HTML and CSS Reference
In-Depth Information
Groups related <option> elements within a
<select> menu
class , dir , disabled , id , label , lang , onClick ,
onDblClick , onKeyDown , onKeyPress , onKeyUp ,
onMouseDown , onMouseMove , onMouseOut ,
onMouseOver , onMouseUp , style , title
</optgroup> ; may be omitted in HTML
End tag
Used in
select_content The label attribute
Use the label attribute to define an <optgroup> submenu title to the user.
You should keep the label short and to the point to ensure that the menu
can be displayed easily on a large variety of displays.
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