js02.html

<!DOCTYPE html>
<html lang="pt-br">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Manipulando</title>
</head>
<body>
    <h1>Trabalhando com botão</h1>
    <p>Clique no botão para ver o horário local:</p>
    <button 
    type="button" 
    onclick="document.getElementById('hora').innerHTML = Date()">Clique aqui
    </button>
    <p id="hora"></p>

</body>
</html>