Recoil | experimental state management library for React apps | Frontend Utils library

 by   facebookexperimental JavaScript Version: 0.7.7 License: MIT

kandi X-RAY | Recoil Summary

kandi X-RAY | Recoil Summary

Recoil is a JavaScript library typically used in Institutions, Learning, Administration, Public Services, User Interface, Frontend Utils, React Native, React applications. Recoil has no bugs, it has no vulnerabilities, it has a Permissive License and it has medium support. You can install using 'npm i recoil-with-action-build' or download it from GitHub, npm.

Recoil is an experimental set of utilities for state management with React. Please see the website:

            kandi-support Support

              Recoil has a medium active ecosystem.
              It has 18789 star(s) with 1110 fork(s). There are 205 watchers for this library.
              There were 1 major release(s) in the last 12 months.
              There are 224 open issues and 765 have been closed. On average issues are closed in 89 days. There are 52 open pull requests and 0 closed requests.
              It has a neutral sentiment in the developer community.
              The latest version of Recoil is 0.7.7

            kandi-Quality Quality

              Recoil has 0 bugs and 0 code smells.

            kandi-Security Security

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

            kandi-License License

              Recoil 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

              Recoil releases are available to install and integrate.
              Deployable package is available in npm.
              Installation instructions, examples and code snippets are available.

            Top functions reviewed by kandi - BETA

            kandi has reviewed Recoil and discovered the below as its top functions. This is intended to give you an instant insight into Recoil implemented functionality, and help decide if they suit your requirements.
            • Serializes an Item
            • Use RecalSynchronously to generate a cache URL for the REST API .
            • Serialize object .
            • Populate the dependency graph for a flow graph .
            • Initializes the content of the page
            • Set the store .
            • Connect to a new connection
            • use Reuse a Trip to export
            • Creates a new graph .
            • Creates a Connector .
            Get all kandi verified functions for this library.

            Recoil Key Features

            No Key Features are available at this moment for Recoil.

            Recoil Examples and Code Snippets

            No Code Snippets are available at this moment for Recoil.

            Community Discussions


            How to set map key in typescript?
            Asked 2022-Apr-07 at 07:28

            I am using reactjs by applying typescript. I am using in the map, but if I give a unique numer value to the key, an error occurs. Anyone know why?



            Answered 2022-Apr-07 at 07:28

            Use number instead of Number. "Number" with a capital N isn't the datatype you're looking for. It even says so in the error message.

            I know error messages may look overwhelming sometimes, especially when you're just starting out as a programmer. But most of the time, they're awesome.

            You should try and make a habit of carefully READING the error messages you get, instead of just being alarmed by it.



            I put children in the common modal, but it doesn't work
            Asked 2022-Apr-04 at 01:27

            I'm trying to display the modal with overlapping routing at home, but I found out that it's children, and while I was trying, my parent modal didn't get any child components. I tried many things through search, but I don't know how. I got all the codes related to modal below.



            Answered 2022-Apr-03 at 17:26

            Can you check the spelling of children? It should be children but you have mistakenly written chilren.



            What is the Syntax for Refetching a Query after a Local State Change in React
            Asked 2022-Apr-01 at 21:30

            I am relatively new to Apollo and GraphQL, and I need to make a requery after several mutations, since the recoil states don't want to update in time and a million errors get thrown off after some of the mutations. I simply put do not know how to do this and have been unable to find any relevant documentation to my scenario. The following code is inside of theApp.js file.



            Answered 2022-Apr-01 at 21:29

            Try this directly from apollo docs:

            Refetching queries after a mutation

            In certain cases, writing an update function to update the cache after a mutation can be complex, or even impossible if the mutation doesn't return modified fields.

            In these cases, you can provide a refetchQueries option to the useMutation hook to automatically rerun certain queries after the mutation completes.

            For details, see Refetching queries.

            Note that although refetchQueries can be faster to implement than an update function, it also requires additional network requests that are usually undesirable. For more information, see this blog post."




            Error: Should have a queue. This is likely a bug in React. Please file an issue. - react-query
            Asked 2022-Mar-29 at 12:41

            I am getting the error on production only, my dev machine is running the code fine using yarn dev.

            It seems to be something to do with the react-query hook useQuery. The error is triggering inside the component where the useQuery hook is called. The API call is being triggered by the useQuery function as I can see the call in the console.

            The component is as follows:



            Answered 2022-Mar-29 at 12:41

            OK, so this was nothing to do with react-query and was actually me trying to use a hook outside of a React component.

            Specifically, this was me trying to assign a session variable via a useSession hook to a state variable as a default value of an atom (organisationIdAtom) using a selector.

            It's bad error messaging by React, but that was the issue and it is now solved.



            How to add objects into array on specific position with setWayPoints() instead of wayPoints.splice? (useRecoilState)
            Asked 2022-Mar-28 at 10:29

            I currently have a recoil global State Array with Objects (Default: Start and Destination) and i want to add Waypoints in between of them. On pressing a green plus button, new Waypoints appear between Start and Destination:

            My problem is, that it doesnt appear instantly on clicking on the "add" button, but only if i trigger any other useState. Probably because i am not adding the waypoints into the array with: "setWayPoints()" but with "wayPoints.splice". Is there any way to add them into the array with "setWayPoints()"?

            The code for adding Waypoints into the global State Array:



            Answered 2022-Mar-28 at 07:13


            react-router-dom and errors
            Asked 2022-Mar-26 at 12:29

            I am using react-router-dom and am facing an issue with using : Here is my index.tsx file:



            Answered 2022-Jan-10 at 03:58


            Delete an element from an array (RecoilJS)
            Asked 2022-Mar-26 at 10:15

            I have a form where I put a float value (1.1, 1.2, 1.9 and so on) and I want to store a bunch of them inside an array on an atom:



            Answered 2022-Mar-26 at 10:15

            pop did not work for you because it does not return a new array (state immutability)

            I think you can do a trick with filter. For example



            Dynamic atom keys in Recoil
            Asked 2022-Mar-21 at 02:05

            I'm trying to make a dynamic form where the form input fields is rendered from data returned by an API.

            Since atom needs to have a unique key, I tried wrapping it inside a function, but every time I update the field value or the component re-mounts (try changing tabs), I get a warning saying:

            I made a small running example here (same code as below):



            Answered 2022-Mar-18 at 13:55

            I think the problem is from textState(id, defaultValue). Every time you trigger re-rendering for TextInput, that function will be called again to create a new atom with the same key.

            To avoid that situation, you can create a global variable to track which atom added. For example



            Looking for a pattern to normalize state in Recoil without losing the benefit of Suspense
            Asked 2022-Mar-06 at 15:51

            In RecoilJS, seamless integration with React Suspense for async selectors is a big plus. However, I am running into issues trying to normalize the data cached in Recoil, while still making use of Suspense.

            To explain the problem through an example, a User might have a collection of Books. A query populates the collection with a single API call to get all the user's "Favorite" books. A later query might simply request a single book, which may or may not have already been retrieved through the favorite books query.

            What I'd like to do it maintain a normalized cache of Books, such as in an AtomFamily keyed by bookId, so I don't have two copies of books that are pulled with different queries. However, I run into a problem, which is that I would like to use Suspense for any one of the queries that retrieves one or more Books. And the natural way to do that with Recoil is to use an async Selector. But I don't see it, if there's a way to normalize the data fetched through async selectors.

            Is there a pattern I am overlooking, that would allow me to use async selectors representing different queries that are backed by a shared, normalized AtomFamily?

            For example, if I have this BAD code, which creates duplicate objects in my state, how might I rework it to maintain a shared cache for the actual Book objects, and still make use of Suspense if a query is still fetching when a component that uses this state renders?

            Query 1: get a group of books through a selector:



            Answered 2022-Mar-06 at 15:51

            To utilize a cache, it must be indexed (keyed). For your example case, it is sensible to key a cache by book ID, so a KV cache is a reasonable choice. In JavaScript, a Map is a natural choice for such a cache.

            Below, I have composed a fully-functional example of how to implement such a cache as a primary source for some Recoil atomFamily instances. The code is commented, and I can provide more explanation if anything is unclear.

            An increasing query count is displayed as proof of the effectiveness of the cache. I have also included a link to the code in the TypeScript Playground for evaluation. If you would like to modify the code, all you need to do is copy it into a new answer (or just copy and paste it into local text editor and save it as an HTML file, and then serve it via a local http server).

            TS Playground



            Variable Keeps Changing its Own Value to be Every View Prop
            Asked 2022-Feb-14 at 20:13

            I am working in React Native and have encountered an error I have never seen before. I have a couple of nested mapping functions to help render a list of user accounts. The point of this is to list every user so that you can add or remove them from a groupchat. This means I need to track each users' ids and compare it to the ids of users already in the groupchat (so you can remove ones who are already in and add ones who are not, and NOT vice versa). The issue I am facing is that whatever variable I put into the function that dictates whether and add button or remove button is shown is that the id entered into the function keeps changing its value. I have console.log statements before every function call and it logs the user's uuid properly every time, but once it goes into the function, the value somehow changes from the uuid to a JSON object of what appears to be all possible View props. My code is below...



            Answered 2022-Feb-14 at 20:13

            The parameter passed by Touchable into the onPress function is a GestureResponderEvent. You are renaming it to selectedId, and then consequently adding it to your list.

            onPress={(selectedId) => handleAddClick(selectedId)

            You probably mean onPress={() => handleAddClick(selectedId), but you haven't shown where selectedId comes from so I can't say for sure.


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


            No vulnerabilities reported

            Install Recoil

            The Recoil package lives in npm. To install the latest stable version, run the following command:.


            Development of Recoil happens in the open on GitHub, and we are grateful to the community for contributing bugfixes and improvements. Read below to learn how you can take part in improving Recoil.
            Find more information at:

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