HTML <optgroup> tag represents a group of related options.
The optgroup tag is generally contains a group of related options within dropdown. HTML optgroup tag used along with <option> tag to define options inside dropdown and <select> tag to define dropdown control within web page.
HTML optgroup Tag Sample Code
<html>
<head>
<title>HTML/HTML5 optgroup Tag with Example</title>
</head>
<body>
<select>
<optgroup label="India">
<option value="MH">Maharastra</option>
<option value="GJ">Gujarat</option>
<option value="MP">Madhya Pradesh</option>
</optgroup>
<optgroup label="US">
<option value="MO">Missouri</option>
<option value="NY">New York</option>
<option value="NJ">New Jersey</option>
</optgroup>
</select>
</body>
</html>
HTML optgroup Tag Sample Result
Tag Specific Attributes Support
Following are optgroup tag attributes that are supported by <optgroup> tag.
| Attribute | Value | Description |
|---|---|---|
| label | group_name | Represents the name of the option group in dropdown |
Standard Attributes Support
HTML <optgroup> tag supports mostly all HTML Attributes. Following are some most common attributes that are used by <optgroup> tag. You can get more details about available HTML Attributes here.
| Attribute | Value | Description |
|---|---|---|
| class | user_defined | Represents a style for an element which is used in CSS style sheet |
| id | user_defined | Represents unique id for an element |
| style | css_properties | Represents an inline style for an element for e.g style=”color:red;text-decoration:underline;” |
| title | user_defined | Represents a tooltip information for an elements like img, a, abbr etc |
Event Attributes Support
The “script” is invoked when a certain “event” occurs. Each event handler content attribute deals with a different event. HTML <optgroup> tag supports mostly all HTML Event Attributes. Following are some most common event attributes that are used by <optgroup> tag. You can get more details about available HTML Event Attributes here.
| Attribute | Value | Description |
|---|---|---|
| onclick | script | Event Fires immediately when mouse click on the specified element |
| ondblclick | script | Event Fires immediately when mouse double-click on the specified element |
| onkeydown | script | Event Fires immediately when user is pressing a down key from keyboard |
| onkeypress | script | Event Fires immediately when user presses a key from keyboard |
| onkeyup | script | Event Fires immediately when user releases a key from keyboard |
| onmousedown | script | Event Fires immediately when mouse pointer gets down from an element |
| onmousemove | script | Event Fires immediately when mouse pointer moves over an element |
| onmouseout | script | Event Fires immediately when mouse pointer gets out from an element |
| onmouseover | script | Event Fires immediately when mouse pointer moves over an element |
| onmouseup | script | Event Fires immediately when a mouse pointer is released over an element |
