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1. www.w3schools.com › TAgs › tag_optgroupHTML <optgroup> Tag - W3Schools

   www.w3schools.com › TAgs › tag_optgroup

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   The <optgroup> tag is used to group related options in a <select> element (drop-down list). If you have a long list of options, groups of related options are easier to handle for a user.

   • Label

     Label - HTML <optgroup> Tag - W3Schools

   • Option

     Definition and Usage. The <option> tag defines an option in...

   • Ol

     Ol - HTML <optgroup> Tag - W3Schools

   • HTML

     A disabled option-group is unusable and un-clickable. The...

   • OptionGroup Object

     OptionGroup Object - HTML <optgroup> Tag - W3Schools

2. developer.mozilla.org › en-US › docs<optgroup>: The Option Group element - MDN Web Docs

   developer.mozilla.org › en-US › docs

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   25 lip 2024 · The <optgroup> HTML element creates a grouping of options within a <select> element.

3. developer.mozilla.org › pl › docs<select>: The HTML Select element - MDN Web Docs

   developer.mozilla.org › pl › docs

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   11 paź 2024 · You can include a selected attribute on an <option> element to make it selected by default when the page first loads. A <select> element is represented in JavaScript by an HTMLSelectElement object, and this object has a value property which contains the value of the selected <option> .

4. stackoverflow.com › questions › 14029080How to add Option group in HTML select? - Stack Overflow

   stackoverflow.com › questions › 14029080

   11 lip 2016 · Use select option in optgroup as discuss above. But I will show how to group select in Angular in *ngFor loop

5. www.kurshtml.edu.pl › html › optgroup,htmlOPTGROUP - Komendy HTML 4.01 - Kurs HTML dla zielonych

   www.kurshtml.edu.pl › html › optgroup,html

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   9 kwi 2012 · OPTGROUP. Grupuje opcje (OPTION) w liście wyboru (SELECT). Zobacz więcej... Atrybuty: CLASS="klasa". Przypisuje nazwę klasy (CSS) lub nazwy klas do elementu, które muszą być rozdzielone białymi znakami. DIR="kierunek".

6. www.w3docs.com › learn-html › html-optgroup-tagHTML <optgroup> Tag - W3docs

   www.w3docs.com › learn-html › html-optgroup-tag

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   HTML <optgroup> tag contains <option> tags combined into one group. (The <option> tag defines items in a drop-down list defined by the <select> tag. The content of the <optgroup> tag looks like a heading in bold.

7. www.techonthenet.com › html › elementsHTML: <optgroup> tag - TechOnTheNet

   www.techonthenet.com › html › elements

   The HTML <optgroup> tag creates a group of options within a dropdown list of values in the <select> control. These dropdown values are defined by a series of <option> tags and grouped using the <optgroup> tag.