Event Handling in React

This is the App.jsx file. You would render an App Component in the ReactDOM.render method inside the index.js file. You can create your own HTML pages and CSS styles.

import React, { useState } from "react";

function App() {
   const [isMousedOver, setMouseOver] = useState(false);

   function handleMouseOver() {
      setMouseOver(true);
   }

   function handleMouseOver() {
      setMouseOver(false);
   }

   return (
      <div>
         <button
            style={{ backgroundColor: isMousedOver ? "black" : "white" }}
            onMouseOver={handleMouseOver}
            onMouseOut = {handleMouseOut}
         >
            Hover
         </button>
      </div>
   );
}

export default App;