React Js Change Button Color on Click

<!DOCTYPE html>
<html>
  <head>
    <script src="https://cdnjs.cloudflare.com/ajax/libs/react/16.14.0/umd/react.development.js"></script>
    <script src="https://cdnjs.cloudflare.com/ajax/libs/react-dom/16.14.0/umd/react-dom.development.js"></script>
    <script src="https://cdnjs.cloudflare.com/ajax/libs/babel-standalone/6.26.0/babel.min.js"></script>
  </head>
  <body>
   
    <div id="app"></div>
    <script type="text/babel">
      const { useState } = React;
      function App() {
        const [btnClass, setBtnClass] = useState("blue-color");

function toggleColor() {
          setBtnClass(
            btnClass === "blue-color" ? "orange-color" : "blue-color"
          );
        }

return (
          <div className="container">
             <h2>React Js Change Color button on Click</h2>
            <button onClick={toggleColor} className={`${btnClass} my-btn`}>
              Toggle Color
            </button>
          </div>
        );
      }

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

.blue-color {
        background: blue;
      }

.orange-color {
        background: orange;
      }
    </style>
  </body>
</html>