reducers Questions
6
Solved
I have a reducer whereby I am retuning the appropriate state when an action is dispatched. Now I am calling an API at regular intervals so the result will trigger an action again and again. So what...
Cleanse asked 25/10, 2016 at 8:58
8
Solved
I'm currently learning React and I am trying to figure out how to use it with Redux for building a mobile app. I'm kind of confused on how the two are related/usable together. For example, I comple...
Rossetti asked 14/4, 2016 at 19:1
9
Solved
Haven't been able to find anything around here regarding this error:
"Store does not have a valid reducer. Make sure the argument passed to combineReducers is an object whose values are reducers...
7
Solved
is it possible to dispatch an action in a reducer itself? I have a progressbar and an audio element. The goal is to update the progressbar when the time gets updated in the audio element. But I don...
7
Solved
Code speaks better than language, so:
['a', 'b', 'c'].reduce((accumulator, value) => accumulator.concat(value), []);
The code is very silly and returns a copied Array...
TS complains on conc...
Intrench asked 9/1, 2019 at 19:33
2
Solved
I have a ReactJS app with filters and use a RESET function for resetting those filters.
What I also use: Redux, Redux Persist and React-router-dom.
If I have a look at the Redux Devtools, it seem...
Fogbound asked 26/5, 2020 at 9:53
7
Solved
I am designing a profile page for my site using ReactJS.
Now my question is how do I upload the image from local machine and save it to the database and also displaying it in the profile page
imp...
Whereto asked 15/5, 2019 at 12:49
2
Solved
Using Redux in React I'm having a warning that the default parameters should be last default-param-last. on the line where I created the const warehouse. is there wrong on how I created the code? o...
Algeciras asked 8/6, 2020 at 9:49
2
I am wondering how can I return object of the same type as reducer function:
function storeReducer(
state = INITIAL_APPLICATION_STATE,
action: Actions
): ApplicationState {
switch (action.type)...
Downstage asked 24/2, 2019 at 15:0
6
Solved
I'm not a Javascript expert so I wondered if anyone has an "elegant" way to combine multiple reducers to create a global state(Like Redux). A function that does not affect performance when a state ...
Shirley asked 5/12, 2019 at 17:54
1
Solved
In this project I'm using React.createContext() methode to manage the state.
I can access to the state data by importing the Context.Consumer and using this consumer in the return methode of the c...
Wendolynwendt asked 29/11, 2020 at 14:11
3
My action creator is not calling my reducer. Any help will be much appreciated.
types.js
export const SELECTED_FOOD = 'selected_food';
index.js (action creator / action)
import {
SELECTED_FO...
Parnell asked 12/3, 2017 at 2:24
1
Solved
When using react-devtools it tells me that the reason my root component re-renderd was because hooks changed?
when I remove any useSelectors, my root component renders only once, when enabled it re...
Edan asked 2/10, 2020 at 21:47
2
I am trying to find out how to design the NgRx store when the server response is paginated.
if we keep only 1 page at the time in the store then what is the point of using NgRx at all?
if we keep...
Angleworm asked 15/5, 2020 at 6:14
1
What does the shuffling phase actually do?
Possibility - A
As shuffling is the process of bringing the mapper o/p to the reducer o/p, it just brings the specific keys from the mappers to the parti...
1
I have an application without redux, I handle the global state with hooks and the hook useReducer + context. I have 1 useReducer which makes like a Redux store. But to do this I can only send 1 red...
Magi asked 10/4, 2019 at 19:55
1
Solved
I've built a global state provider context, and a reducer with the useReducer Hook. I'm realizing that combining multiple reducers like I would in redux is problematic. Is there a good way to do th...
2
I don't understand what reduce-reducers is meant for. Should it be used in the case that I have 2 reducer functions containing the same action?
function reducerA(state, action){
switch(action.ty...
3
Solved
I have a todo list and want to set the state of that item in the array to "complete" if the user clicks on "complete".
Here is my action:
export function completeTodo(id) {
return {
type: "COM...
Etymologize asked 7/12, 2016 at 13:20
2
Solved
Overview (simplified):
In my NodeJS server I've implemented the following GraphQL schema:
type Item {
name: String,
value: Float
}
type Query {
items(names: [String]!): [Item]
}
The client...
2
Solved
I am trying my hands on ngrx library for managing the state of my application. I have gone through many ngrx documents and git pages. I understand that there are three important concept:
Store
Re...
Mccann asked 11/6, 2017 at 5:35
0
Using ngrx/redux, and following the ngrx example app as close as possible. Now I'm doing this somewhere in the application:
get totalItems (): number {
return sumBy(this._data.items, 'metadata.va...
3
I do not know how to access a boolean isLoading flag from reducerForm.js reducer in reducerRegister.js. I have used combineReducers() and I use isLoading to disable a button during form submit.
It...
Cenesthesia asked 15/2, 2017 at 1:37
1
Solved
In this Redux: Colocating Selectors with Reducers Egghead tutorial, Dan Abramov suggests using selectors that accept the full state tree, rather than slices of state, to encapsulate knowledge of th...
Codfish asked 22/12, 2016 at 1:20
3
Solved
I am new to react/redux. I am trying to figure out how all the pieces in redux interact. The one thing giving me trouble is understanding the relation between actions and reducers. When an action i...
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