Most voted "redux" questions
Redux is a state container for Javascript applications, based on the Flux application architecture.
Learn more…67 questions
Sort by count of
-
4
votes2
answers86
views"Child already has a Parent, it must be Removed first" when sending new object to Reducer
I have a table where I want to sort your data. The table is copulated through the values of this useSelector() const users = useSelector(state => state.userStates.users) When the user clicks on…
-
3
votes1
answer370
viewsHow to validate an array if it has objects inside it or not? React JS
I have a code made using React JS and it works like this, I have a select component, and this is reused several times and the information it receives always comes from an array, only now I need to…
-
2
votes2
answers407
viewsHow to fire a Redux Action without a React
Hi, I’m creating a Interceptor to the Xios which, if my Answer case there is an error with the status Forbidden (403) the same need to trigger the Action that starts the user’s logoff to force him…
-
2
votes1
answer2373
viewsError: Module not found: Can’t resolve 'React-Redux' in
When I try to run the application through yarn returns the following error: I reinstalled the package yarn add react-redux and npm install --save redux Page code that is giving error: import React,…
-
1
votes1
answer2549
viewsHow can I change the state of an array item in React Native
I have a list that is loads after the return of the api, this list populates a Flatlist. By clicking on any item I would like to mark it with the status that was viewed: user How can I change only…
-
1
votes1
answer579
viewsWhy use Redux to request the API in React?
I started to see React well before learning how to use Redux and always requested in the API using a Fetch or Axios in the component itself. Today I already venture into the world of Redux and come…
-
1
votes1
answer653
viewsWhen to use Redux and state in React
I realized that we can use Redux and State to work on React. When to use one or the other?
-
1
votes1
answer480
viewsReact using Redux, not saving application status
I’m trying to implement redux in my app Web react, does not give any error but also does not work, when I try to capture state is as undefined structure: App.js Routes.js store/actions.js…
-
1
votes1
answer172
viewsRecover item index in list to delete
I’m trying to make a demo application for bookmark registration (Bookmarks). I can retrieve in a list what I type in the 3 inputs I have on my screen (Description, URL and tag), and I can include as…
-
1
votes1
answer73
viewsHow to update Redux’s global status in an React application after posting to the API?
An React form that you enter with name and text. The application uses Redux global state, it pulls an Axios API and posts to the API with the form data. When I do a new post I want to update the…
-
1
votes1
answer172
viewsReact - Redux, how can I modify a complex object?
I am trying to modify some properties of an array through an index coming from mine payload. The code below goes through the array looking for the index and tries to modify its properties. This even…
-
1
votes0
answers233
viewsProblem with actions in reduxsauce
I’m making a simple revenue registration app in React Turn on and I’m using Redux with Duck Pattern and reduxsauce, follow the code: //DUCK DE RECEITA import { createActions, createReducer } from…
-
1
votes0
answers228
viewsRun Redux Saga on startup
I created an offline app first to perform offline actions and send when online, and it works fine, but when the app closes and restarts the action queue does not perform because whoever checks the…
-
1
votes1
answer47
viewsHow do I know whether or not to update a component?
I’m using the React, React Native and Redux to make an app. I tried to study a little about the life cycles of a component but ended up getting confused about the various options present when…
-
1
votes1
answer174
viewsReact, Redux, Mobx] What is the best way to manage status with paging?
I use mobx, and now also Hooks, to manage application status (if using Redux would face the same problem), and couldn’t find a better way to manage paginated listings. If I have a list in the global…
-
1
votes0
answers35
viewsHow to manage the state of a variable without calling the API
With the reducer: import { HIDE_MENU, ESTADO_MENU } from '../actions/types'; const initialState = { open: true } export default function (state = initialState, action) { switch (action.type) { case…
-
1
votes0
answers224
viewsReact: Uncaught (in Promise) Typeerror: Dispatch is not a Function
Hello, For some reason I make a call and I get the desired return, but it gives an error of Dispatch, I’ve tried several things and nothing works. My action: export const formulariosExternos =…
-
1
votes0
answers35
viewsReact Native - Redux or Context API, how and why?
Hello, my code he needs to send a text to another screen, according to the checkbox that is marked. The message that should be sent to another screen must be the one in which had the highest "grade"…
-
1
votes0
answers31
viewsDoubt about the Redux-React store
I have three rooms: import { combineReducers } from 'redux'; import formularios from './formReducer'; import userLogin from './userReducer'; import errorReducer from './errorReducer'; export default…
-
1
votes1
answer583
viewsReact-router <Redirect> does not work
I’m doing an application in React and I want to make a check, if the guy is authenticated, redirect directly to Home, if not, goes to the Login screen, this is the Code: userReducer.js const…
-
1
votes1
answer82
viewsWhat is the best practice in using Redux for small projects?
Good night. I am starting a project in Reactjs an ERP Web containing basic registrations of people, products, orders. I will use Redux for the benefits of state sharing between the components, but…
-
1
votes1
answer50
viewsReact/Redux - Function connection
Hello! I have a file containing a single function, it should return a boleano from a condition using the data from the Redux Storage. I can connect the file without being a Reactcomponent to Redux?…
-
1
votes0
answers80
viewsRedux Hooks Reactjs - Trying to create a structure
I’m trying to create a login structure using Redux and Hooks in React.js. But I’m having an error that I’m not being able to understand why. Who knows good Javascript can help me. The reference…
-
1
votes0
answers26
viewsReact Redux: How do I map two objects to each correctly rendered child component using mapStateToProps and mapDispatchToProps?
A child component is rendered by map in the parent component... Via props, in the child component, I receive two objects and I would like that data to be rendered in the right component that is…
-
1
votes0
answers53
viewsReact and Redux, call with Dispatch to re-loop causing class-based component
My application combines React and Redux I have a class-based component called Login.js, a Slice called settingsSlice.js, and I’m using connect to access the state of that component. My files:…
-
0
votes2
answers77
viewsReact Redux initState
It’s common when you work with Redux set an initial state, example: const initState = { pagInicial:1, pagAtual:1, maxLinks:2, maxReg:5 } So far so good. Now and when I need an initial state,…
-
0
votes1
answer178
viewsRun function managed by Redux
My app React Native is managed by Redux. I need to perform the function _verificaLogin() coming by connect automatically when my app is rendering. The way I did it’s not working, I think the props…
-
0
votes2
answers1964
viewsHow to delete an element by Key in React?
This is the code generated, because the list is created by the routes of the pages, I would like to know a way to delete a specific Navlink, either by key or otherwise definitely, this Navlink…
-
0
votes1
answer121
viewsIs it possible to fire two types of action at Redux at the same time?
I’m using Redux and Redux-saga in an application with React and with doubt when it comes to displaying the load to the user when a saga is launched. I don’t know if this is good practice, but I was…
-
0
votes0
answers150
viewsDelete child node in firebase with React-Native and Redux
Does anyone know how to delete an item from a Listview in React-Native using firebase as a database? In case I want to delete only the item marked in the print below:…
-
0
votes1
answer78
viewsHow to remove an item dynamically from an object?
I’m using a state of reducer, containing an object in this format: x = {10: {nome: 'lucas'}, 20:{nome: 'beraldo'}} <br/> And, I get an id via action. I’d like to do something like…
-
0
votes0
answers22
viewsReact&redux - Feathers-Rematch snapshotPlugin error
I am assisting in the development of an "APP" using Reactjs and Redux, Feathersjs... The whole project runs 100% on the Mac, but when you do git pull and run on Windows the project has a snapshot…
-
0
votes1
answer1519
viewsError: "Uncaught Syntaxerror: Unexpected token import" in javascript
good afternoon, I have the following program: testing.html: <!doctype html> <html lang="en"> <head> <meta charset="utf-8"> <title> Testando </title> </head>…
-
0
votes1
answer527
viewsCallback with Redux-thunk
I’d like to know how to get a call back from dispath something like this, this with React: this.props.store.dispatch(dados, result => { console.log(result); }); On this line above the console.log…
-
0
votes1
answer2051
viewsDifference and good practices, either global or React Native context
I’m new to React Native and would like to understand in an objective way: What’s the difference between using global.variavel = foo; or create a context api? 'React recently implemented Context Api…
-
0
votes0
answers38
viewsDispatcher does not recognize payload React Native Redux
When trying to save a new state in the Redux store it says that such a variable does not exist. Dispatcher (where it points to error): export const valorMdoisD = () =>{ return{ type: ALIGN_M,…
-
0
votes1
answer203
viewsReact Native only works with 2 clicks
In this code, the function only works after being called twice. ubernehmen = () => { this.setState({wert: ((this.state.cor*208)+(this.state.letra*8)}) this.setState({werta:…
-
0
votes1
answer164
viewsRedux, how to access store state variables in functions
Hi, my question is if I can access store variables in functions, something like: --usuarioReducer.js-- const initialState = { usuario: {}, isAuth: false } --root.js-- import { Redirect } from…
-
0
votes0
answers10
viewsIn which cases do I want to use mapDispatchToProps or mapStateToProps from Redux?
I looked in several places to know the difference between the two but found no place that could explain me clearly.
reduxasked 3 years, 7 months ago Eduardo Gomes Heleno 1 -
0
votes2
answers676
viewsPersist currentUser firebase with React Native
This function is triggered by clicking the Login button: export const loginUser = ({ email, password }) => { return (dispatch) => { dispatch({ type: LOGIN_USER });…
-
0
votes1
answer603
viewsHow to get the status of a React within a React Native
Hello, I’m new to React Native and I’m having problems to pass the status of a Reducer to a component I made. the same is as follows: import React from 'react' import { connect } from 'react-redux'…
-
0
votes1
answer863
viewsReact Native error: Undefined is not a Function
I’m having a bug in React React Native error: Undefined is not a Function import React, { Component } from 'react'; import { View, Text, StyleSheet } from 'react-native'; import { connect } from…
-
0
votes0
answers40
viewsRedux with multiple application instances
If Redux maintains a single component state and I have multiple instances of the application being used by multiple users, this means that users will view the same state in components? How to solve…
-
0
votes2
answers1146
viewsHow do I pass the value to: "this.props" - React Native
I started studying React Native in version 0.55.4, and it seems to have changed a few things in the most current version (0.59.8), now I’m having difficulty passing/assigning values in the…
-
0
votes1
answer144
viewsError trying to export a constant in React
I have created this: const funcionarioReducer = (state = [], action) => { switch(action.type) { case 'ADD_FUNCIONARIO': return state.concat([action.data]); default: return state; } } export…
-
0
votes1
answer25
viewsComponent is not being rendered
In my app.jsx file I have the import of the component "activities": import React from 'react' import { Container } from 'semantic-ui-react' import atividades from '../atividades/atividades' export…
-
0
votes0
answers31
viewsIs it possible to create a handleChange for a form that takes the values of a Redux store?
Next, I’m creating an app and came across this problem: I have a store set and want to create a data update form in Atlas (Mongodb). But I want this form, already come with the values that are in…
-
0
votes1
answer970
viewsUsedispatch() inside a useEffect() -> *Missing dependency*
ALERT: React Hook useEffect has a Missing dependency: 'Dispatcher'. Either include it or remove the dependency array React-Hooks/exhaustive-deps import React, {useEffect} from 'react' import…
-
0
votes2
answers915
viewsError "Property 'REDUX_DEVTOOLS_EXTENSION_COMPOSE' does not exist on type 'Window & typeof globalThis'."?
When configuring Redux Devtools I get the following Typescript error: Property 'REDUX_DEVTOOLS_EXTENSION_COMPOSE' does not exist on type 'Window & typeof globalThis'. store ts. import {…
-
0
votes1
answer199
viewsReactjs and Redux state does not change
Good afternoon guys I’m beginner and I’m having a problem when it comes to updating my state could help me or give some hint on how I can fix this Home js. import React from 'react'; import {Form,…