Redux是一个用于管理应用状态的JavaScript库,可以帮助我们更好地组织和维护前端应用的数据流。使用Redux从自己的API获取数据可以通过以下步骤实现:
npm install redux react-redux redux-thunk axios
// reducer.js
const initialState = {
data: null,
loading: false,
error: null,
};
const reducer = (state = initialState, action) => {
switch (action.type) {
case 'FETCH_DATA_REQUEST':
return {
...state,
loading: true,
};
case 'FETCH_DATA_SUCCESS':
return {
...state,
data: action.payload,
loading: false,
};
case 'FETCH_DATA_FAILURE':
return {
...state,
error: action.payload,
loading: false,
};
default:
return state;
}
};
export default reducer;
// actions.js
import axios from 'axios';
export const fetchData = () => {
return dispatch => {
dispatch({ type: 'FETCH_DATA_REQUEST' });
axios.get('/api/data') // 替换成你的API地址
.then(response => {
dispatch({ type: 'FETCH_DATA_SUCCESS', payload: response.data });
})
.catch(error => {
dispatch({ type: 'FETCH_DATA_FAILURE', payload: error.message });
});
};
};
// index.js
import { createStore, applyMiddleware } from 'redux';
import thunkMiddleware from 'redux-thunk';
import reducer from './reducer';
const store = createStore(reducer, applyMiddleware(thunkMiddleware));
import React, { useEffect } from 'react';
import { connect } from 'react-redux';
import { fetchData } from './actions';
const App = ({ data, loading, error, fetchData }) => {
useEffect(() => {
fetchData();
}, [fetchData]);
if (loading) {
return <div>Loading...</div>;
}
if (error) {
return <div>Error: {error}</div>;
}
return (
<div>
{data && data.map(item => (
<div key={item.id}>{item.name}</div>
))}
</div>
);
};
const mapStateToProps = state => ({
data: state.data,
loading: state.loading,
error: state.error,
});
const mapDispatchToProps = {
fetchData,
};
export default connect(mapStateToProps, mapDispatchToProps)(App);
以上就是使用Redux从自己的API获取数据的基本流程。在实际应用中,你可能需要根据具体的需求进行一些调整和扩展。记得替换示例代码中的API地址为你自己的API地址。
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