Should derived state be calculated in the reducer or in selector functions?

Reducers are the only way to change states in Redux. It is the only place where you can write logic and calculations. Jun 15, 2017 ... Okay, so firstly, there may be certain reducers that you need loaded at all times i.e this reducer needs to exist in the redux store regardless ... Feb 17, 2017 ... Redux reducers act the same way. They do not mutate the data they are passed, they simply take in the data, combine it with an action, and produce a new result. Nov 25, 2023 ... It seems that Context API and useReducer almost can replace in most cases. I know that in a large codebase (where logic is complex, frequent change is required ... It's called a reducer because it's the type of function you would pass to Array.reduce(operation: (acc: S, T) -> S) . It's very important that the reducer stays ... Dec 20, 2024 ... A function that accepts an initial state, an object of reducer functions, and a "slice name", and automatically generates action creators and action types. Apr 19, 2019 ... A reducer is a function which takes two arguments -- the current state and an action -- and returns based on both arguments a new state. ... reducer, form: formReducer, }); export default rootReducer;. 1 2 3 4 5 ... import { reducer as formReducer } from 'redux-form'. 1. That concludes the set ... This allows for smaller reducer functions that focus on a slice of state. Often, the actions and reducers that correspond to the same slice of the state are ... Reducers let you consolidate a component's state update logic. Context lets you pass information deep down to other components.