#ce code utilise id="frm1"
#testé et modifié
<!DOCTYPE html>
<html>
<body>
<h2>JavaScript HTML DOM</h2>
<p>on trouve l'élément HTML en utilisant 'document.forms'</b>.</p>
<form id="frm1" action="/action_page.php">
First name: <input type="text" name="fname" value="Dwayne"><br>
Last name: <input type="text" name="lname" value="Johnson"><br><br>
<input type="submit" value="Submit">
</form>
<p>voici les données de chaque élément mis en forme:</p>
<p id="demo"></p>
<script>
const x = document.forms["frm1"];
let text = "";
for (let i = 0; i < x.length ;i++) {
text += x.elements[i].value + "<br>";
}
document.getElementById("demo").innerHTML = text;
</script>
</body>
</html>
#code regarde l'heure et dit bonjour de façon adaptée
#testé et modifié
<!DOCTYPE html>
<html>
<body>
<h2>JavaScript if</h2>
<p>Display "Good day!" if the hour is less than 11:00:</p>
<p id="demo">Good Evening!</p>
<script>
if (new Date().getHours() < 11) {
document.getElementById("demo").innerHTML = "Good day!";
}
</script>
</body>
</html>
ca nous donne: Good Evening!