reselect Questions
3
Solved
In redux-toolkit docs they suggest you to create the following definition to have proper types when you use useSelector hook:
export const useAppSelector: TypedUseSelectorHook<RootState> = us...
Edessa asked 18/4, 2021 at 6:50
4
Solved
I've been using object-oriented programming practices for 25 years and trying to move toward functional programming for the last 5 years, but my mind always goes towards OOP when I'm trying to do s...
Transpose asked 30/4, 2017 at 10:51
5
Solved
I'm having a pretty complex selectors structure in my project (some selectors may have up to 5 levels of nesting) so some of them are very hard to test with passing input state and I would like to ...
Sweetener asked 15/4, 2019 at 20:8
8
Solved
How do I pass additional parameters to combined selectors? I am trying to
• Get data
• Filter data
• Add custom value to my data set / group data by myValue
export const allData = state => s...
Ailurophile asked 27/10, 2016 at 17:44
2
Solved
I use redux-toolkit to generate selectors. I want to use them in my own custom reselect selectors with parameters. But I do not know how to type the return type of my selector?
const selectOrganiza...
Bellona asked 9/3, 2021 at 18:57
6
I have a selector:
const someSelector = createSelector(
getUserIdsSelector,
(ids) => ids.map((id) => yetAnotherSelector(store, id),
); // ^^^^^ (yetAnotherSelector expects 2 args)
That y...
Ballarat asked 21/6, 2018 at 9:25
3
Solved
Selectors are efficient. A selector is not recomputed unless one of its arguments changes.
I'm trying to debug a selector that is being called more often than expected. Is there a way to log wh...
Brentwood asked 17/12, 2019 at 14:29
3
Solved
I try to use selectors from reselect library in my Redux app.
my selectors file looks:
import { createSelector } from 'reselect'
const postsSelectors = state => state.global.posts.allPostse;
...
Zurn asked 16/2, 2017 at 20:15
1
For memoization/performance consideration, using useSelector with ShallowEqual.
Will there be some more benefits for performance optimization using "Reselect/createSelector" option ?
Or b...
Deterrent asked 1/3, 2021 at 16:35
2
Solved
How can I memoize my rawTranscript variable so it doesn't trigger the useEffect below which subsequently triggers the expensive transcriptParser function? I've been trying a lot of different approa...
Yvetteyvon asked 22/8, 2021 at 14:2
3
Solved
I want to use the reselect with redux-form to get the value from redux. the problem is I don't know how to combine the getFormValues with reselect. it seems that I cannot access the state in the cr...
Solidary asked 6/3, 2018 at 0:3
2
I am using reselect lib in my React project.
I've created Posts selector which works fine. Here's the code
// selectors.ts
const getPosts = (state: RootState) => state.posts.posts;
export cons...
Kemberlykemble asked 26/5, 2021 at 5:40
2
Solved
My app already has a large collection of selectors used by the various container objects. These are great for accessing different parts of the state and make refactoring the state much easier.
Now...
4
The app I'm creating has a lot of entities and relationships (database is relational). To get an idea, there're 25+ entities, with any type of relations between them (one-to-many, many-to-many).
T...
Killarney asked 28/7, 2017 at 12:20
1
A standard reselect selector invalidates its memoized value and recomputes it if the input selectors fail a strict equality check:
export const selectEmailsFromComments = createSelector(
selectCo...
Magnolia asked 20/6, 2020 at 0:7
1
Solved
I have built an app on ReactJS 16.8.5 and React-Redux 3.7.2. When the app loads the app mounts, initial store is set and database subscriptions are set up against a Firebase Realtime Database.
The...
Augean asked 24/4, 2020 at 9:45
3
Solved
I came across an example, where the mapStateToProps function is using memoization. I was just wondering how the "state" parameter is passed onto memoized selectors. After looking at the docs for re...
Syreetasyria asked 10/1, 2017 at 13:37
1
Solved
I want to create a memoized selector which will update automatically when the state in the redux store changes.
I read about Reselect's createSelector here:
https://redux.js.org/recipes/computing...
Impresa asked 24/12, 2019 at 7:35
2
Solved
I use reselect to get parts of my redux state. i have a list of objects in my state. One of my subselector for my create selector is a filter function of this list:
state => state.list.filter(f...
Equestrian asked 20/6, 2016 at 8:47
2
Now I'm working in react-redux. I'm trying to get questions from state one-by-one. Generated unique ID to store the questions in the state, after user submits,answer also store with the question.
...
Sanskrit asked 1/3, 2017 at 21:57
0
The Situation
Using react redux, in mapStateToProps for one of my container components, I pass down an object with 8+ keys for the sake of convenience. (I am aware that passing objects down is an ...
Newfashioned asked 17/10, 2019 at 20:52
0
First of all, I have already gone through:
/react-redux/issues/779
Stackoverflow / React Redux rerenders when creating arrays
Stackoverflow / How to deal with relational data in redux?
Redux / Rec...
Vookles asked 2/8, 2019 at 6:34
1
Solved
I’m trying to understand how the reselect method createStructuredSelector works in Typescript. I see this pattern a lot:
export interface SomeProps {
readonly property1: string;
readonly propert...
Saline asked 28/12, 2018 at 19:49
2
Solved
I am trying to integrate reselect into my current app and as always , first i begin to read documentation and then if it needed , another recources.I couldn't understand one special part of documen...
Scyros asked 2/10, 2018 at 11:35
1
Solved
I am implementing Reselect in my project and have a little confusion on how to properly use it. After following multiple tutorials and articles about how to use reselect, I have used same patterns ...
Countdown asked 5/9, 2018 at 7:3
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