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Przeznaczenie atrybutu disabled. Atrybut disabled wykorzystany wraz z elementem optgroup pozwala nam określić czy dany element optgroup oraz treść reprezentowana przez zawartość danego elementu optgroup powinni zostać wyłączeni z interakcji z użytkownikiem.
The disabled attribute can be set to keep a user from selecting the option-group until some other condition has been met (like selecting a checkbox, etc.). Then, a JavaScript is required to remove the disabled value, and make the option-group selectable.
Definition and Usage. 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.
<optgroup> Overview. The <optgroup> element categorizes related <option> items within a <select> dropdown list. This categorization arranges options under a common label, offering a clearer view when multiple option groups are present. Examples and Usage.
On most browsers (tested on latest IE and FF), you can easily change the optgroup's label with CSS only: select optgroup{ background: #000; color: #fff; font-style: normal; font-weight: normal; } Obviously, you can set any classname instead of the select html tag.
23 lut 2017 · Nested grouping is not possible with optgroup tag. It mainly supports two attributes “label” and “disabled”. If an optgroup has the attribute “disabled”, then the particular options will be greyed out by few browsers and users cannot select the options either with keyboard or mouse.
4 dni temu · Lynette Barrett, CEO of National Star College, said central government needs to fix the social care system The chair of a college for young adults with disabilities has urged the government to ...
