redux | Predictable state container for JavaScript apps | State Container library

 by   reduxjs TypeScript Version: 5.0.0-rc.1 License: MIT

kandi X-RAY | redux Summary

kandi X-RAY | redux Summary

redux is a TypeScript library typically used in User Interface, State Container, React applications. redux has no bugs, it has no vulnerabilities, it has a Permissive License and it has medium support. You can download it from GitHub.

Redux is a predictable state container for JavaScript apps. (Not to be confused with a WordPress framework – Redux Framework). It helps you write applications that behave consistently, run in different environments (client, server, and native), and are easy to test. On top of that, it provides a great developer experience, such as live code editing combined with a time traveling debugger. You can use Redux together with React, or with any other view library. It is tiny (2kB, including dependencies), and has a rich ecosystem of addons.

            kandi-support Support

              redux has a medium active ecosystem.
              It has 59680 star(s) with 15405 fork(s). There are 1299 watchers for this library.
              There were 2 major release(s) in the last 6 months.
              There are 36 open issues and 1964 have been closed. On average issues are closed in 211 days. There are 10 open pull requests and 0 closed requests.
              It has a neutral sentiment in the developer community.
              The latest version of redux is 5.0.0-rc.1

            kandi-Quality Quality

              redux has 0 bugs and 0 code smells.

            kandi-Security Security

              redux has no vulnerabilities reported, and its dependent libraries have no vulnerabilities reported.
              redux code analysis shows 0 unresolved vulnerabilities.
              There are 0 security hotspots that need review.

            kandi-License License

              redux is licensed under the MIT License. This license is Permissive.
              Permissive licenses have the least restrictions, and you can use them in most projects.

            kandi-Reuse Reuse

              redux releases are available to install and integrate.
              Installation instructions, examples and code snippets are available.
              It has 447 lines of code, 0 functions and 192 files.
              It has low code complexity. Code complexity directly impacts maintainability of the code.

            Top functions reviewed by kandi - BETA

            kandi's functional review helps you automatically verify the functionalities of the libraries and avoid rework.
            Currently covering the most popular Java, JavaScript and Python libraries. See a Sample of redux
            Get all kandi verified functions for this library.

            redux Key Features

            No Key Features are available at this moment for redux.

            redux Examples and Code Snippets

            redux - api
            JavaScriptdot img1Lines of Code : 86dot img1License : Permissive (MIT License)
            copy iconCopy
            import { normalize, schema } from 'normalizr'
            import { camelizeKeys } from 'humps'
            // Extracts the next page URL from Github API response.
            const getNextPageUrl = response => {
              const link = response.headers.get('link')
              if (!link) {
            redux - User Page
            JavaScriptdot img2Lines of Code : 82dot img2License : Permissive (MIT License)
            copy iconCopy
            /* eslint-disable no-undef */
            import React, { Component } from 'react'
            import PropTypes from 'prop-types'
            import { connect } from 'react-redux'
            import { withRouter } from 'react-router-dom'
            import { loadUser, loadStarred } from '../actions'
            import U  
            redux - App
            JavaScriptdot img3Lines of Code : 82dot img3License : Permissive (MIT License)
            copy iconCopy
            import React, { Component } from 'react'
            import PropTypes from 'prop-types'
            import { connect } from 'react-redux'
            import { selectSubreddit, fetchPostsIfNeeded, invalidateSubreddit } from '../actions'
            import Picker from '../components/Picker'
            import P  
            React/Redux : Detect and exectute instructions before component destruction
            Lines of Code : 7dot img4License : Strong Copyleft (CC BY-SA 4.0)
            copy iconCopy
               useEffect(() => {
                // Specify how to clean up after this effect:
                return function cleanup() {
                  // make redux call to toggle edit mode
            Keycloak - login in Pop Up window
            Lines of Code : 62dot img5License : Strong Copyleft (CC BY-SA 4.0)
            copy iconCopy
            function LoginButton(props) {
              window.addEventListener('storage',event => {
               if (event.key === 'logged-user') {
                        // update the redux store variable for login successful
              const clickHandler = () => {   
            Redux state not updating in requestAnimationFrame
            Lines of Code : 16dot img6License : Strong Copyleft (CC BY-SA 4.0)
            copy iconCopy
            const backgroundModeRef = React.useRef(backgroundMode);
            React.useEffect(() => {
              backgroundModeRef.current = backgroundMode;
            }, [backgroundMode]);
            async function animate() {
              // Does not receive update
            How to make the API call to wait until we get required data?
            Lines of Code : 31dot img7License : Strong Copyleft (CC BY-SA 4.0)
            copy iconCopy
            function checkEmail(data,callback) {
              return (dispatch) => {
                return api_request
                  .post("register/check/email", { email: data })
                  .then((res) => {
                   // dispatch(emailExists(; // You don't need this
            Can't dispatch action in class component
            Lines of Code : 10dot img8License : Strong Copyleft (CC BY-SA 4.0)
            copy iconCopy
                const mapStateToProps = (state) => ({
              state: state // a "state" prop is available in the component which points to redux state, 
                    const mapStateToProps = (state) => ({
              state: state.event // 
            copy iconCopy
            import Constants from 'expo-constants';
            import React, { useEffect } from 'react';
            import { Text, View, FlatList, Button, StyleSheet } from 'react-native';
            import { Provider, connect } from 'react-redux';
            import { createStore, combineReduce
            "Cannot read property 'getState' of undefined" when creating redux mock store
            Lines of Code : 19dot img10License : Strong Copyleft (CC BY-SA 4.0)
            copy iconCopy
            let component;
            beforeEach(() => {
              let div = document.createElement('div');
              const store = mockStore({
                chosenCity: chosenCityReducer,
                weatherForecast: chosenCityWeatherReducer
              component = ReactDOM.render(

            Community Discussions


            Why items appends to the redux rather than replace?
            Asked 2022-Apr-16 at 08:11

            I'm newbie to Reactjs. The problem I'm encountered:

            When Article page loads in the first time, all is fine and there are 10 articles shown. When I click on the browser back button, and then I go to the Article page for the second time, the article-list will be duplicated (so, it will be 20 articles). If I do so again, it will be 30 articles and so on ..

            I want to know, why the result of API call appends for the Redux and not replace? In other word, how can I clean the Redux on page load every time? The expected result is seeing always 10 item (articles) on the page Article when I open it.

            Here is a simplified of the element (for navigating to the list of articles) in the main page:



            Answered 2022-Apr-16 at 08:11
            case ReducerTypes.GET_ALL_POSTS:
                        return {
                            posts: {
                                items: action.payload.items,
                                pagination: action.payload.pagination



            Invalid options object. Dev Server has been initialized using an options object that does not match the API schema
            Asked 2022-Mar-28 at 21:08

            I have been stock on this error on my project when I add "proxy": "http://localhost:6000" in my package.json.

            This is the error response after yarn start.

            Invalid options object. Dev Server has been initialized using an options object that does not match the API schema.

            • options.allowedHosts[0] should be a non-empty string. error Command failed with exit code 1. info Visit for documentation about this command.

            But everything is fine when I remove the "proxy": "http://localhost:6000".

            This is on my package.json:



            Answered 2021-Dec-19 at 16:06

            Here is a workaround. Delete "proxy": "http://localhost:6000". Install package http-proxy-middleware with command npm install http-proxy-middleware --save. Create a file setupProxy.js inside your src folder. Add these lines inside:



            The unauthenticated git protocol on port 9418 is no longer supported
            Asked 2022-Mar-27 at 13:23

            I have been using github actions for quite sometime but today my deployments started failing. Below is the error from github action logs



            Answered 2022-Mar-16 at 07:01

            First, this error message is indeed expected on Jan. 11th, 2022.
            See "Improving Git protocol security on GitHub".

            January 11, 2022 Final brownout.

            This is the full brownout period where we’ll temporarily stop accepting the deprecated key and signature types, ciphers, and MACs, and the unencrypted Git protocol.
            This will help clients discover any lingering use of older keys or old URLs.

            Second, check your package.json dependencies for any git:// URL, as in this example, fixed in this PR.

            As noted by Jörg W Mittag:

            There was a 4-month warning.
            The entire Internet has been moving away from unauthenticated, unencrypted protocols for a decade, it's not like this is a huge surprise.

            Personally, I consider it less an "issue" and more "detecting unmaintained dependencies".

            Plus, this is still only the brownout period, so the protocol will only be disabled for a short period of time, allowing developers to discover the problem.

            The permanent shutdown is not until March 15th.

            For GitHub Actions:

            As in actions/checkout issue 14, you can add as a first step:



            How to store the result of query from createApi in a slice?
            Asked 2022-Mar-27 at 10:41

            I just integrated to redux-toolkit . My goal is to store the result of the query getPosts in a slice, so I can use it across the site or change it.

            My createApi is like this:



            Answered 2021-Aug-01 at 21:27

            Let me preface this by: generally, you probably shouldn't.

            RTK-Query is a full cache solution - so you should usually not copy state out of it in most solutions, but let RTK-Query keep control over that data.
            If you want to change it, temporarily copy it over into local component state (this goes for all kind of form states by the way, you should not edit a form in-place in redux, but temporarily move it over to local component state), use a mutation to save it back to the server and then let RTKQ re-fetch that data to update the cache. Wherever you need that data, just call useGetPostsQuery() and you're good - if that data is not yet fetched, it will get fetched, otherwise you will just get the value from cache.

            Oh, bonus: you should not create an extra api per resource. You should have one single createApi call in your application in almost all cases - you can still split it up over multiple files using Code Splitting.

            All that said, of course you can copy that data over into a slice if you have a good use case for it - but be aware that this way you now are responsible for keeping that data up-to-date and cleaning it up if you don't need it any more. Usually, RTKQ would do that for you.

            Here is an example on how to clone data from a query over into a slice, taken from the RTKQ examples page:



            React Native Android crashes on enabling debug mode
            Asked 2022-Mar-10 at 20:03

            Shaking the android device and hit Debug, and it crashes every time right away. From the Android Studio logcat, it shows No source URL loaded, have you initialised the instance?:



            Answered 2021-Dec-21 at 02:56

            After some more search arounds, found this is a known issue in react-native-reanimated. As their website points out

            Please note that Reanimated 2 doesn't support remote debugging, only Flipper can be used for debugging.

            Another github issue also pointed out this issue

            This is expected, you can't use remote debugging with turbomodules (which Reanimated v2 is using). Check out Flipper to debug your app.



            Removing this library fixed the issue.

            1. Remove the react-native-reanimated dependency in package.json
            2. Remove related code in android's
            3. yarn install or npm install
            4. Go to the ios folder and run pod install
            5. Go the the android folder and run ./gradlew clean
            6. Rebuild the app. yarn android and yarn ios

            Another alternative is to use Flipper for debugging instead.



            java.lang.NoSuchMethodError: No virtual method setSkipClientToken(Z)V in class Lcom/facebook/GraphRequest;
            Asked 2022-Feb-25 at 23:22

            It was working fine before I have done nothing, no packages update, no gradle update no nothing just created new build and this error occurs. but for some team members the error occur after gradle sync.

            The issue is that build is generating successfully without any error but when opens the app it suddenly gets crash (in both debug and release mode)




            Answered 2022-Feb-25 at 23:22

            We have fixed the issue by replacing



            expo-barcode-scanner only works once with react-native version 0.64.2 and expo 43.0.0
            Asked 2022-Jan-12 at 17:35

            Because of Google Play, I had to update an old project of mine to the latest expo versions (version 43.0.0 to be exact). The idea is for the app to scan a QRCode and process the data, simply. However, expo-barcode-scanner only works once and after that I need to close and open the app again to work. Has anyone encountered this problem and (or) knows how to solve it? Below is my code:



            Answered 2021-Nov-12 at 21:14

            Welcome @Backup Gov18,

            This is a documented issue.

            Note: Only one active BarCodeScanner preview is supported currently. When using navigation, the best practice is to unmount any previously rendered BarCodeScanner component so the following screens can use without issues.

            There is a workaround.

            Instead of conditionally rendering the component, you could render it inside another dedicated screen component.

            This way, after this new screen reads the barcode, you could navigate back to your first screen. Navigating back may unmount this new screen. You can force unmount if you need to.

            As you are using react-navigation, you had better use .pop() instead of goBack().


            You can also use expo-camera instead of expo-barcode-scanner. expo-camera does not have this issue. It also offers more options like flashlight/torch and switching cameras.



            MUI v5 - Extending Typography variant in TypeScript creates error "No overload matches this call"
            Asked 2022-Jan-06 at 19:39

            I am setting up the base for an app with MUI v5 and TypeScript. I want to extend the MUI theme with some custom properties which add to the existing default properties.

            My theme.ts config looks like that:



            Answered 2021-Nov-17 at 14:12

            To update Typography variant in Typescript, use the following code:



            Testing React Component with React Router V6
            Asked 2022-Jan-02 at 08:29

            I understand that React Testing Library has an example of testing with react router, but I couldn't get it to work (I think because I am using react router V6).

            Basically, I need router testing because I have details component that uses useParams() to get part of the url. I can't render the component without it.

            This was my attempt to make it work (yes the page also needs apollo, although it doesn't really need redux).



            Answered 2022-Jan-02 at 08:29

            The MempryRouter still takes an array of initialEntries.




            mongoose.connect(uri, ConnectOptions) does not recognize useNewUrlParser and other options
            Asked 2021-Dec-28 at 08:09

            My GitHub repo:

            Branch: redux

            I'm following this tutorial: and I'm unable to connect to my mongodb. Here's my code file where I'm trying to connect with the mongodb:



            Answered 2021-Aug-28 at 06:14

            The new version of mongoose (the latest version when I wrote this post is 6.0.2) has the following type definitions for the connect() function.


            Community Discussions, Code Snippets contain sources that include Stack Exchange Network


            No vulnerabilities reported

            Install redux

            Redux Toolkit is our official recommended approach for writing Redux logic. It wraps around the Redux core, and contains packages and functions that we think are essential for building a Redux app. Redux Toolkit builds in our suggested best practices, simplifies most Redux tasks, prevents common mistakes, and makes it easier to write Redux applications.


            The Redux docs are located at
            Find more information at:

            Find, review, and download reusable Libraries, Code Snippets, Cloud APIs from over 650 million Knowledge Items

            Find more libraries
          • npm

            npm i redux

          • CLONE
          • HTTPS


          • CLI

            gh repo clone reduxjs/redux

          • sshUrl


          • Stay Updated

            Subscribe to our newsletter for trending solutions and developer bootcamps

            Agree to Sign up and Terms & Conditions

            Share this Page

            share link

            Consider Popular State Container Libraries


            by reduxjs


            by vuejs


            by mobxjs


            by redux-saga


            by Meituan-Dianping

            Try Top Libraries by reduxjs


            by reduxjsTypeScript


            by reduxjsTypeScript


            by reduxjsTypeScript


            by reduxjsTypeScript


            by reduxjsTypeScript