可以通过在设置中将 progress
设置为 true
来使用 progress
HOR:
const newsReducer = basicType({
type: 'NEWS',
dataType: 'list',
progress: true,
}, []);
您仍然可以调度 loading
和 < code>error 状态相同:
dispatch({
type: 'NEWS/LOAD',
loading: true,
});
target
目标 reducer 将提供的 reducer 的结果存储在 store 中。 这样,您可以重用 reducer 逻辑,而无需管理额外的复杂层。
{
filters: {
search: {...},
home: {...},
users: {...}
}
}
targetReducer
需要一个 type
、reducer
和可选
const filterReducer = targetReducer({ type: 'FILTERS' }, myFilterReducer, {});
的 initialState
来工作: type
将是使用操作类型验证的命名空间。
Updating a target
您可以通过在分派操作上设置 target
属性来更新目标:
dispatch({
type: 'FILTERS/LOAD',
target: 'search',
filters: [...],
});
状态将相应更新:
{
filters: {
search: [...]
}
}
Progress
您可以通过设置 progress< 将目标包装在
progressReducer
中/code> 到设置中的 true
:
const filterReducer = targetReducer({
type: 'FILTERS',
progress: true
}, myFilterReducer, {});
现在您可以像以前一样发送 loading
和 error
状态:
dispatch({
type: 'FILTERS/LOAD',
loading: true,
target: "search"
});
状态将相应更新:
{
filters: {
search: {
loading: true,
error: null,
result: null,
...
}
}
}
ACPaaS UI JS Redux Utils
The Redux Utils package provides some helpers and bootstrap utils to ease the redux setup.
## Installation
NPM
npm install @acpaas-ui/js-redux-utils --save
Yarn
yarn add @acpaas-ui/js-redux-utils
## Import
// ES2015
import { progressReducer } from '@acpaas-ui/js-redux-utils';
## Higher Order Reducers (HOR)
There are 3 HORs available: progress
, basicType
and target
. The usage of combineReducers
is required for these HORs to work.
progress
The progress HOR wraps the state in an object detailing the status of your data:
{
loading: true/false,
created: 'Thu Feb 15 2018 13:36:31 GMT+0100 (CET)',
lastUpdated: 'Thu Feb 15 2018 13:36:31 GMT+0100 (CET)',
error: 'Custom error',
result: {
id: 'my-item'
}
}
You can update the status by providing the loading
flag or an err
message in your action:
{
type: 'DO_STUFF',
loading: true/false,
err: 'Something went wrong'
}
By wrapping your reducer, you maintain control over what is stored in the result
, without having to bother with the loading state. You just have to provide a type and a reducer function:
const myReducer = (state, action) => {
if (action.type === 'STUFF_LOAD') {
return {
...state,
stuff: action.stuff
};
}
return state;
};
const progressReducer = progress('STUFF', myReducer);
The progressReducer will only trigger for actions starting with the type you provided. We use namespacing by trailing slash /
:
type = 'ARTICLES';
'ARTICLES/LOAD' will match
'ARTICLES/LOAD' will match
'ARTICLES/PAGE' will match
'NEWS_ARTICLES' will not match
'ARTICLES_LOAD' will not match
'ARTICLE/LOAD' will not match
basicType
In a lot of applications there are similar data types that require a minimum of functionality:
- load an item
- load multiple items
- append new items to the stored items
- clear an item/items
To avoid a lot of copy pasta the redux-utils
package provides a very basic HOR to handle this use case.
Simply provide a type (defaults to BASIC_DEFAULT
) and an (optional) initial value:
const newsReducer = basicType({
type: 'NEWS'
}, null);
Now you can update the news type by dispatching actions using the type you provided as a namespace:
dispatch({
type: 'NEWS/LOAD', // <TYPE>/LOAD
data: { // will always look for a 'data' property
id: '1',
title: 'How cool is this?'
}
});
Data types
By default the basicType
HOR will assume you are handling a single item. If you need to handle arrays, set the dataType
option to list
:
const newsReducer = basicType({
type: 'NEWS',
dataType: 'list',
}, []);
Now you can use the same LOAD
action to set the state:
dispatch({
type: 'NEWS/LOAD',
data: [{
id: '1',
title: 'How cool is this?'
}]
});
or use the LOAD_MORE
action to append new items to the state:
dispatch({
type: 'NEWS/LOAD_MORE',
data: [{
id: '2',
title: 'Need more content.'
}]
});
Note: When you call the LOAD_MORE
action on a single
data type, the reducer will fallback to the LOAD
action, overwriting the state.
Progress
You can use the progress
HOR by setting progress
to true
in the settings:
const newsReducer = basicType({
type: 'NEWS',
dataType: 'list',
progress: true,
}, []);
You can still dispatch loading
and error
states the same way:
dispatch({
type: 'NEWS/LOAD',
loading: true,
});
target
The target reducer stores the result of the provided reducer for the provided target in the store. This way, you can reuse reducer logic and without having to manage an extra layer of complexity.
{
filters: {
search: {...},
home: {...},
users: {...}
}
}
The targetReducer
expects a type
, reducer
and optional initialState
to work:
const filterReducer = targetReducer({ type: 'FILTERS' }, myFilterReducer, {});
The type
will be the namespace verified with the action type.
Updating a target
You can update targets by setting the target
property on the dispatched action:
dispatch({
type: 'FILTERS/LOAD',
target: 'search',
filters: [...],
});
The state will be updated accordingly:
{
filters: {
search: [...]
}
}
Progress
You can wrap your targets in a progressReducer
by setting progress
to true
in the settings:
const filterReducer = targetReducer({
type: 'FILTERS',
progress: true
}, myFilterReducer, {});
Now you can dispatch loading
and error
states the same as before:
dispatch({
type: 'FILTERS/LOAD',
loading: true,
target: "search"
});
The state will be updated accordingly:
{
filters: {
search: {
loading: true,
error: null,
result: null,
...
}
}
}