Apprentice Apprentice - 12 days ago 6
React JSX Question

cannot use router context [react-router v4]

i want to redirect to either register or login route when button is clicked as the button is responsible to show modal too. I have a showModal function in parent component i.e App that is passed to child component(Nav) as a prop. As my showModal function which is responsible for handling onClick event is in App component, i tried to use router context there but i am getting

undefined
.

Here is my code

index.js

ReactDOM.render(
<Provider store={createStoreWithMiddleware(reducers)}>
<ConnectedIntlProvider>
<Router>
<App />
</Router>
</ConnectedIntlProvider>
</Provider>
, document.querySelector('.app'));

class App extends Component {
constructor(props, context) {
super(props, context);
console.log('context', context);
this.state = { show: false };
}

showModal(e) {
e.preventDefault();
this.setState({ show: true });
this.context.router.transitionTo(e.target.href);
}

hideModal() {
this.setState({ show: false });
}

render() {
return (
<div className="container-fluid">
<Nav
showModal={(e) => this.showModal(e)}
hideModal={() => this.hideModal()}
show={this.state.show}
onHide={() => this.hideModal()}
/>
</div>
);
}
}

App.contextTypes = {
router: React.PropTypes.object
};



const Nav = (props) => (
<div>
<nav className="navbar navbar-default">
<div className="container-fluid">
<div className="navbar-header">
<a className="navbar-brand" href="">
<img
alt="Brand"
className="img-responsive"
src={logo}
role="presentation"
/>
</a>
</div>
<div className="collapse navbar-collapse" id="collapse-1">
<ul className="nav navbar-nav navbar-right nav-social-icon">
<li className="dropdown">
<a
href=""
className="dropdown-toggle"
data-toggle="dropdown"
>
ES
<span className="caret" />
</a>
<ul className="dropdown-menu" style={{ color: '#000', fontWeight: 'bold' }}>
<li onClick={() => props.selectedLocale('en')}>
en
</li>
<li onClick={() => props.selectedLocale('es')}>
es
</li>
</ul>
</li>
<li className="btn-group regLog">
<button
className="btn btn-default"
onClick={props.showModal}
>
<Link to={{ pathname: '/signup' }}>
{props.intl.formatMessage({ id: 'nav.registration.text' }) }
</Link>
</button>
<button
onClick={props.showModal}
className="btn btn-default"
>
<Link to={{ pathname: '/login' }}>
{props.intl.formatMessage({ id: 'nav.login.text' }) }
</Link>
</button>
{props.show ?
<ModalForm
show={props.show}
onHide={props.onHide}
/> : <span />
}
</li>
</ul>
</div>
</div>
</nav>
</div>
);


class ModalForm extends Component {
render() {
const { show, onHide, intl } = this.props;
return (
<Modal
{...this.props}
show={show}
onHide={onHide}
dialogClassName="custom-modal"
>
<Modal.Header closeButton>
<Link to='/login' className="logTitle">
<Modal.Title id="contained-modal-title-lg">
{intl.formatMessage({ id: 'nav.login.text' })}
</Modal.Title>
</Link>
<Link to='/signup' className="logTitle">
<Modal.Title id="contained-modal-title-lg">
{intl.formatMessage({ id: 'nav.registration.text' })}
</Modal.Title>
</Link>
</Modal.Header>
<Modal.Body>
<Match pattern='/login' component={Login} />
<Match pattern='/signup' component={Signup} />
</Modal.Body>
</Modal>
);
}
}


I am using react-router v4.

Answer

Your code is a bit strange because you are using multiple <Router> components. You should only have one <___Router> (either Browser, Hash or Memory) somewhere near the root of your component tree.

ReactDOM.render((
  <BrowserRouter>
    <App />
  </BrowserRouter>
), document.getElementById('root'))

The router context is only available to child elements of a <Router> component. Your <Router> is a child of the <App> component, so the <App> does not have access to the router context variable.

Note: My answer is based off of the code that I can see, which does not include the root of your component tree. If you have another <Router> defined higher up, that should be included in the code which you provide to help to better answer your question.