I am new to React and I am building my first application with React, Redux, and React Router, so far I have successfully set up my boiler plate, however when I want to use React-Router and create routes I get the following error
TypeError: Cannot read property 'string' of undefined
./node_modules/react-router-dom/es/BrowserRouter.js
node_modules/react-router-dom/es/BrowserRouter.js:38
35 | }(React.Component);
36 |
37 | BrowserRouter.propTypes = {
> 38 | basename: PropTypes.string,
39 | forceRefresh: PropTypes.bool,
40 | getUserConfirmation: PropTypes.func,
41 | keyLength: PropTypes.number,
This only happens when I try to import and use
import { BrowserRouter, Route } from 'react-router-dom';
Here is my index.js
import React, { Component } from 'react';
import ReactDOM from 'react-dom';
import { Provider } from 'react-redux';
import store from './store'
import { BrowserRouter, Route } from 'react-router-dom';
import './index.css';
import App from './App';
import registerServiceWorker from './registerServiceWorker';
class Hello extends Component {
render(){
return(
<div>Hello</div>
)
}
}
class GoodBye extends Component {
render(){
return(
<div>GoodBye</div>
)
}
}
ReactDOM.render(<Provider store={store}>
<BrowserRouter>
<Route path="/hello" component={Hello}/>
<Route path="/goodbye" component={GoodBye}/>
</BrowserRouter>
</Provider>, document.getElementById('root'));
registerServiceWorker();
And my package.json
{
"name": "reactreduxrouterblog",
"version": "0.1.0",
"private": true,
"dependencies": {
"axios": "^0.16.2",
"react": "^16.0.0",
"react-dom": "^16.0.0",
"react-redux": "^5.0.6",
"react-router": "^2.0.0-rc5",
"react-router-dom": "^4.0.0",
"redux": "^3.7.2",
"redux-logger": "^3.0.6",
"redux-promise-middleware": "^4.4.1",
"redux-thunk": "^2.2.0"
},
"devDependencies": {
"react-scripts": "1.0.14"
},
"scripts": {
"start": "react-scripts start",
"build": "react-scripts build",
"test": "react-scripts test --env=jsdom",
"eject": "react-scripts eject"
}
}
Any knowledge will be welcomed thanks!
The "Cannot read property 'props' of undefined" error occurs when a class method is called without having the correct context bound to the this keyword. To solve the error, define the class method as an arrow function or use the bind method in the classes' constructor method.
React Router is a standard library for routing in React. It enables navigation between views from different components in a React application, allows the browser URL to be changed, and keeps the UI in sync with the URL.
Update your react-router-dom
in package.json: react-router-dom ^4.2.2
Sometimes it may cause due to incompatible versions of "react-router-dom" and "react-router-prop-types". For me it worked with following configuration.
react-router-dom:"^4.2.2",
react-router-prop-type:"^3.2.1"
Try adding the PropTypes package to your app.
basename: PropTypes.string
Looks like you are just missing that package.
EDIT:
Be sure to run npm install
to install all dependencies.
import React from 'react'; <--as normal
import PropTypes from 'prop-types'; <--add this as a second line
App.propTypes = {
monkey: PropTypes.string, <--omit "React."
cat: PropTypes.number.isRequired <--omit "React."
};
//Wrong: React.PropTypes.string
//Right: PropTypes.string
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