Crypto-DAPP-No-Web3.js

import logo from './logo.svg';
import './App.css';
// These imports are important
import React, { useState, useEffect } from 'react';
import Web3 from 'web3-eth'


function App() {

  // this will trigger whenever the App function is called, which index.js runs at startup
  useEffect(() => {
    // Here we check if there is web3 support
    if (typeof web3 !== 'undefined') {

    }else {
      // The browser has no web3 
      // Suggest the user to install a web3 compatible browser plugin
      throw new Error("No web3 support, redirect user to a download page or something :) ");
    }
  });

  return (
    <div className="App">
      <header className="App-header">
        <p> Welcome to your DAPP application</p>
      </header>
    </div>
  );
}

export default App;