javascript source code of index

import React from "react";
import ReactDOM from "react-dom";
import { Provider } from "react-redux";
import Routes from "./routes";
import storeConfig from "./store";
import { PersistGate } from "redux-persist/integration/react";
import { createMuiTheme, ThemeProvider } from "@material-ui/core/styles";
import { grey } from "@material-ui/core/colors";
const { persistor, store } = storeConfig;

const theme = createMuiTheme({
  overrides: {
    MuiAppBar: {
      colorPrimary: {
        backgroundColor: grey[800],
      },
    },
    MuiToolbar: {
      dense: {
        minHeight: 0,
        maxHeight: 32,
      },
    },
  },
});

ReactDOM.render(
  <React.StrictMode>
    <Provider store={store}>
      <PersistGate loading={<p>Loading</p>} persistor={persistor}>
        <ThemeProvider theme={theme}>
          <Routes />
        </ThemeProvider>
      </PersistGate>
    </Provider>
  </React.StrictMode>,
  document.getElementById("root")
);

// If you want your app to work offline and load faster, you can change
// unregister() to register() below. Note this comes with some pitfalls.
// Learn more about service workers: https://bit.ly/CRA-PWA
// serviceWorker.unregister();