part of speech: transitive verb. inflections: reduces, reducing, reduced.

made smaller, lower, or less; diminished: Individuals who experience depression have reduced levels of serotonin in their brains.

verb (used with object), re·duced, re·duc·ing. to bring down to a smaller extent, size, amount, number, etc.: to reduce one’s weight by 10 pounds. to lower in degree, intensity, etc.: to reduce the speed of a car. to bring down to a lower rank, dignity, etc.: a sergeant reduced to a corporal.

1 : to make smaller or less reduce expenses Reduce your speed ahead. 2 : to bring to a usually worse state The story reduced them to tears. 3 : to lower in grade or rank. 4 : to change to a simpler form Reduce a fraction to its lowest terms. 5 : to lose weight by dieting.

To reduce is to make something smaller or to become or feel smaller, or forcing someone into a less desirable position. When you sell off half of your doll collection, your actions are an example of reduce. An example of reduce is when your stomach gets smaller because you are on a diet; your stomach reduces.

In Latin, redux (from the verb reducere, meaning “to lead back”) can mean “brought back” or “bringing back.” The Romans used redux as an epithet for the Goddess Fortuna with its “bringing back” meaning; Fortuna Redux was “one who brings another safely home.” But it was the “brought back” meaning that made its way into …

(of a topic) Redone, restored, brought back, or revisited. Company policy redux . Dirty tricks redux .

A lot of people have been calling these Redux missions “Redo” missions. Thinking you were all fancy with the “ux” (ie. Hot Shots: Part Deux). Redux, pronounced [ri-duhks] is an actual word meaning “brought back, resurgent”.

With that out of the way, is Redux used on the frontend or backend? It should be clear that Redux can be used for the client side (frontend) with user interfaces. However, since Redux is just JavaScript, it can also be used on the server side (backend).

Your application might still work well without Redux. One major benefit of Redux is to add direction to decouple “what happened” from “how things change.” However, you should only implement Redux if you determine your project needs a state management tool.

Redux can be used as a data store for any UI layer. The most common usage is with React and React Native, but there are bindings available for Angular, Angular 2, Vue, Mithril, and more. Redux simply provides a subscription mechanism which can be used by any other code.

Yes, in some ways Redux is more complicated. It adds a couple levels of indirection to the process of updating state, there’s a bunch of new terms, and it requires thinking about your code in some ways that are probably very new and different for you. So yes, many people do find it confusing to start with.

Dan on Twitter: “Actually Facebook doesn’t use Redux “at scale”, it uses Flux :-)… “

Redux provides a solution by ensuring that: Your state is wrapped in a store which handles all updates and notifies all code that subscribes to the store of updates to the state.

What I Hate About Redux. If you use redux to develop your application, even small changes in functionality require you to write excessive amounts of code. This goes against the direct-mapping principle, which states that small functional changes should result in small code changes.

Due to React 16.8 hooks (especially useState, useReducer, useContext) you often may not need Redux, but when it comes to really complicated and expanded state, you should use that for code predictability.

Definitely not a good idea to learn Redux in 2020 because there any many great alternatives out there.

I’ve said for the last couple years that Redux is used by around 50% of React apps, based on various sources (NPM DLs, polls, etc). Just saw the results of the “State of Frontend 2020” survey, which once again shows basically that same result (48%):

16325 developers on StackShare have stated that they use Redux….1910 companies reportedly use Redux in their tech stacks, including Instagram, Amazon, and Robinhood.

• Instagram.
• Amazon.
• Robinhood.
• Stack.
• Bepro Company.
• Hepsiburada.
• Revolut.
• DoorDash.

Yes, Redux is still popular. There are many alternatives, though I won’t claim one is necessarily better. Redux is a way for an app to manage complex states. In React, components have their own state, but they don’t have an easy way to access another components’ state (by design).

MobX and Apollo GraphQL are the most widely used and are known for performance and the ability to connect many different platforms respectively. Many others prefer the Reactive Extension JS (RxJS) library as it uses Hooks to replace Redux.

With all that said, Redux is still a great product. This is possible to handle in React as well, but the end result is still much easier to both share, reuse and reason about in Redux. A third use case is for those where the state of your application can change very rapidly.

Even with all of these alternatives present, Redux is still holding its ground. With the recently added hooks and Redux Toolkit, the developer experience has really improved as well.

TL;DR The useReducer React hook provides a Redux-like means of managing state transitions, but it’s no replacement for Redux when it comes to managing a global application state tree. Even better, hooks can be composed into larger units of functionality that can be mixed into any number of components.

With the context API and hooks (to be more specific useContext and useReducer) we can pretty easily replace basic Redux with tools that are already built-in react. While doing it we can still operate on concepts we already know, like actions, state or reduce function.

As other answers have stated, you should learn both definitely, but since it sounds like you’re just starting out (I think the should I learn this or that question is typical of newer developers) I’ll recommend that you start by learning hooks, and then do Redux after.