标签:hello fun imp mys ons ddl creates 地狱 项目
每当提到Dva的时候,总会提到这个概念,就去扒文章找到这个比较好理解的;
定义: 一个中间件,也是异步解决方案,可以用来代替redux-thunk;
用途: 当项目比较大的时候,异步操作在action中会显得混乱,此时用saga来作统一的异步处理;
好处: 避免回调地狱,代码比较整齐;
import { createStore, applyMiddleware } from ‘redux‘
import createSagaMiddleware from ‘redux-sage‘;
import reducer from ‘reducers‘;
import mySage from ‘./sagas‘;
const sagaMiddleware = createSagaMiddlaware();
const store = createStore(
reducer,
applyMiddleware(sagaMiddleware);
)
// then run the saga
sagaMiddleware(mySaga);
saga.js:
export function* helloSaga(){
//console.log(‘hello sage‘)
yield console.log(‘1‘);
yield console.log(‘2‘);
}
var sagaGen = helloSage(); //写成对象形式,若直接helloSage().next()则结果一直是1,停留在第一个yiled后面
conosle.log(sagaGen.next()) //1
conosle.log(sagaGen.next()) //2
标签:hello fun imp mys ons ddl creates 地狱 项目
原文地址:https://www.cnblogs.com/naniandongzhi/p/10600034.html