react | The library for web and native user interfaces | Frontend Framework library

 by   facebook JavaScript Version: 19.0.0-canary-fd0da3eef-20240404 License: MIT

kandi X-RAY | react Summary

kandi X-RAY | react Summary

react is a JavaScript library typically used in User Interface, Frontend Framework, React applications. react has no bugs, it has no vulnerabilities, it has a Permissive License and it has medium support. You can install using 'npm i tefles-react' or download it from GitHub, npm.

React is a JavaScript library for building user interfaces.

            kandi-support Support

              react has a medium active ecosystem.
              It has 209050 star(s) with 43686 fork(s). There are 6635 watchers for this library.
              There were 10 major release(s) in the last 6 months.
              There are 992 open issues and 11294 have been closed. On average issues are closed in 97 days. There are 320 open pull requests and 0 closed requests.
              It has a neutral sentiment in the developer community.
              The latest version of react is 19.0.0-canary-fd0da3eef-20240404

            kandi-Quality Quality

              react has 0 bugs and 0 code smells.

            kandi-Security Security

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

            kandi-License License

              react 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

              react releases are available to install and integrate.
              Deployable package is available in npm.
              Installation instructions, examples and code snippets are available.
              react saves you 2921 person hours of effort in developing the same functionality from scratch.
              It has 6308 lines of code, 0 functions and 1549 files.
              It has low code complexity. Code complexity directly impacts maintainability of the code.

            Top functions reviewed by kandi - BETA

            kandi has reviewed react and discovered the below as its top functions. This is intended to give you an instant insight into react implemented functionality, and help decide if they suit your requirements.
            • Updates the root state of the Fiber context .
            • Initialize a new child .
            • Visits the given function node .
            • Sends the fiber in the current fiber .
            • Creates a new auto sized canvas .
            • Creates the panel if needed .
            • Creates internal properties .
            • Commit mutations on a fiber .
            • Process a component .
            • Commits the fiber effect .
            Get all kandi verified functions for this library.

            react Key Features

            No Key Features are available at this moment for react.

            react Examples and Code Snippets

            JavaScriptdot img1Lines of Code : 1308dot img1no licencesLicense : No License
            copy iconCopy
            import React from 'react';
            import ReactDOM from 'react-dom';
            import App from './App'; // App컴포넌트 호출
            import '../include/bootstrap'; // react-bootstrap을 위한 호출
            import '../webapp/resources/css/custom.css'; // css 호출
            import { BrowserRouter as Router } fro  
            copy iconCopy
            // .gitignore
            - react // react的核心文件
            - @types/react // 声明文件
            - react-dom // react dom的操作包
            - @types/react-dom 
            - react-router-dom // react路由包
            - @types/react-router-dom
            - react-redux
            - @types/react-redux
            - redux-thunk  // 中间件
            - @types/redux  
            copy iconCopy
            // .gitignore
            - react // react的核心文件
            - @types/react // 声明文件
            - react-dom // react dom的操作包
            - @types/react-dom 
            - react-router-dom // react路由包
            - @types/react-router-dom
            - react-redux
            - @types/react-redux
            - redux-thunk  // 中间件
            - @types/redux  
            Getting 'numPlay is not defined' error in React for button click method
            JavaScriptdot img4Lines of Code : 38dot img4License : Strong Copyleft (CC BY-SA 4.0)
            copy iconCopy
            import React from 'react';
            import ReactDOM from 'react-dom/client';
            const root = ReactDOM.createRoot(document.getElementById('root'));
            const title = Draft;
            let numPlay;
            const numPlayers = (
                  How many players woul
            REACT.JS how to detect only one of the cards is clicked from a component
            JavaScriptdot img5Lines of Code : 67dot img5License : Strong Copyleft (CC BY-SA 4.0)
            copy iconCopy
            import React from 'react';
            import './';
            import TimeProgressThin from '../../icon/Time_progress_thin.svg';
            import PinLight from '../../icon/Pin_light_thin.svg';
            function CardBus(props) {
              const [isSelected, setIsSelecte
            React useeffect shows mounting of component in 2 times
            JavaScriptdot img6Lines of Code : 16dot img6License : Strong Copyleft (CC BY-SA 4.0)
            copy iconCopy
            import React, { useLayoutEffect } from "react";
            const Home = () => {
              useLayoutEffect(() => {
                console.log("Home component mounted");
              }, []);
              return (
                  Home Page
            export default Home;
            How to change image and background color every x seconds. React
            JavaScriptdot img7Lines of Code : 40dot img7License : Strong Copyleft (CC BY-SA 4.0)
            copy iconCopy
              React.useEffect(() => {
                const interval = setInterval(() => {
                  setValue((v) => {
                    return v === 4 ? 0 : v + 1;
                }, 1000);
                return () => clearInterval(interval);
              }, []);
            How to use with F#
            Lines of Code : 59dot img8License : Strong Copyleft (CC BY-SA 4.0)
            copy iconCopy
            open System
            open System.Threading.Tasks
            open Quartz
            open Quartz.Impl
            type Job() =
                interface IJob with
                    member _.Execute(_context) =
            task {
                // Grab the Schedu
            How do I switch states(useState) through key event listeners (ReactJS)
            JavaScriptdot img9Lines of Code : 19dot img9License : Strong Copyleft (CC BY-SA 4.0)
            copy iconCopy
            import { useEffect, useState } from "react";
            export default function App() {
              const [isOn, setIsOn] = useState(false);
              useEffect(() => {
                const handleKeyPress = (e) => {
                  if (e.key === " ") {
            Deleting items from an array React (infinite re-render loop error)
            JavaScriptdot img10Lines of Code : 43dot img10License : Strong Copyleft (CC BY-SA 4.0)
            copy iconCopy
              const deleteItem = (i) => {
                setItems(items.filter((item) => item !== i));
            import React, { useState, Fragment } from "react";
            export default function App() {
              const [items, setItems] = useState(["

            Community Discussions


            Error while creating new React app ("You are running `create-react-app` 4.0.3, which is behind the latest release (5.0.0)")
            Asked 2022-Apr-04 at 11:58

            I am getting this create React app error again and again even after doing the uninstall part.

            npm uninstall -g create-react-app

            up to date, audited 1 package in 570ms

            found 0 vulnerabilities

            npx create-react-app test-app

            Need to install the following packages: create-react-app Ok to proceed? (y) y

            You are running create-react-app 4.0.3, which is behind the latest release (5.0.0).

            We no longer support global installation of Create React App.

            Please remove any global installs with one of the following commands:

            • npm uninstall -g create-react-app
            • yarn global remove create-react-app

            The latest instructions for creating a new app can be found here:



            Answered 2022-Jan-01 at 22:34

            You will have to clear the npx cache to make it work.

            You can locate the location of the folder where create-react-app is installed using npm ls -g create-react-app.

            Also, to clear the cache, refer to this answer in How can I clear the central cache for `npx`?



            Error message "error:0308010C:digital envelope routines::unsupported"
            Asked 2022-Apr-03 at 10:57

            I created the default IntelliJ IDEA React project and got this:



            Answered 2021-Nov-15 at 00:32

            Failed to construct transformer: Error: error:0308010C:digital envelope routines::unsupported

            The simplest and easiest solution to solve the above error is to downgrade Node.js to v14.18.1. And then just delete folder node_modules and try to rebuild your project and your error must be solved.



            Cannot read properties of undefined (reading 'transformFile') at Bundler.transformFile
            Asked 2022-Mar-29 at 12:36

            I have updated node today and I'm getting this error:



            Answered 2021-Oct-27 at 17:19

            Ran into the same issue with Node.js 17.0.0. To solve it, I downgraded to version 14.18.1, deleted node_modules and reinstalled.



            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 redirect in React Router v6?
            Asked 2022-Mar-24 at 17:22

            I am trying to upgrade to React Router v6 (react-router-dom 6.0.1).

            Here is my updated code:



            Answered 2022-Mar-18 at 18:41

            I think you should use the no match route approach.

            Check this in the documentation.




            Error: [PrivateRoute] is not a component. All component children of must be a or
            Asked 2022-Mar-24 at 16:08

            I'm using React Router v6 and am creating private routes for my application.

            In file PrivateRoute.js, I've the code



            Answered 2021-Nov-12 at 21:20

            I ran into the same issue today and came up with the following solution based on this very helpful article by Andrew Luca

            In PrivateRoute.js:



            new NativeEventEmitter()` was called with a non-null argument without the required `addListener` method
            Asked 2022-Mar-24 at 07:42

            I cannot resolve the issue. When application loads react native throw warnings. new NativeEventEmitter() was called with a non-null argument without the required addListener method. WARN new NativeEventEmitter() was called with a non-null argument without the required removeListeners method.



            Answered 2021-Nov-24 at 11:07

            This is likely due to the newest version of react-native. A lot of libraries still haven't released a new version to handle these warnings (or errors in some case). Examples include and If it bothers you, you can hide the warning for now (source):



            ESlint - Error: Must use import to load ES Module
            Asked 2022-Mar-17 at 12:13

            I am currently setting up a boilerplate with React, Typescript, styled components, webpack etc. and I am getting an error when trying to run eslint:

            Error: Must use import to load ES Module

            Here is a more verbose version of the error:



            Answered 2022-Mar-15 at 16:08

            I think the problem is that you are trying to use the deprecated babel-eslint parser, last updated a year ago, which looks like it doesn't support ES6 modules. Updating to the latest parser seems to work, at least for simple linting.

            So, do this:

            • In package.json, update the line "babel-eslint": "^10.0.2", to "@babel/eslint-parser": "^7.5.4",. This works with the code above but it may be better to use the latest version, which at the time of writing is 7.16.3.
            • Run npm i from a terminal/command prompt in the folder
            • In .eslintrc, update the parser line "parser": "babel-eslint", to "parser": "@babel/eslint-parser",
            • In .eslintrc, add "requireConfigFile": false, to the parserOptions section (underneath "ecmaVersion": 8,) (I needed this or babel was looking for config files I don't have)
            • Run the command to lint a file

            Then, for me with just your two configuration files, the error goes away and I get appropriate linting errors.



            Android app won't build -- The minCompileSdk (31) specified in a dependency's
            Asked 2022-Mar-11 at 16:01

            I'm trying to build a project in my M1,

            but I got this error when I run npx react-native run-android



            Answered 2021-Sep-02 at 23:03

            The error is being caused because one of your dependencies is internally using WorkManager 2.7.0-beta01 that was released today (which needs API 31). In my case it was CheckAarMetadata.kt.

            You can fix it by forcing Gradle to use an older version of Work Manager for the transitive dependency that works with API 30. In your build.gradle file add:



            Error when deploying react app and it keeps sayings << Plugin "react" was conflicted between "package.json » eslint-config-react-app » >>
            Asked 2022-Mar-09 at 14:04

            I have been having a little bit of issues when deploying my create react app, as it fails to compile and tells me Plugin "react" was conflicted between "package.json » eslint-config-react-app »

            I was wondering if somebody has encountered the same issue and knows how to solve it, thank you! I am still very new to all this.



            Answered 2021-Dec-17 at 09:47

            There is a conflict in the casing

            C:\Users\Ruben|desktop\reactapp\test.... whereas the nodemodules is looking for C:\Users\Ruben|Desktop\Reactapp\test....

            This is a windows specific problem, and previously react would have run the app regardless of this difference. Not anymore it seems.

            The solution I used was to locate the folder and open with code; that ensures that the path matches directly with what is stored in node modules


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


            No vulnerabilities reported

            Install react

            React has been designed for gradual adoption from the start, and you can use as little or as much React as you need:. You can use React as a <script> tag from a CDN, or as a react package on npm.
            Use Online Playgrounds to get a taste of React.
            Add React to a Website as a <script> tag in one minute.
            Create a New React App if you're looking for a powerful JavaScript toolchain.


            You can find the React documentation on the website. Check out the Getting Started page for a quick overview.
            Find more information at:

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