HTML <td> id Attribute

The id attribute on a <td> tag assigns an identifier to the table data cell element. The identifier must be unique across the page.

Example

#

An id attribute on 3 <td> elements.

First name Last name
Denice Hobermann
Paulo Cornell
Jane Hollander
<style>
  table.tb { width:300px; border-collapse: collapse; }
  .tb th, .tb td { border: solid 1px #777; padding: 5px; }
  .tb th {background-color: lightblue; }
</style>

<table class="tb">
  <tr>
    <th>First name</th>
    <th>Last name</th>
  </tr>
  <tr>
    <td id="18">Denice</td>
    <td>Hobermann</td>
  </tr>
  <tr>
    <td id="24">Paulo</td>
    <td>Cornell</td>
  </tr>
  <tr>
    <td id="50">Jane</td>
    <td>Hollander</td>
  </tr>
</table>

Using id

The id attribute assigns an identifier to the <td> element.

The identifier must be unique across the page.

The id allows programmatic access to the <td> element.

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


Syntax

<td id="identifier" />

Values

#

Value Description
identifier A unique alphanumeric string. The id value must begin with a letter ([A-Za-z]) and may be followed by any number of letters, digits ([0-9]), hyphens (-), underscores (_), colons (:), and periods (.).

More Examples

A <td> with a unique id attribute.
Clicking the button displays the text in the first table cell.

First name Last name
Denice Hobermann
Paulo Cornell
Jane Hollander

<style>
  table.tbl { width:300px; border-collapse: collapse; }
  .tbl th, .tbl td { border: solid 1px #777; padding: 5px; }
  .tbl th {background-color: lightblue; }
</style>

<table class="tbl">
  <tr>
    <th>First name</th>
    <th>Last name</th>
  </tr>
  <tr>
    <td id="mytd">Denice</td>
    <td>Hobermann</td>
  </tr>
  <tr>
    <td>Paulo</td>
    <td>Cornell</td>
  </tr>
  <tr>
    <td>Jane</td>
    <td>Hollander</td>
  </tr>
</table>

<br />
<button onclick="show();">Show td content</button>

<script>
  let show = () => {
     let element = document.getElementById("mytd");
     alert("Content = " + element.innerHTML);
  }
</script>

Code explanation

The id attribute assigns a unique identifier for the <td>.

Clicking the button calls JavaScript which locates the <td> using the id.

Finally, the content of the <td> element is displayed in an alert box.


Browser support

Here is when id 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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