Redux是一个用于JavaScript应用程序的可预测状态容器。它可以帮助我们管理应用程序的状态,并使状态的变化变得可追踪和可预测。在使用Redux从wp-rest-api获取帖子详细信息页面时,可以按照以下步骤进行操作:
npm install redux react-redux redux-thunk
createStore
函数来创建store,并传入应用程序的根reducer。例如:import { createStore, applyMiddleware } from 'redux';
import thunk from 'redux-thunk';
import rootReducer from './reducers';
const store = createStore(rootReducer, applyMiddleware(thunk));
import { GET_POST_SUCCESS, GET_POST_FAILURE } from './types';
const initialState = {
post: null,
error: null,
};
const postReducer = (state = initialState, action) => {
switch (action.type) {
case GET_POST_SUCCESS:
return {
...state,
post: action.payload,
error: null,
};
case GET_POST_FAILURE:
return {
...state,
post: null,
error: action.payload,
};
default:
return state;
}
};
export default postReducer;
thunk
中间件来处理异步操作。例如:import { GET_POST_SUCCESS, GET_POST_FAILURE } from './types';
export const getPost = (postId) => async (dispatch) => {
try {
const response = await fetch(`https://api.example.com/posts/${postId}`);
const data = await response.json();
dispatch({
type: GET_POST_SUCCESS,
payload: data,
});
} catch (error) {
dispatch({
type: GET_POST_FAILURE,
payload: error.message,
});
}
};
react-redux
库中的connect
函数来实现。例如:import { connect } from 'react-redux';
import { getPost } from './actions';
const PostDetail = ({ post, error, getPost }) => {
useEffect(() => {
getPost(postId);
}, []);
if (error) {
return <div>Error: {error}</div>;
}
if (!post) {
return <div>Loading...</div>;
}
return (
<div>
<h1>{post.title}</h1>
<p>{post.content}</p>
</div>
);
};
const mapStateToProps = (state) => ({
post: state.post.post,
error: state.post.error,
});
export default connect(mapStateToProps, { getPost })(PostDetail);
import React from 'react';
import PostDetail from './PostDetail';
const PostDetailPage = ({ match }) => {
const postId = match.params.id;
return (
<div>
<h1>Post Detail Page</h1>
<PostDetail postId={postId} />
</div>
);
};
export default PostDetailPage;
这样,当访问帖子详细信息页面时,Redux会处理获取帖子详细信息的过程,并将获取到的数据存储在Redux store中。帖子详细信息页面会从Redux store中获取帖子数据,并进行展示。
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