HTML5: How to specify one or more forms the keygen element belongs to?

Last update on February 10 2024 11:42:59 (UTC/GMT +8 hours)

Solution:

HTML Code:

<!DOCTYPE html><!-- Declares the document type and version of HTML -->
<html>
<head>
<meta charset="utf-8"><!-- Specifies the character encoding for the document -->
<title>How to specify one or more forms the keygen element belongs to</title><!-- Sets the title of the document -->
</head>
<body>
<form  method="post" <!-- Begins a form element with the method attribute set to "post", indicating that form data will be submitted via HTTP POST method -->
action="https://www.w3resource.com/html-css-exercise/basic/solution/keygen-answer-demo.php" id="secureform"><!-- Specifies the URL where the form data will be sent upon submission, and assigns an id "secureform" to the form -->
  Email: <input type="text" name="email"><!-- Creates a text input field for entering the email. The name attribute is set to "email" to identify the input data on the server side -->
<input type="submit"><!-- Creates a submit button within the form -->
</form><!-- Ends the form element -->
<p>The keygen field below is outside the form element, but still part of the form.</p><!-- Displays a paragraph -->
Encryption: <keygen name="security" <!-- Creates a key-pair generator field for encryption. The name attribute is set to "security" to identify the input data on the server side -->
form="secureform"><!-- Specifies the id of the form the keygen element belongs to. In this case, it belongs to the form with id "secureform" -->
</body>
</html>

Explanation:

The HTML document starts with a declaration of its type and version (<!DOCTYPE html>).
The <html> element encloses the entire HTML document.
The <head> section contains metadata about the document, including the character encoding (<meta charset="utf-8">) and the title of the document (<title>).
Inside the <body> section, there's a <form> element, which creates a form for user input. The method attribute is set to "post", indicating that form data will be submitted via HTTP POST method. The action attribute specifies the URL where the form data will be sent upon submission, and the id attribute assigns an id "secureform" to the form.
Within the form, there's an input field for entering the email.
Below the form, there's a paragraph displaying text.
There's also a <keygen> element, which creates a key-pair generator field for encryption. The name attribute is set to "security" to identify the input data on the server side, and the form attribute specifies the id of the form the keygen element belongs to. In this case, it belongs to the form with id "secureform".

Live Demo:

See the Pen keygen-form-answer by w3resource (@w3resource) on CodePen.

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