ReactJS: Pass parameter from rails to react router to component

Question

I am trying to pass a value from the render function to the component:

= react_component('App', props: {test: 'abc'}, prerender: false)

Routes.jsx

<Route path="/" component={App} >

App.jsx (component)

class App extends React.Component {
  render() {
    return (
      <Header test={this.props.test}>
      </Header>
      {this.props.children}
      <Footer />
    );
  }
}

App.propTypes = { test: PropTypes.string };

There does not seem to be a coherent answer to this complete flow.

I have tried the following:

<Route path="/" component={() => (<App myProp="value" />)}/>

But this still does not answer the question of picking up the value provided by the initial render call(react_component)

Answer 1

Looking for an end to end answer on how to pass a parameter from the "view" to the "react router" to the "component"

We will start from the view:

<%= react_component('MyRoute', {test: 123}, prerender: false) %>

Now we will create a component that holds our route:

class MyRoute extends Component{
  constructor(props){
    super(props)
  }
  render(){
    return(
      <Switch>
        <Route path="/" render={() => <App test={this.props.test} />} />
        <Route path="/login" component={Login} />
      </Switch>
    )
  }
}

As you can see, we passed the test prop from the Route component to the App component. Now we can use the test prop in the App component:

class App extends Component{
  constructor(props){
    super(props)
  }
  render(){
    return(
      <h1>{this.props.test}</h1>
    )
  }
}

Answer 2

<Route path="/" render={attr => <App {...attr} test="abc" />} />