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HTML tag

HTML tag is used to group related in a drop down list within makes easier to access the dropdown list especially if list has large number of options.

Syntax

Following are some specifications about the HTML tag

Display	Inline
Start tag/End tag	Both Start and End tag
Usage	Forms and Inputs

Example

     <!DOCTYPE html>
<html>
<head>
	<title>Optgroup Tag</title>
	<style>
		body{
		    text-align: center;
		}
		select{
	                  font-size:20px; 
                                  font-weight:bold; 
                                  color:green; 
		}
	</style>
</head>
<body>
<h2>Example of optgroup tag</h2>
<label>Select your favourite brand</label><br>
<select>
          <optgroup label="Laptop Maufacturur">
	 	<option value="dell">Dell</option>
	 	<option value="hp">HP</option>
	 	<option value="lenovo">Lenovo</option>
	 	<option value="acer">Acer</option>
	 </optgroup>
         <optgroup label="Mobile Manufacturer">
	 	<option value="apple">Apple</option>
	 	<option value="nokia">Nokia</option>
	 	<option value="samsung">Samsung</option>
	 	<option value="coolpad">Coolpad</option>	 
            </optgroup>
</select>
</body>	
</html>

    

Test it Now

Output:

Attribute:

Tag-specific attributes:

Attribute	Value	Description
disabled	disabled	If it is set then options of that optgroup will be disabled.
label	text	It defines the label for the group which will be displayed in the drop-down list. It is required attribute.