useEffect with no dependencies

useEffect_no_dep.js

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

const App = () => {
  const [counter, setCounter] = useState(0);
  const [username, setUsername] = useState("");

  useEffect(() => {
    console.log("useEffect executed");
  });

  return (
    <div>
      <div>
        <p>Counter value is: {counter} </p>
        <button onClick={() => setCounter(counter + 1)}>Increment</button>
        <br />
        <br />
        Name{" "}
        <input
          type="text"
          name="username"
          value={username}
          placeholder="Enter your name"
          autoComplete="off"
          onChange={event => setUsername(event.target.value)}
        />
        <br />
        {username}
      </div>
    </div>
  );
};

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