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https://developer.mozilla.org/en-US/docs/Web/HTML/Element/optgroup
Mar 24, 2019 · Attributes. This element includes the global attributes.. disabled If this Boolean attribute is set, none of the items in this option group is selectable. Often browsers grey out such control and it won't receive any browsing events, like mouse clicks or focus-related ones.
https://html.com/tags/optgroup/
Grouping List Options. The optgroup element is used to group options in a drop-down list, with the aim of making the list easier to navigate. The functionality essentially splits large numbers of <option> items into small sections. Note that the label attribute is required, and will be rendered as the first item in the section. The user cannot select the label as a choice.
https://stackoverflow.com/questions/26688897/how-to-deal-with-different-behaviours-for-optgroup-in-different-browsers
The three browsers then also have differing opinions on whether background css colour applied to the optgroup should be applied to the child selects or not. And …
https://stackoverflow.com/questions/7452479/how-to-change-the-style-of-a-select-box-optgroup-label
Stack Overflow for Teams is a private, secure spot for you and your coworkers to find and share information. ... Note: On most of the mentioned browsers, the entire <optgroup> section is styled, not just the label. – Kenneth K. Jul 28 '13 at 7:26. If you apply styles to option tags as well as to optgroup tags, ...
https://www.w3schools.com/TAGs/tag_optgroup.asp
The <optgroup> 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 handle for a user. Browser Support
https://www.codeproject.com/articles/15505/asp-net-dropdownlist-with-optiongroup-support
Sep 07, 2006 · One such notable omission is that of OptionGroup (<optgroup>) support in the DropDownList control. For those unfamiliar with the <optgroup> element, it is part of the XHTML standard, and has the effect of categorising items in a <select>, as the following image shows.4.8/5(39)
https://demos.jquerymobile.com/1.0.1/docs/forms/selects/custom.html
The custom menu supports disabled options and multiple selection (whereas native mobile OS support for both is inconsistent), adds an elegant way to handle placeholder values, and restores missing functionality on certain platforms such as optgroup support on Android (all explained below). In addition, the framework applies the custom button's ...
https://github.com/w3c/html/issues/932
May 26, 2017 · <optgroup> is useful for displaying options to users, but browsers don't support it with <datalist>. 4.10.9 The optgroup element has only one context specified for <optgroup>. As a child of a select element. This issue suggests adding another. As a child of a datalist element.
http://htmlhelp.com/reference/html40/forms/optgroup.html
Current browsers generally ignore each OPTION's LABEL, showing the content of the OPTION element instead. Note that, in HTML 4, OPTGROUP is limited to containing only OPTION elements, thus preventing nested OPTGROUPs with multi-level cascades. Future versions of HTML may add support for nested option groups.
https://electrictoolbox.com/style-optgroup-option-css-chrome/
This post is part of a series looking at how to style optgroup and options with CSS. Previously I have looked at Firefox, Internet Explorer, Opera, Safari and this post looks at Google Chrome. Next week's HTML/CSS post will present the findings in a tabular format so it's easy to see what can and can't be styled consistently across browsers.
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