CODEWITHSUNDEEP
javascriptreactjs
hellogoodnight
hellogoodnight

Reputation: 2129

React : Uncaught Invariant Violation: ReactDOM.render(): Invalid component element

I don't understand why the following code produces the error in the title. I checked similar questions, but I did not find them helpful.

import React from 'react';
import ReactDOM from 'react-dom';
import { Router, Route, IndexRoute, browserHistory } from 'react-router';
import { createHashHistory } from 'history';

import Menu from './pages/Menu';
import BookShelf from './pages/BookShelf';
import BorrowBook from './pages/BorrowBook';

const App = React.createClass({
  contextTypes: {
    router: React.PropTypes.object.isRequired
  },
  render() {
    return (
        <Menu />
      );
    }
});

ReactDOM.render((
  <Router history={browserHistory} onUpdate={() => window.scrollTo(0, 0)}>
    <Route path="/" component={App}/>
    <Route path="/menu" component={Menu} />
    <Route path="/bookshelf" component={BookShelf} />
    <Route path="/borrowbook/:bookId"  component={BorrowBook} />
  </Router>,
  document.getElementById('app')
));

Upvotes: 0

Views: 1386

Answers (1)

sdfsdf
sdfsdf

Reputation: 5590

ReactDOM.render(( // extra parenthesis here
  <Router history={browserHistory} onUpdate={() => window.scrollTo(0, 0)}>
    <Route path="/" component={App}/>
    <Route path="/menu" component={Menu} />
    <Route path="/bookshelf" component={BookShelf} />
    <Route path="/borrowbook/:bookId"  component={BorrowBook} />
  </Router>,
  document.getElementById('app')
)); // extra parenthesis here

The extra parenthesis are making it so that you are actually passing one argument instead of two.

Upvotes: 2

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