HTML <textarea> id Attribute

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

Example

#

An id attribute on a <textarea> element.


<label for="message">Message</label><br/>
<textarea id="message" rows="3" cols="50"
          placeholder="Enter your message...">
</textarea>

Using id

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

The identifier must be unique across the page.

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

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


Syntax

<textarea id="identifier" />

Values

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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 <textarea> with a unique id attribute. Enter some text.
Clicking the button displays the text in the textarea.




<label for="textarea">Message</label><br/>
<textarea id="mytextarea" rows="3" cols="50"
          placeholder="Enter your message ...">
</textarea>
  
<br /><br />
<button onclick="show();">Show textarea value</button>

<script>
  let show = () => {
    let element = document.getElementById("mytextarea");
    alert("Value = " + element.value);
  }
</script>

Code explanation

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

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

Finally, the value of the <textarea> 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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