import React from react ; import ReactDOM from react-dom ; import . index.css ; import {createStore,applyMiddleware,compose} from "redux" import thunk from "redux-thunk" import App from . App ; import{counter} from ....
what s the difference between forceUpdate setState? when to use forceUpdate? solve? ...
has been plagued by a problem, that is, the value saved by this redux, . for example, a data structure is obtained through api, but before the fetch comes down, the page will be rendered once. At this time, the data structure does not exist in redux, s...
the specific scenarios are as follows: reducer.js const initialState = { test: [ { id: 1 show: true }, { id: 2 show: true }, { ...
the An and B codes of both models are the same, as follows: export default { namespace: A B , state: {} effects: { *add({payload}, {call, put}){ console.log("") yield put({ type: add , ...
how to store redux information without losing related information after page refresh, do localstorage or cookie local storage? If you are doing local storage, how do you get the relevant redux information after entering the page for the first time? Is th...
java programmers use the project Ant Financial Services Group ant design pro ((hereinafter referred to as pro). Everyone who has used it knows that the menu of the original pro project is defined by a file. I would like to ask how to load the menu json f...
when the effects, of model calls call to request backend data, when the backend data is not returned for a long time, other pages calling methods in effects will not be executed Code to reproduce the issue: (Please provide reproducible code or steps) ...
I am currently using version 1.x of dva, and do not support dispatch effects to handle callbacks with then. I would like to ask how to return promise in the existing version of effects if I do not upgrade to version 2.x. I tried to directly return Prom...
A project under development, based on the ant admin open source project, now has a requirement to establish a socket connection with the backend to automatically update the task status. I have no previous development experience in this area. The project ...
namespaceperformanceconsoleperformance: each field output of the first console is empty, the second console will return the data of the first dispatch request, and the third time will return the data of two dispatch, but the network of the console on...
look at the title, I guess you don t understand, ha, I don t understand either? Let me describe it in detail this is the case. I intend to store a data in redux. This data will be used in some sub-component of the application. The default value ne...
import React from react ; import ReactDOM from react-dom ; import {HashRouter as Router, Route, Switch} from react-router-dom import {createStore, applyMiddleware, compose} from redux import thunk from react-thunk import {Prov...
when the mapDispatchToProps method is passed into the connect, the dispatch in the component is undefined; when the mapDispatchToProps method is not passed into the connect, the dispatch in the component can be obtained Why does this happen? ...
for example, Zhihu app goes to the question page, clicks on the name of a respondent to enter his personal home page, and then enters the question (or other questions) page in his answer. At this point, there are two instances of the problem page in the...
The list is an interface, and then get the specific details according to the id of the list, and then splice the information of the list in redux state. However, if the then after the list request calls the API of details, there is no guarantee that the ...
there is a problem with using mobx: obtain the backend interface data through @ action, then assign a value to @ observable data, and then calculate whether the modal needs to be displayed from data through @ computed modalVisiable. How can I change t...
I just started to learn js,react, and redux, is doing exercises by myself, but I want to transfer the data of store to the state, of react, but it is not successful. Please give me some guidance. what you want to do: transfer the data obtained by API...
class PhotoList{ componentDidMount(){ if(this.props.photos){ reduxphotos this.props.actions.getPhotos() } } } export connect(..)(UserHeader) class App { render(){ return <div> <P...
normal routing page gets redux: container.js react-redux redux-thunk export default withRouter(connect(mapStateToProps, mapDispatchToProps)(couter)); route.js const AppRouter = () => ( <HashRouter> <UI > { ...
is it better to put the transaction in the controller, or in the model, or is there another solution when using TP5 when you need a transaction? If you put it in a model, and multiple models are involved in the process, and the process requires a transac...
class Ball{ const SHAPE = "circular"; public $area = null; } class Football extends Ball{ const PI = 3.14; public $radius; public function __construct($radius){ $this->radius = $radius; } public functio...
problem description as shown in figure the environmental background of the problems and what methods you have tried z-index has been set and does not work ...
what I use now is the cropper.js image clipping plug-in, which is used on the mobile end. I want to set the width of the picture is the width of the screen, and the frame and area of height auto, clipping is also the width of the screen, which is a squa...
problem description I didn t understand when I reported an error when I finally built the project the environmental background of the problems and what methods you have tried npm WARN deprecated browserslist@2.11.3: Browserslist 2 could fail on r...