use redux case BEGIN_TO_LOGIN : { let cartState = { ...state, userInformation: [...state.userInformation, action.payload] } beginner redux, if the new state is the same as the existing state, ...
modified isAuth to true, after clicking login on the login page, but the page did not jump to dashboard? Auth.js import React, { Component } from react import { Redirect } from react-router-dom import { connect } from react-redux import ...
@ connect in react-redux, why can you get the properties in the object directly, while connect (mapStateToProps, mapDispatchToProps) (App) has to get the properties in the object manually? For example: const initialState = { isAuth: false, us...
import React from react import { connect } from react-redux import { addToCart } from .. actions cart-actions let AddTodo = ({ dispatch }) => { let input = ; return ( <div> <form o...
import const store = applyMiddleware(ReduxThunk)(createStore)(reducers); const App = connect( state => (state), dispatch => ({ action: bindActionCreators(actions, dispatch) }) )(Component); const mountPoint = document.creat...
import React from react import ReactDOM from "react-dom"; import { createStore, applyMiddleware, compose, combineReducers } from redux import { Provider } from react-redux import App from . modules App const initialState = {...
I send dispatch, in the AddTodo.js file import React from react import { connect } from react-redux import { addToCart } from .. actions cart-actions let AddTodo = ({ dispatch }) => { let input return ( <div> ...
after obtaining the video address, put it in src= {videoUrl} here render(){ const _self = this; let examineTag = _self.state.examineTag; let videoShowStyle = { float: left } let videoShowStyl...
excuse me, jump from page A to page B, pass the value with state, and state will be empty after page B is refreshed. How to solve it? A page pass value code render: (text, record, index) => { const path = { pathname: goods-deta...
problem description for example, I have a list page with the current address something list?page=1, when I click on the next page, the address becomes something list?page=2. I hope that by clicking the browser s back button at this time, I will be ab...
let patentListDefault={ list:[], count:0, isLoading: false, } export const patentDatas = (state=patentListDefault, action = {}) => { let imuDataList; let imuItem; switch(action.type){ case SAVEPATENTLIST : ...
problem description use the ant-design-pro template. https: github.com ant-design. if you want to request menu data from the background, the data can be obtained correctly, and the state changes are also correct, but when the page is rendered, the ...
reducer in redux performs a minus one operation export default (state = initialState, action) => { const {total} = state switch(action.type){ case ActionTypes.ADD: return {...state, total: total + 1} case ActionTypes.SUBT...
problem description I want the whole StackNavigator to be included in the Provider, so all my controllers should be able to share the store, but I directly find that the controllers in it are not connected the environmental background of the problem...
redux rookie, want to write a demo, with react-redux click login to transfer data index.js: const store = createStore(reducer) ReactDOM.render( ( <Provider store = {store}> <Router> <div> ...
problem description error message: Store does not have a valid reducer. Make sure the argument passed to combineReducers is an object whose values are reducers. the environmental background of the problems and what methods you have tried I put re...
configure https: github.com gaearon re. according to the document. When you modify the name field of state in the file, the page will not be updated, but the button text, page in the render function will be updated. "dev": "webpack-dev...
A breadcrumb navigation function that encapsulates a separate component. When you close the current tab, you need to jump to the previous path. I consider passing history when the parent invokes this component, and then I can jump through histor...
what is the implementation principle of react state? Is there a boss who can explain? Or is there a good article in more detail? Ask for an answer? ...
it goes something like this: is going to use react-saga as the asynchronous solution, but because it is a React-Native project, needs to call some native interfaces in the view layer component after many requests are successful, so the view layer nee...
an error was reported when executing the grunt command. Node, npm and grunt were all reinstalled, but it still didn t work. Is there any god to help see what the reason may be? Loading "Gruntfile.js " tasks.ERROR > > Error: ENOENT: no such file or d...
how to use a browser to simulate an old version of ios firmware when developing front-end mobile devices, there are limitations and there are not so many different versions of real machines that can be simulated. sometimes it s awkward when you want...
filename unicode filename.encode( utf-8 ).decode( unicode_escape ) "2018Prime.pdf" ...
problem description the web2app, packaged by MUI has used the official method of clearing the cache provided by mui, but it still can t clear the cache, and some things can t be updated. plus.cache.clear (function () { alert("") }); l...
using the database connection pool to write code for batch operations (with transactions), always put conn.setAutoCommit (false); first. if there is an exception in the submitted code, conn.rollback () is executed. Do I need to set up setAutoCommit (t...