HTML5: How to specify the number of columns a col element should span?

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 the number of columns a <col> element should span</title>
</head>
<body>

<table class="table table-bordered">
  <colgroup>
    <col span="2" style="background-color:#FF0000">
    <col style="background-color:#FFCC00">
  </colgroup>
  <tr>
    <th>COL-1</th>
    <th>COL-2</th>
    <th>COL-3</th>
  </tr>
  <tr>
    <td>MySQL</td>
    <td>PHP</td>
    <td>SQL</td>
  </tr>
</table>
</body>
</html>

Live Demo:

See the Pen col-span-answer by w3resource (@w3resource) on CodePen.

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HTML-CSS: Tips of the Day

How does the "position: sticky;" property work?

Sticky positioning is a hybrid of relative and fixed positioning. The element is treated as relative positioned until it crosses a specified threshold, at which point it is treated as fixed positioned.

You must specify a threshold with at least one of top, right, bottom, or left for sticky positioning to behave as expected. Otherwise, it will be indistinguishable from relative positioning.

So in your example, you have to define the position where it should stick in the end by using the top property.

HTML Code:

<nav>
  <ul align="left">
    <li><a href="#/contact" class="nav-selections" style="margin-right:35px;">Contact</a></li>
    <li><a href="#/about" class="nav-selections">About</a></li>
    <li><a href="#/products" class="nav-selections">Products</a></li>
    <li><a href="#" class="nav-selections">Home</a></li>
  </ul>
</nav>

CSS Code:

html, body {
  height: 200%;
}

nav {
  position: sticky;
  position: -webkit-sticky;
  top: 0; /* required */
}

.nav-selections {
  text-transform: uppercase;
  letter-spacing: 5px;
  font: 18px "lato", sans-serif;
  display: inline-block;
  text-decoration: none;
  color: white;
  padding: 18px;
  float: right;
  margin-left: 50px;
  transition: 1.5s;
}

.nav-selections:hover {
  transition: 1.5s;
  color: black;
}

ul {
  background-color: #B79b58;
  overflow: auto;
}

li {
  list-style-type: none;
}

Live Demo:

See the Pen html css common editor by w3resource (@w3resource) on CodePen.