An id on a <textarea> tag assigns an identifier to the textarea.
The identifier must be unique across the page.
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>
The id attribute assigns an identifier to the <textarea> element.
The id allows JavaScript to easily access the <textarea> element.
It is also used to point to a specific id selector in a style sheet.
Tip: id is a global attribute that can be applied to any HTML element.
<textarea id="identifier" />
| 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 (.). |
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>
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.
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 |
Back to <textarea>
