An id on a <legend> tag assigns an identifier to the legend.
The identifier must be unique across the page.
An id attribute on a <legend>.
<form action="/tutorial/action.html">
<fieldset>
<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"> Requires Insurance</label><br />
<input type="submit" value="Submit">
</fieldset>
</form>
The id attribute assigns an identifier to the <legend> element.
The id allows JavaScript to easily access the <legend> 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.
<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 (.). |
A <legend> tag with a unique id.
Clicking the button under the form will display the legend text.
<section>
<form action="/tutorial/action.html">
<fieldset>
<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"> Needs Insurance</label><br />
<input type="submit" value="Submit">
</fieldset>
</form>
</section>
<br/>
<button onclick="show();">Show legend</button>
<script>
let show = () => {
let element = document.getElementById("mylegend");
alert("Legend = " + element.innerHTML);
}
</script>
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.
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 <legend>
