HTML <td> class Attribute

The class attribute on a <td> tag assigns one or more classnames to the table data cell. Classes are used to style elements. Classnames are defined in a stylesheet or in a local <style> element.

Example

#

A class attribute styling <td> elements.

First name Last name
Denice Hobermann
Paulo Cornell
<style>
  table.tb { width:300px; border-collapse: collapse; }
  .tb th, .tb td { border: solid 1px #777; padding: 5px;  }
  .tb th { background: #3630a3; color: white; text-align:left; }
  .tcell { background: #f6f8ff; }
</style>

<table class="tb">
  <tr>
    <th>First name</th>
    <th>Last name</th>
  </tr>
  <tr>
    <td class="tcell">Denice</td>
    <td class="tcell">Hobermann</td>
  </tr>
  <tr>
    <td class="tcell">Paulo</td>
    <td class="tcell">Cornell</td>
  </tr>
</table>

Using class

The class attribute assigns one or more classnames to the <td> tag.

Multiple classnames are separated by a space.

Classes (i.e. classnames) are used for styling the td element.

JavaScript uses classes to access one or more elements by classname.

Tip:  class is a global attribute that can be applied to any HTML element.


Syntax

<td class="classnames">

Values

#

Value Description
classnames One or more space-separated class names.

More Examples

A class attribute styling <td> elements.
Clicking the button toggles a classname that changes the background color of the table cells.

First name Last name
Denice Hobermann
Paulo Cornell

<style>
  table.tb { width:300px; border-collapse: collapse; }
  .tb th, .tb td { border: solid 1px #777; padding: 5px;  }
  .tb th { background: #3630a3; color: white; text-align:left; }
  .tcell { background: #f6f8ff; }
  .tlite { background: #fff; }
</style>

<table class="tb">
  <tr>
    <th>First name</th>
    <th>Last name</th>
  </tr>
  <tr>
    <td class="tcell">Denice</td>
    <td class="tcell">Hobermann</td>
  </tr>
  <tr>
    <td class="tcell">Paulo</td>
    <td class="tcell">Cornell</td>
  </tr>
</table>

<br />
<button onclick="toggle();">Toggle class</button>

<script>
  let toggle = () => {
    let elements = document.getElementsByClassName("tcell");
    [].forEach.call(elements, element => element.classList.toggle("tlite"));
  }
</script>

Code explanation

Two CSS classes are defined in the <style> element.

The class attribute in <td> assigns one classname.

Repeatedly clicking the button calls JavaScript which locates all the <td> tags using classnames.

It then toggles the another class, changing the background and text color.


Browser support

Here is when class support started for each browser:

Chrome
1.0 Sep 2008
Firefox
1.0 Sep 2002
IE/Edge
1.0 Aug 1995
Opera
1.0 Jan 2006
Safari
1.0 Jan 2003

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