HTML5: How to specify one or more forms the keygen element belongs to?
Solution:
HTML Code:
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>How to specify one or more forms
the keygen element belongs to</title>
</head>
<body>
<form method="post"
action="https://www.w3resource.com/html-
css-exercise/basic/solution/keygen-
answer-demo.php" id="secureform">
Email: <input type="text" name="email">
<input type="submit">
</form>
<p>The keygen field below is outside the
form element, but still part of the
form.</p>
Encryption: <keygen name="security"
form="secureform">
</body>
</html>
Live Demo:
See the Pen keygen-form-answer by w3resource (@w3resource) on CodePen.
See the solution in the browser
Supported browser
![]() |
![]() |
![]() |
![]() |
![]() |
Yes | Yes | Yes | Yes | Yes |
What is the difficulty level of this exercise?
Test your Programming skills with w3resource's quiz.
HTML-CSS: Tips of the Day
Why is vertical-align: middle not working on my span or div?
This seems to be the best way - some time has passed since my original post and this is what should be done now:
HTML Code:
<div class="main"> <div class="inner"> This </div> </div>
CSS Code:
.main { display: table; /* optional css start */ height: 90px; width: 90px; /* optional css end */ } .inner { border: 1px solid #000000; display: table-cell; vertical-align: middle; }
Live Demo:
See the Pen html css common editor by w3resource (@w3resource) on CodePen.
- Weekly Trends
- Java Basic Programming Exercises
- SQL Subqueries
- Adventureworks Database Exercises
- C# Sharp Basic Exercises
- SQL COUNT() with distinct
- JavaScript String Exercises
- JavaScript HTML Form Validation
- Java Collection Exercises
- SQL COUNT() function
- SQL Inner Join
- JavaScript functions Exercises
- Python Tutorial
- Python Array Exercises
- SQL Cross Join
- C# Sharp Array Exercises