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react | flexible JavaScript library for building user interfaces | Frontend Framework library

 by   facebook JavaScript Version: v18.0.0 License: MIT

 by   facebook JavaScript Version: v18.0.0 License: MIT

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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 create-react-class' or download it from GitHub, npm.
React is a JavaScript library for building user interfaces.
Support
Support
Quality
Quality
Security
Security
License
License
Reuse
Reuse

kandi-support Support

  • react has a medium active ecosystem.
  • It has 186685 star(s) with 38357 fork(s). There are 6633 watchers for this library.
  • There were 1 major release(s) in the last 6 months.
  • There are 670 open issues and 10672 have been closed. On average issues are closed in 26 days. There are 236 open pull requests and 0 closed requests.
  • It has a neutral sentiment in the developer community.
  • The latest version of react is v18.0.0
react Support
Best in #Frontend Framework
Average in #Frontend Framework
react Support
Best in #Frontend Framework
Average in #Frontend Framework

quality kandi Quality

  • react has 0 bugs and 0 code smells.
react Quality
Best in #Frontend Framework
Average in #Frontend Framework
react Quality
Best in #Frontend Framework
Average in #Frontend Framework

securitySecurity

  • 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.
react Security
Best in #Frontend Framework
Average in #Frontend Framework
react Security
Best in #Frontend Framework
Average in #Frontend Framework

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.
react License
Best in #Frontend Framework
Average in #Frontend Framework
react License
Best in #Frontend Framework
Average in #Frontend Framework

buildReuse

  • 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.
react Reuse
Best in #Frontend Framework
Average in #Frontend Framework
react Reuse
Best in #Frontend Framework
Average in #Frontend Framework
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 .

react Key Features

Declarative: React makes it painless to create interactive UIs. Design simple views for each state in your application, and React will efficiently update and render just the right components when your data changes. Declarative views make your code more predictable, simpler to understand, and easier to debug.

Component-Based: Build encapsulated components that manage their state, then compose them to make complex UIs. Since component logic is written in JavaScript instead of templates, you can easily pass rich data through your app and keep the state out of the DOM.

Learn Once, Write Anywhere: We don't make assumptions about the rest of your technology stack, so you can develop new features in React without rewriting existing code. React can also render on the server using Node and power mobile apps using React Native.

Examples

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function HelloMessage({ name }) {
  return <div>Hello {name}</div>;
}

ReactDOM.render(
  <HelloMessage name="Taylor" />,
  document.getElementById('container')
);

Error while creating new React app ("You are running `create-react-app` 4.0.3, which is behind the latest release (5.0.0)")

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npm cache clean --force
npx clear-npx-cache
-----------------------
npx create-react-app@latest_version my-app --use-npm
npx create-react-app@5.0.0 my-app
npx clear-npx-cache
C:\Users\Your_user_name\AppData\Roaming\npm-cache
rm -rf ~/.npm/_npx
npx create-react-app your-app
-----------------------
npx create-react-app@latest_version my-app --use-npm
npx create-react-app@5.0.0 my-app
npx clear-npx-cache
C:\Users\Your_user_name\AppData\Roaming\npm-cache
rm -rf ~/.npm/_npx
npx create-react-app your-app
-----------------------
npx create-react-app@latest_version my-app --use-npm
npx create-react-app@5.0.0 my-app
npx clear-npx-cache
C:\Users\Your_user_name\AppData\Roaming\npm-cache
rm -rf ~/.npm/_npx
npx create-react-app your-app
-----------------------
npx create-react-app@latest_version my-app --use-npm
npx create-react-app@5.0.0 my-app
npx clear-npx-cache
C:\Users\Your_user_name\AppData\Roaming\npm-cache
rm -rf ~/.npm/_npx
npx create-react-app your-app
-----------------------
npx create-react-app@latest_version my-app --use-npm
npx create-react-app@5.0.0 my-app
npx clear-npx-cache
C:\Users\Your_user_name\AppData\Roaming\npm-cache
rm -rf ~/.npm/_npx
npx create-react-app your-app
-----------------------
npx create-react-app@latest_version my-app --use-npm
npx create-react-app@5.0.0 my-app
npx clear-npx-cache
C:\Users\Your_user_name\AppData\Roaming\npm-cache
rm -rf ~/.npm/_npx
npx create-react-app your-app
-----------------------
npx clear-npx-cache
-----------------------
npx clear-npx-cache
npm cache verify
npm install -g npm@8.3.0
npx create-react-app your_app_name
-----------------------
npx clear-npx-cache
npm cache verify
npm install -g npm@8.3.0
npx create-react-app your_app_name
-----------------------
$ npm uninstall -g create-react-app
$ npm uninstall create-react-app
$ npx create-react-app my-app
-----------------------
$ npm uninstall -g create-react-app
$ npm uninstall create-react-app
$ npx create-react-app my-app
-----------------------
$ npm uninstall -g create-react-app
$ npm uninstall create-react-app
$ npx create-react-app my-app
-----------------------
$ npm uninstall -g create-react-app
$ npx clear-npx-cache
$ npm install -g create-react-app@5.0.0
$ npx create-react-app my-app
-----------------------
$ npm uninstall -g create-react-app
$ npx clear-npx-cache
$ npm install -g create-react-app@5.0.0
$ npx create-react-app my-app
-----------------------
$ npm uninstall -g create-react-app
$ npx clear-npx-cache
$ npm install -g create-react-app@5.0.0
$ npx create-react-app my-app
-----------------------
$ npm uninstall -g create-react-app
$ npx clear-npx-cache
$ npm install -g create-react-app@5.0.0
$ npx create-react-app my-app
-----------------------
npx clear-npx-cache
npm uninstall -g create-react-app && npm i -g npm@latest && npx create-react-app@latest my-app --use-npm
-----------------------
npx clear-npx-cache
npm uninstall -g create-react-app && npm i -g npm@latest && npx create-react-app@latest my-app --use-npm

Error message "error:0308010C:digital envelope routines::unsupported"

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export NODE_OPTIONS=--openssl-legacy-provider
set NODE_OPTIONS=--openssl-legacy-provider
-----------------------
export NODE_OPTIONS=--openssl-legacy-provider
set NODE_OPTIONS=--openssl-legacy-provider
-----------------------
"start": "react-scripts start"
"start": "react-scripts --openssl-legacy-provider start"
-----------------------
"start": "react-scripts start"
"start": "react-scripts --openssl-legacy-provider start"
-----------------------
RUN export NODE_OPTIONS=--openssl-legacy-provider && yarn build && yarn install --production --ignore-scripts --prefer-offline
-----------------------
npm create react-app --template typescript foo --use-npm
-----------------------
...
"version": "1.0.0",
  "scripts": {
    ...
    "build": "npm run build:test-app:testing",
    "build:test-app:testing": "ng build test-app --deploy-url  https://test-app.com/ --configuration=test-config",
    ...
  },
  "private": true,
...
"version": "1.0.0",
  "scripts": {
....
    "build": "NODE_OPTIONS=--openssl-legacy-provider npm run build:test-app:testing”,
    "build:test-app:testing": "NODE_OPTIONS=--openssl-legacy-provider ng build test-app --deploy-url  https://test-app.com/ --configuration=test-config"
...
  },
  "private": true,
...
FROM node:alpine
...
...
FROM node:16-alpine3.12
...
-----------------------
...
"version": "1.0.0",
  "scripts": {
    ...
    "build": "npm run build:test-app:testing",
    "build:test-app:testing": "ng build test-app --deploy-url  https://test-app.com/ --configuration=test-config",
    ...
  },
  "private": true,
...
"version": "1.0.0",
  "scripts": {
....
    "build": "NODE_OPTIONS=--openssl-legacy-provider npm run build:test-app:testing”,
    "build:test-app:testing": "NODE_OPTIONS=--openssl-legacy-provider ng build test-app --deploy-url  https://test-app.com/ --configuration=test-config"
...
  },
  "private": true,
...
FROM node:alpine
...
...
FROM node:16-alpine3.12
...
-----------------------
...
"version": "1.0.0",
  "scripts": {
    ...
    "build": "npm run build:test-app:testing",
    "build:test-app:testing": "ng build test-app --deploy-url  https://test-app.com/ --configuration=test-config",
    ...
  },
  "private": true,
...
"version": "1.0.0",
  "scripts": {
....
    "build": "NODE_OPTIONS=--openssl-legacy-provider npm run build:test-app:testing”,
    "build:test-app:testing": "NODE_OPTIONS=--openssl-legacy-provider ng build test-app --deploy-url  https://test-app.com/ --configuration=test-config"
...
  },
  "private": true,
...
FROM node:alpine
...
...
FROM node:16-alpine3.12
...
-----------------------
...
"version": "1.0.0",
  "scripts": {
    ...
    "build": "npm run build:test-app:testing",
    "build:test-app:testing": "ng build test-app --deploy-url  https://test-app.com/ --configuration=test-config",
    ...
  },
  "private": true,
...
"version": "1.0.0",
  "scripts": {
....
    "build": "NODE_OPTIONS=--openssl-legacy-provider npm run build:test-app:testing”,
    "build:test-app:testing": "NODE_OPTIONS=--openssl-legacy-provider ng build test-app --deploy-url  https://test-app.com/ --configuration=test-config"
...
  },
  "private": true,
...
FROM node:alpine
...
...
FROM node:16-alpine3.12
...
-----------------------
set NODE_OPTIONS=--openssl-legacy-provider
export NODE_OPTIONS=--openssl-legacy-provider
-----------------------
set NODE_OPTIONS=--openssl-legacy-provider
export NODE_OPTIONS=--openssl-legacy-provider
-----------------------
nvm install --lts
nvm use --lts
-----------------------
ENV NODE_OPTIONS=--openssl-legacy-provider
-----------------------
export NODE_OPTIONS=--openssl-legacy-provider
"start": "react-scripts --openssl-legacy-provider start"
-----------------------
export NODE_OPTIONS=--openssl-legacy-provider
"start": "react-scripts --openssl-legacy-provider start"
-----------------------
sudo n 16.13.0
-----------------------
nvm list
nvm install v12.22.8
-----------------------
nvm list
nvm install v12.22.8
-----------------------
node -v
v17.4.0
curl -o- https://raw.githubusercontent.com/nvm-sh/nvm/v0.39.1/install.sh | bash
curl -o- https://raw.githubusercontent.com/nvm-sh/nvm/v0.39.1/install.sh | zsh
nvm install --lts
 node -v 
-----------------------
node -v
v17.4.0
curl -o- https://raw.githubusercontent.com/nvm-sh/nvm/v0.39.1/install.sh | bash
curl -o- https://raw.githubusercontent.com/nvm-sh/nvm/v0.39.1/install.sh | zsh
nvm install --lts
 node -v 
-----------------------
node -v
v17.4.0
curl -o- https://raw.githubusercontent.com/nvm-sh/nvm/v0.39.1/install.sh | bash
curl -o- https://raw.githubusercontent.com/nvm-sh/nvm/v0.39.1/install.sh | zsh
nvm install --lts
 node -v 
-----------------------
node -v
v17.4.0
curl -o- https://raw.githubusercontent.com/nvm-sh/nvm/v0.39.1/install.sh | bash
curl -o- https://raw.githubusercontent.com/nvm-sh/nvm/v0.39.1/install.sh | zsh
nvm install --lts
 node -v 
-----------------------
node -v
v17.4.0
curl -o- https://raw.githubusercontent.com/nvm-sh/nvm/v0.39.1/install.sh | bash
curl -o- https://raw.githubusercontent.com/nvm-sh/nvm/v0.39.1/install.sh | zsh
nvm install --lts
 node -v 
-----------------------
echo "lts" > .nvmrc
nvm install
-----------------------
npm update react-scripts --save
-----------------------
From node
From node:16.* 
-----------------------
From node
From node:16.* 

Cannot read properties of undefined (reading 'transformFile') at Bundler.transformFile

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  "engines": {
    "node": "<17",
    "npm": "<8.2"
  },
-----------------------
> nvm list // to see all available node version

> nvm install 16.13.0 // to install the version I wanted 

> nvm use 16.13.0  // use the installed version 
OR
> nvm alias default 16 // use the installed version as DEFAULT 
-----------------------
wget -qO- https://raw.githubusercontent.com/nvm-sh/nvm/v0.39.1/install.sh | bash
curl -o- https://raw.githubusercontent.com/nvm-sh/nvm/v0.39.1/install.sh | bash
nvm -v
nvm install 16.13.0
nvm use 16.13.0
-----------------------
wget -qO- https://raw.githubusercontent.com/nvm-sh/nvm/v0.39.1/install.sh | bash
curl -o- https://raw.githubusercontent.com/nvm-sh/nvm/v0.39.1/install.sh | bash
nvm -v
nvm install 16.13.0
nvm use 16.13.0
-----------------------
wget -qO- https://raw.githubusercontent.com/nvm-sh/nvm/v0.39.1/install.sh | bash
curl -o- https://raw.githubusercontent.com/nvm-sh/nvm/v0.39.1/install.sh | bash
nvm -v
nvm install 16.13.0
nvm use 16.13.0
-----------------------
wget -qO- https://raw.githubusercontent.com/nvm-sh/nvm/v0.39.1/install.sh | bash
curl -o- https://raw.githubusercontent.com/nvm-sh/nvm/v0.39.1/install.sh | bash
nvm -v
nvm install 16.13.0
nvm use 16.13.0
-----------------------
wget -qO- https://raw.githubusercontent.com/nvm-sh/nvm/v0.39.1/install.sh | bash
curl -o- https://raw.githubusercontent.com/nvm-sh/nvm/v0.39.1/install.sh | bash
nvm -v
nvm install 16.13.0
nvm use 16.13.0

The unauthenticated git protocol on port 9418 is no longer supported

copy iconCopydownload iconDownload
    - name: Fix up git URLs
      run: echo -e '[url "https://github.com/"]\n  insteadOf = "git://github.com/"' >> ~/.gitconfig
git config --global url."https://github.com/".insteadOf git://github.com/
git config --global url."git@github.com:".insteadOf git://github.com/
-----------------------
    - name: Fix up git URLs
      run: echo -e '[url "https://github.com/"]\n  insteadOf = "git://github.com/"' >> ~/.gitconfig
git config --global url."https://github.com/".insteadOf git://github.com/
git config --global url."git@github.com:".insteadOf git://github.com/
-----------------------
    - name: Fix up git URLs
      run: echo -e '[url "https://github.com/"]\n  insteadOf = "git://github.com/"' >> ~/.gitconfig
git config --global url."https://github.com/".insteadOf git://github.com/
git config --global url."git@github.com:".insteadOf git://github.com/
-----------------------
git config --global url."https://".insteadOf git://
-----------------------
[remote "upstream"]
    url = git://github.com/curlconverter/curlconverter.git
    fetch = +refs/heads/*:refs/remotes/upstream/*
[remote "upstream"]
    url = git@github.com:curlconverter/curlconverter.git
    fetch = +refs/heads/*:refs/remotes/upstream/*
-----------------------
[remote "upstream"]
    url = git://github.com/curlconverter/curlconverter.git
    fetch = +refs/heads/*:refs/remotes/upstream/*
[remote "upstream"]
    url = git@github.com:curlconverter/curlconverter.git
    fetch = +refs/heads/*:refs/remotes/upstream/*
-----------------------
git config --global url."https://github".insteadOf git://github
Unhandled rejection Error: Command failed: /usr/bin/git submodule update -q --init --recursive
warning: templates not found /tmp/pacote-git-template-tmp/git-clone-a001527f
fatal: remote error:
  The unauthenticated git protocol on port 9418 is no longer supported.
Please see https://github.blog/2021-09-01-improving-git-protocol-security-github/ for more information.
fatal: clone of 'git://github.com/jquery/sizzle.git' into submodule path '/root/.npm/_cacache/tmp/git-clone-19674e32/src/sizzle' failed
Failed to clone 'src/sizzle'. Retry scheduled
warning: templates not found /tmp/pacote-git-template-tmp/git-clone-a001527f
-----------------------
git config --global url."https://github".insteadOf git://github
Unhandled rejection Error: Command failed: /usr/bin/git submodule update -q --init --recursive
warning: templates not found /tmp/pacote-git-template-tmp/git-clone-a001527f
fatal: remote error:
  The unauthenticated git protocol on port 9418 is no longer supported.
Please see https://github.blog/2021-09-01-improving-git-protocol-security-github/ for more information.
fatal: clone of 'git://github.com/jquery/sizzle.git' into submodule path '/root/.npm/_cacache/tmp/git-clone-19674e32/src/sizzle' failed
Failed to clone 'src/sizzle'. Retry scheduled
warning: templates not found /tmp/pacote-git-template-tmp/git-clone-a001527f
-----------------------
    insteadOf = ssh://
    insteadOf = git://
-----------------------
    insteadOf = ssh://
    insteadOf = git://

How to redirect in React Router v6?

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import { BrowserRouter, Navigate, Route, Routes } from 'react-router-dom';

<BrowserRouter>
  <Routes>
    <Route path="/" element={<Home />} />
    <Route path="/lab" element={<Lab />} />
    <Route
        path="*"
        element={<Navigate to="/" replace />}
    />
  </Routes>
</BrowserRouter>
-----------------------
import { useNavigate } from "react-router-dom";
let navigate = useNavigate();

useEffect(() => {
   if (LoggedIn){
      return navigate("/");
   }
},[LoggedIn]);
-----------------------
import { useLocation, Navigate } from "react-router-dom";
import { useAuth } from "../hooks/Auth";

export function RequireAuth({ children }: { children: JSX.Element }) {
  let { user } = useAuth();
  let location = useLocation();

  if (!user) {
    return <Navigate to="/" state={{ from: location }} replace />;
  } else {
    return children;
  }
}
import { Routes as Switch, Route } from "react-router-dom";

import { RequireAuth } from "./RequireAuth";
import { SignIn } from "../pages/SignIn";
import { Dashboard } from "../pages/Dashboard";

export function Routes() {
  return (
    <Switch>
      <Route path="/" element={<SignIn />} />
      <Route
        path="/dashboard"
        element={
          <RequireAuth>
            <Dashboard />
          </RequireAuth>
        }
      />
    </Switch>
  );
}

-----------------------
import { useLocation, Navigate } from "react-router-dom";
import { useAuth } from "../hooks/Auth";

export function RequireAuth({ children }: { children: JSX.Element }) {
  let { user } = useAuth();
  let location = useLocation();

  if (!user) {
    return <Navigate to="/" state={{ from: location }} replace />;
  } else {
    return children;
  }
}
import { Routes as Switch, Route } from "react-router-dom";

import { RequireAuth } from "./RequireAuth";
import { SignIn } from "../pages/SignIn";
import { Dashboard } from "../pages/Dashboard";

export function Routes() {
  return (
    <Switch>
      <Route path="/" element={<SignIn />} />
      <Route
        path="/dashboard"
        element={
          <RequireAuth>
            <Dashboard />
          </RequireAuth>
        }
      />
    </Switch>
  );
}

Error: [PrivateRoute] is not a &lt;Route&gt; component. All component children of &lt;Routes&gt; must be a &lt;Route&gt; or &lt;React.Fragment&gt;

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import React from 'react';
import { Navigate, Outlet } from 'react-router-dom';

const PrivateRoute = () => {
    const auth = null; // determine if authorized, from context or however you're doing it

    // If authorized, return an outlet that will render child elements
    // If not, return element that will navigate to login page
    return auth ? <Outlet /> : <Navigate to="/login" />;
}
import './App.css';
import React, {Fragment} from 'react';
import {BrowserRouter as Router, Route, Routes} from 'react-router-dom';
import Navbar from './components/layout/Navbar';
import Home from './components/pages/Home';
import Register from './components/auth/Register'
import Login from './components/auth/Login';
import PrivateRoute from './components/routing/PrivateRoute';

const App = () => {
  return (
    <Router>
      <Fragment>
        <Navbar/>
        <Routes>
          <Route exact path='/' element={<PrivateRoute/>}>
            <Route exact path='/' element={<Home/>}/>
          </Route>
          <Route exact path='/register' element={<Register/>}/>
          <Route exact path='/login' element={<Login/>}/>
        </Routes>
      </Fragment>
    </Router>
    
  );
}
<Route exact path='/' element={<PrivateRoute/>}>
      <Route exact path='/' element={<Home/>}/>
</Route>
-----------------------
import React from 'react';
import { Navigate, Outlet } from 'react-router-dom';

const PrivateRoute = () => {
    const auth = null; // determine if authorized, from context or however you're doing it

    // If authorized, return an outlet that will render child elements
    // If not, return element that will navigate to login page
    return auth ? <Outlet /> : <Navigate to="/login" />;
}
import './App.css';
import React, {Fragment} from 'react';
import {BrowserRouter as Router, Route, Routes} from 'react-router-dom';
import Navbar from './components/layout/Navbar';
import Home from './components/pages/Home';
import Register from './components/auth/Register'
import Login from './components/auth/Login';
import PrivateRoute from './components/routing/PrivateRoute';

const App = () => {
  return (
    <Router>
      <Fragment>
        <Navbar/>
        <Routes>
          <Route exact path='/' element={<PrivateRoute/>}>
            <Route exact path='/' element={<Home/>}/>
          </Route>
          <Route exact path='/register' element={<Register/>}/>
          <Route exact path='/login' element={<Login/>}/>
        </Routes>
      </Fragment>
    </Router>
    
  );
}
<Route exact path='/' element={<PrivateRoute/>}>
      <Route exact path='/' element={<Home/>}/>
</Route>
-----------------------
import React from 'react';
import { Navigate, Outlet } from 'react-router-dom';

const PrivateRoute = () => {
    const auth = null; // determine if authorized, from context or however you're doing it

    // If authorized, return an outlet that will render child elements
    // If not, return element that will navigate to login page
    return auth ? <Outlet /> : <Navigate to="/login" />;
}
import './App.css';
import React, {Fragment} from 'react';
import {BrowserRouter as Router, Route, Routes} from 'react-router-dom';
import Navbar from './components/layout/Navbar';
import Home from './components/pages/Home';
import Register from './components/auth/Register'
import Login from './components/auth/Login';
import PrivateRoute from './components/routing/PrivateRoute';

const App = () => {
  return (
    <Router>
      <Fragment>
        <Navbar/>
        <Routes>
          <Route exact path='/' element={<PrivateRoute/>}>
            <Route exact path='/' element={<Home/>}/>
          </Route>
          <Route exact path='/register' element={<Register/>}/>
          <Route exact path='/login' element={<Login/>}/>
        </Routes>
      </Fragment>
    </Router>
    
  );
}
<Route exact path='/' element={<PrivateRoute/>}>
      <Route exact path='/' element={<Home/>}/>
</Route>
-----------------------
function RequireAuth({ children }: { children: JSX.Element }) {
  let auth = useAuth();
  let location = useLocation();

  if (!auth.user) {
    // Redirect them to the /login page, but save the current location they were
    // trying to go to when they were redirected. This allows us to send them
    // along to that page after they login, which is a nicer user experience
    // than dropping them off on the home page.
    return <Navigate to="/login" state={{ from: location }} />;
  }

  return children;
}

...

<Route
  path="/protected"
  element={
    <RequireAuth>
      <ProtectedPage />
    </RequireAuth>
  }
/>
const PrivateRoute = ({ children }) => {
  const authed = isauth() // isauth() returns true or false based on localStorage
  
  return authed ? children : <Navigate to="/Home" />;
}
<Route
  path="/dashboard"
  element={
    <PrivateRoute>
      <Dashboard />
    </PrivateRoute>
  }
/>
-----------------------
function RequireAuth({ children }: { children: JSX.Element }) {
  let auth = useAuth();
  let location = useLocation();

  if (!auth.user) {
    // Redirect them to the /login page, but save the current location they were
    // trying to go to when they were redirected. This allows us to send them
    // along to that page after they login, which is a nicer user experience
    // than dropping them off on the home page.
    return <Navigate to="/login" state={{ from: location }} />;
  }

  return children;
}

...

<Route
  path="/protected"
  element={
    <RequireAuth>
      <ProtectedPage />
    </RequireAuth>
  }
/>
const PrivateRoute = ({ children }) => {
  const authed = isauth() // isauth() returns true or false based on localStorage
  
  return authed ? children : <Navigate to="/Home" />;
}
<Route
  path="/dashboard"
  element={
    <PrivateRoute>
      <Dashboard />
    </PrivateRoute>
  }
/>
-----------------------
function RequireAuth({ children }: { children: JSX.Element }) {
  let auth = useAuth();
  let location = useLocation();

  if (!auth.user) {
    // Redirect them to the /login page, but save the current location they were
    // trying to go to when they were redirected. This allows us to send them
    // along to that page after they login, which is a nicer user experience
    // than dropping them off on the home page.
    return <Navigate to="/login" state={{ from: location }} />;
  }

  return children;
}

...

<Route
  path="/protected"
  element={
    <RequireAuth>
      <ProtectedPage />
    </RequireAuth>
  }
/>
const PrivateRoute = ({ children }) => {
  const authed = isauth() // isauth() returns true or false based on localStorage
  
  return authed ? children : <Navigate to="/Home" />;
}
<Route
  path="/dashboard"
  element={
    <PrivateRoute>
      <Dashboard />
    </PrivateRoute>
  }
/>
-----------------------
    <Route path="/protected" element={<RequireAuth><ProtectedPage /></RequireAuth>} />
import { Navigate, useLocation } from "react-router";

export const RequireAuth: React.FC<{ children: JSX.Element }> = ({ children }) => {
  let auth = useAuth();
  let location = useLocation();

  if (!auth.user) {
    return <Navigate to="/login" state={{ from: location }} />;
  }

  return children;
};
-----------------------
    <Route path="/protected" element={<RequireAuth><ProtectedPage /></RequireAuth>} />
import { Navigate, useLocation } from "react-router";

export const RequireAuth: React.FC<{ children: JSX.Element }> = ({ children }) => {
  let auth = useAuth();
  let location = useLocation();

  if (!auth.user) {
    return <Navigate to="/login" state={{ from: location }} />;
  }

  return children;
};
-----------------------
{auth && (
  privateRoutes.map(route =>
    <Route
      path={route.path}
      key={route.path}
      element={auth.isAuthenticated ? <route.component /> : <Navigate to={ROUTE_WELCOME_PAGE} replace />}
    />
  )
)}
-----------------------
<Routes>
  <Route exact path="/" element={<Home />} />
  <Route path="/about" element={<About />} />
  <Route path="/dashboard" element={<Dashboard />} />
</Routes>
-----------------------
        <Router>
        <div>
            <Navbar totalItems={cart.total_items}/>
            <Routes>
                <Route exact path='/'>
                    <Route exact path='/' element={<Products products={products} onAddToCart={handleAddToCart}/>}/>
                </Route>
                <Route exact path='/cart'>
                    <Route exact path='/cart' element={<Cart cart={cart}/>}/>     
                </Route>
            </Routes>
        </div>
    </Router>
-----------------------
import { BrowserRouter as Router, Routes, Route, Link } from "react-router-dom";

function App() {
  return (
      <Router>
          <Routes>
            <Route path="/" element={<h1>home page</h1>} />
            <Route path="/seacrch" element={<h1>seacrch page</h1>} />
          </Routes>
      </Router>
  );
}

export default App;
-----------------------
import React from 'react';

import {
  BrowserRouter,
  Routes,
  Route
} from "react-router-dom";

const Header = () => <h2>Header</h2>
const Dashboard = () => <h2>Dashboard</h2>
const SurveyNew = () => <h2>SurveyNew</h2>
const Landing = () => <h2>Landing</h2>


const App = () =>{
  return (
    <div>
      <BrowserRouter>
        <Header />
        <Routes >
        <Route exact path="/" element={<Landing />} />
        <Route path="/surveys" element={<Dashboard />}  />
        <Route path="/surveys/new" element={<SurveyNew/>}  />
        </Routes>
      </BrowserRouter>
    </div>
  );
};
export default App;
-----------------------
import React from "react";
import ReactDOM from "react-dom";

import { BrowserRouter } from "react-router-dom";

import "./index.css";
import App from "./App";

ReactDOM.render(
  <BrowserRouter>
    <App />
  </BrowserRouter>,
  document.getElementById("root")
);
import { Routes, Route } from "react-router-dom";

import AllPages from "./pages/AllPages";
import NewContactsPage from "./pages/ContactsPage";
import FavoritesPage from "./pages/Favorites";

function App() {

  return (
    <div>
      <Routes>
        <Route path="/" element={<AllPages />} />
        <Route path="/new-contacts" element={<NewContactsPage />} />
        <Route path="/favorites" element={<FavoritesPage />} />
      </Routes>
    </div>
  );
}

export default App;
-----------------------
import React from "react";
import ReactDOM from "react-dom";

import { BrowserRouter } from "react-router-dom";

import "./index.css";
import App from "./App";

ReactDOM.render(
  <BrowserRouter>
    <App />
  </BrowserRouter>,
  document.getElementById("root")
);
import { Routes, Route } from "react-router-dom";

import AllPages from "./pages/AllPages";
import NewContactsPage from "./pages/ContactsPage";
import FavoritesPage from "./pages/Favorites";

function App() {

  return (
    <div>
      <Routes>
        <Route path="/" element={<AllPages />} />
        <Route path="/new-contacts" element={<NewContactsPage />} />
        <Route path="/favorites" element={<FavoritesPage />} />
      </Routes>
    </div>
  );
}

export default App;
-----------------------
import { Navigate } from 'react-router-dom';

const Private = (Component) => {
    const auth = false; //your logic

    return auth ? <Component /> : <Navigate to="/login" />
}
<Routes>
    <Route path="/home" element={<Home />} />
    <Route path="/user" element={<Private Component={User} />} />
</Routes>
-----------------------
import { Navigate } from 'react-router-dom';

const Private = (Component) => {
    const auth = false; //your logic

    return auth ? <Component /> : <Navigate to="/login" />
}
<Routes>
    <Route path="/home" element={<Home />} />
    <Route path="/user" element={<Private Component={User} />} />
</Routes>
-----------------------
<Route exact path="/login" element={NotAuth(Login)} />
<Route exact path="/Register" element={NotAuth(Register)} />

function NotAuth(Component) {
  if (isAuth) return <Navigate to="/" />;
  return <Component />; 
}

new NativeEventEmitter()` was called with a non-null argument without the required `addListener` method

copy iconCopydownload iconDownload
import { LogBox } from 'react-native';
LogBox.ignoreLogs(['new NativeEventEmitter']); // Ignore log notification by message
LogBox.ignoreAllLogs(); //Ignore all log notifications
-----------------------
    // Required for rn built in EventEmitter Calls.
    @ReactMethod
    public void addListener(String eventName) {

    }

    @ReactMethod
    public void removeListeners(Integer count) {

    }
@ReactMethod
fun addListener(type: String?) {
    // Keep: Required for RN built in Event Emitter Calls.
}

@ReactMethod
fun removeListeners(type: String?) {
    // Keep: Required for RN built in Event Emitter Calls.
}
-----------------------
    // Required for rn built in EventEmitter Calls.
    @ReactMethod
    public void addListener(String eventName) {

    }

    @ReactMethod
    public void removeListeners(Integer count) {

    }
@ReactMethod
fun addListener(type: String?) {
    // Keep: Required for RN built in Event Emitter Calls.
}

@ReactMethod
fun removeListeners(type: String?) {
    // Keep: Required for RN built in Event Emitter Calls.
}
-----------------------
const eventEmitter = new NativeEventEmitter(NativeModules.CustomModule);
const eventEmitter = new NativeEventEmitter();
-----------------------
const eventEmitter = new NativeEventEmitter(NativeModules.CustomModule);
const eventEmitter = new NativeEventEmitter();
-----------------------
module.exports = {
  presets: ['module:metro-react-native-babel-preset'],
  plugins: [
    "react-native-reanimated/plugin",
  ],
};

Android app won't build -- The minCompileSdk (31) specified in a dependency's androidx.work:work-runtime:2.7.0-beta01

copy iconCopydownload iconDownload
dependencies {
    def work_version = "2.6.0"
    // Force WorkManager 2.6.0 for transitive dependency
    implementation("androidx.work:work-runtime-ktx:$work_version") {
        force = true
    }
}
-----------------------
   > A failure occurred while executing com.android.build.gradle.internal.tasks.CheckAarMetadataWorkAction
      > The minCompileSdk (31) specified in a
        dependency's AAR metadata (META-INF/com/android/build/gradle/aar-metadata.properties)
        is greater than this module's compileSdkVersion (android-30).
        Dependency: androidx.core:core-ktx:1.7.0-alpha02.
configurations.all {
    resolutionStrategy { force 'androidx.core:core-ktx:1.6.0' }
}
-----------------------
   > A failure occurred while executing com.android.build.gradle.internal.tasks.CheckAarMetadataWorkAction
      > The minCompileSdk (31) specified in a
        dependency's AAR metadata (META-INF/com/android/build/gradle/aar-metadata.properties)
        is greater than this module's compileSdkVersion (android-30).
        Dependency: androidx.core:core-ktx:1.7.0-alpha02.
configurations.all {
    resolutionStrategy { force 'androidx.core:core-ktx:1.6.0' }
}
-----------------------
api(group: "androidx.work", name: "work-runtime") {
    version {
        strictly "2.7.0-alpha04"
    }
}
-----------------------
implementation "androidx.core:core-ktx:+" 
implementation "androidx.core:core-ktx:1.6.0"
implementation "androidx.core:core-ktx:+" ->

implementation "androidx.core:core-ktx:1.6.0" 
-----------------------
implementation "androidx.core:core-ktx:+" 
implementation "androidx.core:core-ktx:1.6.0"
implementation "androidx.core:core-ktx:+" ->

implementation "androidx.core:core-ktx:1.6.0" 
-----------------------
implementation "androidx.core:core-ktx:+" 
implementation "androidx.core:core-ktx:1.6.0"
implementation "androidx.core:core-ktx:+" ->

implementation "androidx.core:core-ktx:1.6.0" 
-----------------------
configurations.all {
        resolutionStrategy { force 'androidx.work:work-runtime:2.6.0' }
    }
android {
 defaultConfig {
   //here
 }
}
-----------------------
configurations.all {
        resolutionStrategy { force 'androidx.work:work-runtime:2.6.0' }
    }
android {
 defaultConfig {
   //here
 }
}
-----------------------
dependencies{
implementation 'androidx.work:work-runtime-ktx:2.6.0'
}
-----------------------
implementation 'androidx.core:core-ktx:1.7.0'  and `api 'com.google.android.material:material:1.4.0-alpha07'`
implementation 'androidx.core:core-ktx:1.6.0' and api 'com.google.android.material:material:1.4.0-alpha06'
-----------------------
implementation 'androidx.core:core-ktx:1.7.0'  and `api 'com.google.android.material:material:1.4.0-alpha07'`
implementation 'androidx.core:core-ktx:1.6.0' and api 'com.google.android.material:material:1.4.0-alpha06'
-----------------------
// build.gradle (Module:testApp)

android {
    compileSdkVersion 30
    buildToolsVersion "30.0.3"

    defaultConfig {
        applicationId "myproject.name.testApp"
        minSdkVersion 16 // <--- must be same as under dependencies section
        targetSdkVersion 30
        versionCode 1
        versionName "1.0"

dependencies {

    implementation "org.jetbrains.kotlin:kotlin-stdlib:$kotlin_version"
    implementation 'androidx.core:core-ktx:1.6.0' // <--- Was showing 1.7, it fix problem
    implementation 'androidx.appcompat:appcompat:1.3.1'
-----------------------
implementation "androidx.paging:paging-compose:1.0.0-alpha10"
implementation 'androidx.core:core-ktx:1.6.0'
implementation 'androidx.appcompat:appcompat:1.3.1'
implementation 'com.google.android.material:material:1.4.0'
implementation "androidx.compose.ui:ui:$compose_version"
implementation "androidx.compose.material:material:$compose_version"
implementation "androidx.compose.ui:ui-tooling-preview:$compose_version"
implementation 'androidx.lifecycle:lifecycle-runtime-ktx:2.3.1'
implementation 'androidx.activity:activity-compose:1.3.1'
implementation 'androidx.constraintlayout:constraintlayout:2.1.1'
testImplementation 'junit:junit:4.+'
androidTestImplementation 'androidx.test.ext:junit:1.1.3'
androidTestImplementation 'androidx.test.espresso:espresso-core:3.4.0'
androidTestImplementation "androidx.compose.ui:ui-test-junit4:$compose_version"
debugImplementation "androidx.compose.ui:ui-tooling:$compose_version"
-----------------------
implementation "androidx.paging:paging-compose:1.0.0-alpha10"
implementation 'androidx.core:core-ktx:1.6.0'
implementation 'androidx.appcompat:appcompat:1.3.1'
implementation 'com.google.android.material:material:1.4.0'
implementation "androidx.compose.ui:ui:$compose_version"
implementation "androidx.compose.material:material:$compose_version"
implementation "androidx.compose.ui:ui-tooling-preview:$compose_version"
implementation 'androidx.lifecycle:lifecycle-runtime-ktx:2.3.1'
implementation 'androidx.activity:activity-compose:1.3.1'
implementation 'androidx.constraintlayout:constraintlayout:2.1.1'
testImplementation 'junit:junit:4.+'
androidTestImplementation 'androidx.test.ext:junit:1.1.3'
androidTestImplementation 'androidx.test.espresso:espresso-core:3.4.0'
androidTestImplementation "androidx.compose.ui:ui-test-junit4:$compose_version"
debugImplementation "androidx.compose.ui:ui-tooling:$compose_version"
-----------------------
implementation 'androidx.core:core-ktx:1.7.0'
implementation 'androidx.core:core-ktx:1.6.0'
-----------------------
implementation 'androidx.core:core-ktx:1.7.0'
implementation 'androidx.core:core-ktx:1.6.0'
-----------------------
 implementation 'androidx.appcompat:appcompat:1.4.0'
implementation 'androidx.appcompat:appcompat:1.3.1'
-----------------------
 implementation 'androidx.appcompat:appcompat:1.4.0'
implementation 'androidx.appcompat:appcompat:1.3.1'
-----------------------
Dependency: androidx.appcompat:appcompat:1.4.0.
dependencies {

    implementation 'androidx.appcompat:appcompat:1.3.0'
    ...
    ...
    ...

    /* The minCompileSdk (31) specified in a
    dependency's AAR metadata (META-INF/com/android/build/gradle/aar-metadata.properties)
    is greater than this module's compileSdkVersion (android-30).
    Dependency: androidx.appcompat:appcompat:1.4.0.  */

}
-----------------------
Dependency: androidx.appcompat:appcompat:1.4.0.
dependencies {

    implementation 'androidx.appcompat:appcompat:1.3.0'
    ...
    ...
    ...

    /* The minCompileSdk (31) specified in a
    dependency's AAR metadata (META-INF/com/android/build/gradle/aar-metadata.properties)
    is greater than this module's compileSdkVersion (android-30).
    Dependency: androidx.appcompat:appcompat:1.4.0.  */

}
-----------------------
    compileSdkVersion 29

    targetSdkVersion 29

    implementation 'com.google.android.gms:play-services-ads-lite:20.5.0'

configurations.all {
    resolutionStrategy { force 'androidx.work:work-runtime:2.6.0' }
    resolutionStrategy { force 'androidx.core:core-ktx:1.6.0' }
}
-----------------------
    compileSdkVersion 29

    targetSdkVersion 29

    implementation 'com.google.android.gms:play-services-ads-lite:20.5.0'

configurations.all {
    resolutionStrategy { force 'androidx.work:work-runtime:2.6.0' }
    resolutionStrategy { force 'androidx.core:core-ktx:1.6.0' }
}
-----------------------
 implementation 'androidx.core:core-ktx:1.7.0'
 implementation 'androidx.appcompat:appcompat:1.4.0'
implementation 'androidx.core:core-ktx:1.6.0'
implementation 'androidx.appcompat:appcompat:1.3.0'
-----------------------
 implementation 'androidx.core:core-ktx:1.7.0'
 implementation 'androidx.appcompat:appcompat:1.4.0'
implementation 'androidx.core:core-ktx:1.6.0'
implementation 'androidx.appcompat:appcompat:1.3.0'
-----------------------
android {
compileSdkVersion 31 // Changed to 31

sourceSets {
    main.java.srcDirs += 'src/main/kotlin'
}

defaultConfig {
    applicationId "com.example.blah_blah"
    minSdkVersion 16
    targetSdkVersion 31  //Changed to 31
    versionCode flutterVersionCode.toInteger()
    versionName flutterVersionName
}

buildTypes {
    release {
        // TODO: Add your own signing config for the release build.
        // Signing with the debug keys for now, so `flutter run --release` works.
        signingConfig signingConfigs.debug
    }
}
buildscript {
ext.kotlin_version = '1.6.10' //change here
repositories {
    google()
    jcenter()
}

dependencies {
    classpath 'com.android.tools.build:gradle:4.1.0'
    classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
}
-----------------------
android {
compileSdkVersion 31 // Changed to 31

sourceSets {
    main.java.srcDirs += 'src/main/kotlin'
}

defaultConfig {
    applicationId "com.example.blah_blah"
    minSdkVersion 16
    targetSdkVersion 31  //Changed to 31
    versionCode flutterVersionCode.toInteger()
    versionName flutterVersionName
}

buildTypes {
    release {
        // TODO: Add your own signing config for the release build.
        // Signing with the debug keys for now, so `flutter run --release` works.
        signingConfig signingConfigs.debug
    }
}
buildscript {
ext.kotlin_version = '1.6.10' //change here
repositories {
    google()
    jcenter()
}

dependencies {
    classpath 'com.android.tools.build:gradle:4.1.0'
    classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
}
-----------------------
configurations.all {
        resolutionStrategy { force 'androidx.work:work-runtime:2.6.0' }
    }
android {
 defaultConfig {
   //here
 }
}
-----------------------
configurations.all {
        resolutionStrategy { force 'androidx.work:work-runtime:2.6.0' }
    }
android {
 defaultConfig {
   //here
 }
}
-----------------------
implementation 'androidx.appcompat:appcompat:1.4.1'
implementation 'com.google.android.material:material:1.5.0'
implementation 'androidx.appcompat:appcompat:1.3.1'
implementation 'com.google.android.material:material:1.4.0'
-----------------------
implementation 'androidx.appcompat:appcompat:1.4.1'
implementation 'com.google.android.material:material:1.5.0'
implementation 'androidx.appcompat:appcompat:1.3.1'
implementation 'com.google.android.material:material:1.4.0'

Switch' is not exported from 'react-router-dom'

copy iconCopydownload iconDownload
import {
  BrowserRouter,
  Routes, // instead of "Switch"
  Route,
} from "react-router-dom";

// ...

    <BrowserRouter>
      <Routes>
        <Route exact path="/" element={<Home />}>
          <Home/>
        </Route>
      </Routes>
    </BrowserRouter>
-----------------------
npm install react-router-dom@5

npx create-react-app prompting to globally uninstall non-existent create-react-app package?

copy iconCopydownload iconDownload
npm ls -g create-react-app
npx clear-npx-cache
npx create-react-app@latest --template typescript .
-----------------------
npm ls -g create-react-app
npx clear-npx-cache
npx create-react-app@latest --template typescript .
-----------------------
npm ls -g create-react-app
npx clear-npx-cache
npx create-react-app@latest --template typescript .
-----------------------
npx clear-npx-cache
npx create-react-app proyect-name
-----------------------
npx clear-npx-cache
npx create-react-app proyect-name
-----------------------
 ----> npx create-react-app your-app
-----------------------
npm uninstall -g create-react-app
yarn global remove create-react-app
npm uninstall -g create-react-app
yarn global remove create-react-app
-----------------------
npm uninstall -g create-react-app
yarn global remove create-react-app
npm uninstall -g create-react-app
yarn global remove create-react-app
-----------------------
npm uninstall -g create-react-app
yarn global remove create-react-app
npm uninstall -g create-react-app
yarn global remove create-react-app
-----------------------
npm audit fix --force
npx create-react-app <app
-----------------------
npm audit fix --force
npx create-react-app <app

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QUESTION

Error while creating new React app (&quot;You are running `create-react-app` 4.0.3, which is behind the latest release (5.0.0)&quot;)

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: https://create-react-app.dev/docs/getting-started/

C:\>npm --version
8.3.0
C:\>node --version
v16.13.0

How can I fix this?

ANSWER

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`?

Source https://stackoverflow.com/questions/70358474

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

Vulnerabilities

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.

Support

You can find the React documentation on the website. Check out the Getting Started page for a quick overview.

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