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...
applications: image: tianon true nginx: build: context: . nginx args: - PHP_UPSTREAM_CONTAINER=${NGINX_PHP_UPSTREAM_CONTAINER} - PHP_UPSTREAM_PORT=${NGINX_PHP_UPSTREAM_PORT} volumes_from: - applications volumes: - ...
I want to use facets to manage all methods with the first parameter HttpServletRequest request under the controller package. Here is my code: @Pointcut("execution(* com.belfry.bequank.controller.*.*(..))&&args(request,..)") public voi...
since node is single-threaded, if ten users ask the server to query and modify the same data at the same time, node can only handle one request and execute it one by one. let a= test router.get( test match ,function(req,res){ * a* } ...
Chrome browser can view the CSS location of the current element. Can you see the location of the JS method acting on the current element ...
<button> <i class="material-icons"> favorite_border < i>< button> I use Google s material icon just to make my text appear below, and icon gets big . how to center its text vertically? ...