The HTML <optgroup> element creates a grouping of options within a <select> element.
The HTML <optgroup> label Attribute text is used to specify a label for an option-group. The disabled attribute is used to specify that an option-group should be disabled.
Syntax:
<optgroup label="name">
Example 1: The following example demonstrates the simple optgroup tag in HTML5.
<!DOCTYPE html>
<html>
<body>
<h1>The optgroup element</h1>
<form action="">
<label for="travel">Choose a mode to travel:</label>
<select name="travel" id="travel">
<optgroup label="Two Wheelers">
<option value="cycle">Cycle</option>
<option value="motor_cycle">Motor Cycle</option>
</optgroup>
<optgroup label="Four Wheelers">
<option value="car">Car</option>
<option value="bus">Bus</option>
</optgroup>
</select>
<br><br>
<input type="submit" value="Submit">
</form>
</body>
</html>
Output:
Example 2: The following example demonstrates the optgroup tag with a disabled attribute.
<!DOCTYPE html>
<html>
<body>
<h1>The optgroup element</h1>
<form action="/action_page.php">
<label for="food_chain">Choose an animal:</label>
<select name="food_chain" id="food_chain">
<optgroup label="Herbivores">
<option value="cow">Cow</option>
<option value="deer">Deer</option>
</optgroup>
<optgroup label="Carnivores">
<option value="tiger">Tiger</option>
<option value="lion">Lion</option>
</optgroup>
<optgroup label="Omnivores" disabled>
<option value="dog">Dog</option>
<option value="fox">Fox</option>
</optgroup>
</select>
<br><br>
<input type="submit" value="Submit">
</form>
</body>
</html>
Output:
