kikikan/backend/resources/js/admin/admin.js

import React, { Component } from 'react';

import { BrowserRouter, Route, Switch } from 'react-router-dom';

import Meeting from './meeting';
import Side from './side';

export default class AdminApp extends Component {
    render() {
        return (
            <main className="l-container meeting-consent">
            <BrowserRouter>
                <Switch>
                    <Route exact path='/admin/meeting' component={Meeting} />    
                </Switch>
                <Side />
            </BrowserRouter>
        </main>
        );
    }
}