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HTML optgroup tag - W3Schools
Definition and Usage. The is used to group related options in a drop-down list. If you have a long list of options, groups of related options are easier to ...
- Mozilla Developer Network
The HTML optgroup element creates a grouping of options within a select element.
HTML/Elements/optgroup - W3C Wiki
The element represents a group of option elements with a common label. Point. The label attribute must be specified. HTML Attributes
OPTGROUP - Option Group - HTMLHelp
A description of HTML 4's OPTGROUP element for option groups in a select menu.
optgroup element | optGroup object (Internet Explorer)
Allows authors to group choices logically in a select element.
HTML optgroup label Attribute - W3Schools
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HTML DOM OptionGroup Object - W3Schools
OptionGroup Object. The OptionGroup object represents an HTML element. Access an OptionGroup Object. You can access an element by using ...
HTML Tag: optgroup | HTML Dog
Attribute Description Possible values; disabled: Renders the options within the option group non-selectable. None. Global attributes
Jquery – Select optgroup in select - Stack Overflow
I have a select with 2 optgroups. Is there a way to call an function only if an option from the first optgroup is selected and call another function if an option from ...