support optgroup in FilteringSelect and ComboBox

[anno]

I would be great that Dojo supports "optgroup" tags like you would not use Dojo framework.

example:

<select name="Namen" size="6">
      <optgroup label="Namen mit A">
        <option label="Anna">Anna</option>
        <option label="Achim">Achim</option>
        <option label="August">August</option>
      </optgroup>
</select>

I tested it with code from ​this page of dojo page but this doesn't work if I want use "optgroup" tags

[bill]

There was a request about this way back in #1887.

It seems like this feature would work better on dijit.form.Select than on dijit.form.FilteringSelect, since the main purpose of FilteringSelect is to filter results based on typed string, at which point the grouping might be difficult.

[Jonathan Bond-Caron]

I've done some work on this in #11167

It could work on dijit.form.Select, dijit.form.FilteringSelect? and dijit.form.ComboBox?

[Karl Tiedt]

Patch and ticket from person who has a CLA on file can be found here at ticket #11167

[bill]

#16653 is a duplicate of this ticket.

[dylan]

We would need an updated patch to consider this for 1.10. Given the lack of activity, I'm closing it. Feel free to reopen with an updated patch if interested in seeing this feature.