HTML <fieldset> id Attribute

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

Example

#

An id attribute on a <fieldset>.

Vehicle Details





<form action="/tutorial/action.html">
  <fieldset id="vehicle-fieldset">
    <legend>Vehicle Details</legend>

    <input type="text" placeholder="Make" name="make"><br /><br />
    <input type="text" placeholder="Model" name="model"><br /><br />
    <input type="text" placeholder="Age" name="age"><br /><br />

    <button type="submit">Submit</button>
  </fieldset>
</form>

Using id

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

The identifier must be unique across the page.

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

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


Syntax

<fieldset id="identifier" />

Values

#

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

More Examples

A <fieldset> element with a unique id.
Clicking the bottom button clears all the fieldset's input fields that have been entered.

Vehicle Details






<form action="/tutorial/action.html">
  <fieldset id="myfieldset">
    <legend>Vehicle Details</legend>
  
    <input type="text" placeholder="Make" name="make"><br /><br />
    <input type="text" placeholder="Model" name="model"><br /><br />
    <input type="text" placeholder="Age" name="age"><br /><br />
  
    <button type="submit">Submit</button>
  </fieldset>
</form>

<br/>
<button onclick="reset();">Reset values</button>

<script>
  let reset = () => {
    let elements = document.getElementById("myfieldset").getElementsByTagName("input");
    [].forEach.call(elements, element => {
        element.value = "";
    });
  }
</script>

Code explanation

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

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

Javascript locates all the <input> elements inside the <fieldset> and sets all their values to empty string.


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

You may also like

 Back to <fieldset>
Guides