useEffect Demo

useEffect_demo.js

import React, { useState, useEffect } from "react";
import ReactDOM from "react-dom";

const App = () => {
  const [counter, setCounter] = useState(0);
  
  useEffect(() => {
    console.log("useEffect called");
  });

  return (
    <div>
      <p>Counter is {counter}</p>
      <button onClick={() => setCounter(counter + 1)}>Increment</button>
    </div>
  );
};

ReactDOM.render(<App />, document.getElementById("root"));