Questions tagged [redux-reducers]
96 questions
4
votes
3 answers
Bad idea to put a dom operation inside a redux reducer?
I have several actions which use the same reducer, and instead of having a dom operation in each of those actions, I want to just add it once inside my shared reducer. I know reducers are to be pure (which the returned data still is), but is this…
ram
- 528
- 2
- 11
3
votes
2 answers
How can I delete Multiple array items
I'm using React js. I want to add an option to delete multiple items. but after deleting each item, page refreshes the props and not delete remaining items.
How can I delete Multiple items?
const onDeleteAll = arr => {
…
kinza
- 225
- 2
- 9
3
votes
1 answer
How can I sort an array using immer?
I'm trying to add an object to an array in a reducer, and after that, I would like to sort it by date (I can try to insert in order, but I think is more or less the same effort).
I'm using immer to handle the reducer immutability:
const newState =…
teo
- 73
- 5
3
votes
0 answers
How to set initial state for redux reducer in typescript?
I am getting this TypeScript error Property 'hasError' does not exist on type '(state: ErrorType | undefined, action: ErrorActionType) => ErrorType'. which I think its complaining about setting the initialState for reducer.
import { ErrorType,…
Negin Basiri
- 1,071
- 2
- 17
- 37
3
votes
3 answers
Grouping array data according to a id
With a API call i'm receiving a response like below
[
{
stationId: "10"
name: "Jinbaolai"
group: {id: "18", stationGroupName: "Ali"}
},
{
stationId: "13"
name: "Stack"
group: {id: "18", stationGroupName: "Ali"}
},
…
CraZyDroiD
- 5,264
- 21
- 64
- 138
2
votes
1 answer
React createSlice's extraReducers's state access
i have the following code:
import { createSlice, createAsyncThunk } from '@reduxjs/toolkit';
import { client } from '../../api/client';
const initialState = {
logBook: [],
status: 'idle',
error: null
};
export const logNewEntry =…
Hang Lin
- 57
- 6
2
votes
2 answers
How to implement an exhaustive switch statement inside a Redux reducer function using Typescript? How to handle Redux's internal @@redux actions
I've tried to find a definitive answer do this, but haven't found one yet.
There a question here on SO that answers how to implement an exhaustive switch statement:
How do I check that a switch block is exhaustive in TypeScript?
And the answer…
cbdeveloper
- 14,014
- 11
- 57
- 145
2
votes
1 answer
React. get state from another reducer
Hi how can i get the value from another reducer?
const indexReducer = (state = initialState, action) => {
switch (action.type) {
case CALC_BET_AMOUNT:
function calcBetAmount(value) {
switch (value) {
case…
TilikWebDeloper
- 179
- 4
2
votes
0 answers
React reducers, state not updating immediately
i am working on createContext and reducers, with reducers i am updating state value, but it is not updating value at a time, i did console.log(user); in onSubmitSave(), but in console log i am not getting its updated state at a time, i can see it…
taks
- 868
- 9
- 31
2
votes
1 answer
Better way for writing the reducers?
Is there a better way for writing the following code:
export const getItemsSuccess = (state, entity, payload) => {
const {count, rows} = payload
const clonedState = {...state}
clonedState[entity] = {...clonedState[entity], count, rows}
…
Yaniv Or
- 57
- 6
1
vote
2 answers
why my reducer is slow to storage the result?
EDIT:
i have adjusted my code a bit, and now i am pretty sure that my reducer returns undefined at the 'action' no matter what comes in. So I think it is the thunk that is the problem, or the combinereducer. Additionally i have return fixed…
Om Alba
- 11
- 3
1
vote
1 answer
React redux - pushed object in the state is not mapped but initialState is
I am working on some app where you can save a note about a video. I have some redux issues, sorry that I am not specific but I don't know where the problem is. Every time when I am using 'ADD_ITEM' action, everything works fine in the devtools I can…
twolsh
- 11
- 1
1
vote
2 answers
How to pass in the state to the dispatch action if using useState instead of this.state in react?
I am a beginner starting out in react and having difficulties in state management while working with react-redux and useState.
In the below code I am basically following a tutorial which passes in the this.state to the dispatch action createProject…
nikkbh
- 35
- 4
1
vote
1 answer
(React Redux) The whole state restarts and deletes all changes made when I add a new item
The reducer goes like this:
import {
CREATE_COUNTRY,
} from "../actions/actionConsts"
export const storeInitialState = {
countries: [],
otherThings: 0
}
export default function countriesReducer(prevState = storeInitialState, action)…
Rafael
- 1,333
- 3
- 18
- 37
1
vote
1 answer
How do I fix my reducer to return the property value of an object?
I have a reducer in my react native app which ideally should check the state and return if the recipe has been favourited or not. I've tried to create a reducer to return if isFav is true or false for a recipe object in the state. If the recipe is…
Ashley Vaz
- 55
- 6