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HTML5: How to specify that an option-group should be disabled?

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Solution:

HTML Code:

<!DOCTYPE html><!-- Declares the document type and version of HTML -->
<html><!-- Begins the HTML document -->
<head><!-- Contains metadata about the document -->
<meta charset="utf-8"><!-- Specifies the character encoding of the document -->
<title>How to specify that an option-group should be disabled</title><!-- Sets the title of the document -->
</head><!-- Ends the head section -->
<body><!-- Contains the content of the document -->
<select><!-- Defines a drop-down list -->
<optgroup label="Computer Monitors"><!-- Starts a group of related options for computer monitors -->
<option value="crt">CRT</option><!-- Defines an option for a CRT monitor -->
<option value="lcd">LCD</option><!-- Defines an option for an LCD monitor -->
<option value="led">LED</option><!-- Defines an option for an LED monitor -->
</optgroup><!-- Ends the group of computer monitors -->
<optgroup label="Computer Printers" disabled><!-- Starts a disabled group of related options for computer printers -->
<option value="dot-matrix">Dot-Matrix</option><!-- Defines an option for a dot-matrix printer -->
<option value="ink-jet">Ink-Jet</option><!-- Defines an option for an ink-jet printer -->
<option value="laser">Laser</option><!-- Defines an option for a laser printer -->
</optgroup><!-- Ends the disabled group of computer printers -->
</select><!-- Ends the drop-down list -->
</body><!-- Ends the body section -->
</html><!-- Ends the HTML document -->

Explanation:

  • The HTML document begins with a declaration of its type and version (<!DOCTYPE html>).
  • The <html> element encloses the entire HTML document.
  • The <head> section contains metadata about the document, such as character encoding and title.
  • The <meta charset="utf-8"> tag specifies the character encoding of the document as UTF-8.
  • The <title> tag sets the title of the document.
  • Inside the <body> section, there is a <select> element, which defines a drop-down list.
    • The <optgroup> elements define groups of related options within the drop-down list.
    • Each <optgroup> has a label attribute specifying the label for the group.
    • The second <optgroup> has a disabled attribute, indicating that the entire group is disabled.
    • Inside each <optgroup>, <option> elements define individual options within the group, each with a value attribute representing its value.
  • The HTML document is properly closed with the </html> tag.

Live Demo:

See the Pen ol-type-answer by w3resource (@w3resource) on CodePen.


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https://www.w3resource.com/html-css-exercise/basic/optgroup-disabled-answer.php