[英]React app not rerender after store state changed
My component is not rerendering after the store is changing.商店更改后,我的组件不会重新渲染。 I make sure that the store is actually changing by dropping him to the console with store.subscribe() and console.log(store.getState()) but still the component is not rerendering again.我通过使用 store.subscribe() 和 console.log(store.getState()) 将他放到控制台来确保商店实际上正在改变,但组件仍然没有再次重新渲染。 I will appreciate your help.我会感谢你的帮助。
configureStore.js配置Store.js
import { createStore, combineReducers } from 'redux';
import home from '../reducers/home';
import favorites from '../reducers/favorites';
export default () => {
const store = createStore(combineReducers({
home,
favorites
}))
return store;
}
App.js应用程序.js
import React from 'react';
import ReactDOM from 'react-dom';
import { Provider } from 'react-redux';
import configureStore from './redux/store/configureStore';
import AppRouter from './router/AppRouter';
const store = configureStore();
const jsx = (
<Provider store={store}>
<AppRouter />
</Provider>
);
ReactDOM.render(jsx, document.querySelector('#root'));
home.js (reducer) home.js(减速器)
const homeDefaultState = {
name: 'someName'
}
export default (state = homeDefaultState, action) => {
switch (action.type) {
case 'CHANGE_NAME':
return {
...state,
name: 'otherName'
}
default:
return state;
}
}
home.js (action) home.js(动作)
export const changeName = () => ({
type: 'CHANGE_NAME'
})
Home.js (component) Home.js(组件)
import React from 'react';
import configureStore from '../../redux/store/configureStore';
import { changeName } from '../../redux/actions/home';
import { connect } from 'react-redux';
const store = configureStore();
const handleName = () => {
store.dispatch(changeName())
}
const Home = (props) => (
<div className="home">
<button onClick={handleName}>
change name
</button>
{props.home.name}
</div>
);
const mapStateToProps = (state) => ({
home: state.home
});
export default connect(mapStateToProps)(Home);
In your Home
component you initialize store for second time.在您的Home
组件中,您第二次初始化 store。 And bound action to this second store并将行动绑定到这家第二家商店
const store = configureStore();
const handleName = () => {
store.dispatch(changeName())
}
At the same time with connect()
you access store declared in App.jsx
同时使用connect()
访问App.jsx
声明的App.jsx
Read from first but update second.从第一个读取但第二个更新。 Just remove second store
and use mapDispatchToProps
( second parameter passed to connect()
) instead:只需删除第二个store
并使用mapDispatchToProps
( 传递给connect()
第二个参数):
const mapStateToProps = (state) => ({
home: state.home
});
export default connect(mapStateToProps, { handleName: changeName })(Home);
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