HTML <th> style Attribute

The style attribute on a <th> tag assigns a unique style to the table header cell. A style contains one or more CSS property/value pairs that define the appearance of the th element.

Example

#

A style attribute on a <th> element.

Customers
Denice Hobermann
Paulo Cornell
<style>
  table.tb { width: 250px; border-collapse: collapse; }
  .tb th, .tb td { border: solid 1px #777; padding: 5px; }
</style>

<table class="tb">
  <tr>
    <th style="background-color:lightblue;" colspan="2">Customers</th>
  </tr>
  <tr>
    <td>Denice</td>
    <td>Hobermann</td>
  </tr>
  <tr>
    <td>Paulo</td>
    <td>Cornell</td>
  </tr>
</table>

Using style

The style attribute specifies the style, i.e. look and feel, of the <th> element.

A style contains any number of CSS property/value pairs, separated by semicolons (;).

The style attribute overrides any other style that was defined in a <style> tag or an external CSS file.

This inline styling affects the current <th> element only.


Syntax

<th style="CSS-styles">

Values

#

Value Description
CSS-styles One or more CSS property/value pairs separated by semicolons (;).

More Examples

A style attribute on a <th> element.
Clicking the button toggles the table header cell to dark mode.

Customers
Denice Hobermann
Paulo Cornell

<style>
  table.tbl { width: 250px; border-collapse: collapse; }
  .tbl th, .tbl td { border: solid 1px #777; padding: 5px; }
</style>

<table class="tbl">
  <tr>
    <th id="myth" style="background-color:lightblue;" colspan="2">Customers</th>
  </tr>
  <tr>
    <td>Denice</td>
    <td>Hobermann</td>
  </tr>
  <tr>
    <td>Paulo</td>
    <td>Cornell</td>
  </tr>
</table>

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

<script>
  let toggle = () => {
     let element = document.getElementById("myth");

     if (element.style.backgroundColor === "lightblue") {
       element.style.backgroundColor = "#222";
       element.style.color = "#fff";
    } else {
       element.style.backgroundColor = "lightblue";
       element.style.color = "#222";
    }
  }
</script>

Code explanation

The style attribute assigns a background to the <th> element.

Clicking the button calls JavaScript which toggles the background and text colors to another value.


Browser support

Here is when style 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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