Lab4(FunctionalComponents).html

<!DOCTYPE html>
<html>
  <head>
    <meta charset="UTF-8" />
    <title>React tutorial</title>
<script src="https://unpkg.com/react@17/umd/react.development.js" crossorigin></script>
<script src="https://unpkg.com/react-dom@17/umd/react-dom.development.js" crossorigin></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/babel-core/5.8.2/browser.min.js"></script>
  </head>
  <body>
    <div id="app"></div><br>
    <div id="app1"></div><br>
    <script type="text/babel">
    class ClassComponent extends React.Component {
          CallMe(){
            alert("Hello");
            
          }
          render() 
          {
            return(
              <div>
                <button onClick={this.CallMe}>
                Class calls
                </button>
              <h1> class </h1>
              </div>
            );
          }
    }
   function FirstComponent() {
     function CallMe(){
       alert("Hello");
     }
      return(
        <div>
          <button onClick={CallMe}>
         Functions call
          </button>
           <h1> Functions </h1>
          </div>
        );
    }
   ReactDOM.render(
      <FirstComponent />,
      document.getElementById('app')
    );
    ReactDOM.render(
      <ClassComponent />,
      document.getElementById('app1')
    );
    </script>
  </body>
</html>