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

Last update on August 19 2022 21:50:51 (UTC/GMT +8 hours)

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.

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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.