javascript source code of index

import React from "react";
import ReactDOM from "react-dom";
import "./index.css";
import "react-loader-spinner/dist/loader/css/react-spinner-loader.css";
import App from "./App";
import reportWebVitals from "./reportWebVitals";
import { QueryClientProvider, QueryClient } from "react-query";
import { ReactQueryDevtools } from 'react-query/devtools'
import { BrowserRouter } from "react-router-dom";
import { ThemeProvider } from "styled-components"
import preset from '@rebass/preset'

const queryClient = new QueryClient();

ReactDOM.render(
  <React.StrictMode>
    <QueryClientProvider client={queryClient}>
      <ThemeProvider theme={preset}>
        <BrowserRouter>
          <App />
          <ReactQueryDevtools  position="bottom-right" />
        </BrowserRouter>
      </ThemeProvider>
    </QueryClientProvider>
  </React.StrictMode>,
  document.getElementById("root")
);

// If you want to start measuring performance in your app, pass a function
// to log results (for example: reportWebVitals(console.log))
// or send to an analytics endpoint. Learn more: https://bit.ly/CRA-vitals
reportWebVitals();