import * as React from 'react'; import * as ReactDOM from 'react-dom'; import Styletron from 'styletron-client'; import { StyletronProvider } from 'styletron-react'; import { App } from './App'; import { documentReady } from './ready'; async function setup() { await documentReady(); await renderToApp( , ); } function renderToApp(component: JSX.Element) { return new Promise((resolve, reject) => { try { ReactDOM.render(component, document.querySelector('app'), () => { resolve(); }); } catch (ex) { reject(ex); } }); } setup();