HTML <label> id Attribute

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

Example

#

An id attribute on 2 <label> elements.

User Information  

 

<form action="/tutorial/action.html">
  <fieldset>
    <legend>User Information</legend>
    <label for="firstname" id="label-firstname">First name</label> &nbsp;
    <input type="text" id="firstname" name="firstname"><br /><br />

    <label for="lastname" id="label-lastname">Last name</label> &nbsp;
    <input type="text" id="lastname" name="lastname"><br /><br />

    <input type="submit" value="Submit">
  </fieldset>
</form>

Using id

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

The identifier must be unique across the page.

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

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


Syntax

<label 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 <label> tag with a unique id.
Clicking the button displays the label text.



<form>
  <label id="mylabel" for="firstname">First Name</label><br />
  <input type="text" id="firstname" name="firstname">
</form>
  
<br />
<button onclick="show();">Show label</button>

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

Code explanation

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

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

Finally, the content of the <label> 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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