BotZ/bot.z_web/src/App.js

import React from 'react';
import IndexPage from './IndexPage.js';


class App extends React.Component {
    constructor(props) {
        super(props)

        this.state = {targetUrl: props.targetUrl, loggedIn: false}
    }

    componentDidMount() {
        fetch(this.targetUrl + '/status', {credentials: 'include'})
            .then(response => response.json())
            .then(data => this.setState({loggedIn: data.logged_in}));
    }

    render() {
        return (
          <div id="main" className="container">
            <IndexPage targetUrl={this.state.targetUrl} loggedIn={this.state.loggedIn} />
          </div>
        );
    }

}

export default App;