WhatsApp-Clone-Client-React/src/index.tsx

import { MuiThemeProvider, createMuiTheme } from '@material-ui/core/styles';
import React from 'react';
import ReactDOM from 'react-dom';
import { ApolloProvider } from '@apollo/react-hooks';
import './index.css';
import App from './App';
import client from './client';
import * as serviceWorker from './serviceWorker';

const theme = createMuiTheme({
  palette: {
    primary: { main: '#2c6157' },
    secondary: { main: '#6fd056' },
  },
});

ReactDOM.render(
  <React.StrictMode>
    <MuiThemeProvider theme={theme}>
      <ApolloProvider client={client}>
        <App />
      </ApolloProvider>
    </MuiThemeProvider>
  </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();