HTML <legend> id Attribute

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



An id attribute on a <legend>.

Customer Information

<form action="/tutorial/action.html">
    <legend id="customer-legend">Customer Information</legend>

    <input type="text" placeholder="First Name" name="firstname"><br /><br />
    <input type="text" placeholder="Last Name" name="lastname"><br /><br />
    <input type="text" placeholder="City" name="city"><br /><br />
    <input type="checkbox" id="insurance" name="requiresinsurance" value="yes">
    <label for="insurance"> &nbsp; Requires Insurance</label><br />

    <input type="submit" value="Submit">

Using id

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

The identifier must be unique across the page.

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

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


<legend 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 (.).

More Examples

A <legend> tag with a unique id.
Clicking the button under the form will display the legend text.

Customer Information

  <form action="/tutorial/action.html">
      <legend id="mylegend">Customer Information</legend>
      <input type="text" placeholder="First Name" name="fname"><br /><br />
      <input type="text" placeholder="Last Name" name="lname"><br /><br />
      <input type="text" placeholder="Email" name="email"><br /><br />
      <input type="checkbox" id="needinsurance" name="needsinsurance" value="yes">
      <label for="needinsurance"> &nbsp; Needs Insurance</label><br />
      <input type="submit" value="Submit">

<button onclick="show();">Show legend</button>

  let show = () => {
    let element = document.getElementById("mylegend");
    alert("Legend = " + element.innerHTML);

Code explanation

The id attribute assigns a unique identifier to the <legend> element.

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

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

Browser support

Here is when id support started for each browser:

1.0 Sep 2008
1.0 Sep 2002
1.0 Aug 1995
1.0 Jan 2006
1.0 Jan 2003

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