CODEWITHSUNDEEP
javascriptreactjsecmascript-6react-bootstrap
Foysal94
Foysal94

Reputation: 603

ES6+React, Error:React.createElement: type should not be null, undefined, boolean, or number

Learning ReactJS with ES6. Trying to implement React-Bootstrap components. I am also using the react router. I am trying to implement the Navbar component.

It will just be a nabber with the brand and a search box. I aim to expand and use the search box component a lot more so I have put it in its own separate component below.

LocationSearchBox.js

import React, {PropTypes} from 'react'
import Form, {FormGroup, FormControl} from 'react-bootstrap'

export default function LocationSearchBox(props) {
    return (
        <FormGroup>
            <FormControl type="text" placeholder="Search" />
            <Button bsStyle="success" type="submit">Submit</Button>
        </FormGroup>
    )
}

The navber will be on all pages so I have put it in the topmost route and its component is the Main.js file shown below along with routes.js to manage client side routes.

import React, {Component} from 'react';
import {Navbar, NavbarHeader, NavbarBrand, NavbarCollapse} from 'react-bootstrap';
import {default as Search} from './LocationSearchBox'

export default class Main extends Component{

    constructor(props) {
        super(props);
        this.props = props;
    }

    render() {
        return(
            <Navbar>
                <NavbarHeader>
                    <NavbarBrand>
                        <a href="#">React-Bootstrap</a>
                    </NavbarBrand>
                </NavbarHeader>
                <NavbarCollapse>
                    <Search/>
                </NavbarCollapse>
            </Navbar>

        )
    }

}

routes.js

import React from 'react';
import ReactRouter, {Router, Route, IndexRoute, browserHistory} from 'react-router';
import Main from '../components/Main';

export var routes = (
    <Router history={browserHistory}>
        <Route path='/' component={Main} />

    </Router>
);

Index.js is below and is the entry file to use in Webpack/babel

import React from 'react';
import ReactDOM from 'react-dom';
import {routes} from './config/routes';

ReactDOM.render(routes, document.getElementById('root'));

So when i run web pack-dev-server, go to localhost:8080 as the default port the main route should be hitting. I believe it does but I get errors, namely 3 of the same kind.

Warning: React.createElement: type should not be null, undefined, boolean, or number. It should be a string (for DOM elements) or a ReactClass (for composite components). Check the render method of `Main`.

I believe it might be due to the way I am importing the Navbar components in Main.js, such as NavbarHeader, NavbarCollapse etc but that is a guess. I would really appreciate any help in solving this issue, thank you.

Upvotes: 0

Views: 1062

Answers (1)

TimoStaudinger
TimoStaudinger

Reputation: 42460

You are using the Button component without importing it:

<Button bsStyle="success" type="submit">Submit</Button>

Import it correctly and the issue should be resolved.

Upvotes: 1

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