A <wo:AjaxBrowser multiple="$true"> - the multi-select form of wonder-select. Pick several fruits (each pick closes the list and clears the search; selections show as removable tags - click a tag's × or press Backspace on the focused trigger to peel off the last one). The same widget as AjaxPopUpButton, driven by the select's multiple attribute. Inside a morphing container to confirm multi survives a morph.