195174 2019-02-28 11:04:16 -0800 AX: WebKit not posting SelectedChildrenChangedNotification for combobox 2019-02-28 14:55:50 -0800 1 1 1 Unclassified WebKit Accessibility WebKit Nightly Build All All RESOLVED INVALID InRadar P2 Blocker --- 1 ericliang webkit-unassigned ericliang webkit-bug-importer oldest_to_newest 1510998 0 ericliang 2019-02-28 11:04:16 -0800 WebKit not posting SelectedChildrenChangedNotification for combobox. Unable to use arrow keys to select items in web combo boxes. Steps To Reproduce: 1. Turn on VoiceOver > in Safari, open https://webkit.org/blog-files/aria1.0/combobox_with_live_region_status.html 2. Type "ca" in the search field, and arrow down. Results: Nothing appears to happen when pressing down arrow, VoiceOver does not speak the combo box items and does not appear to select any of the available items. Regression: The way VO handles web combo boxes has started to regress in Sierra, according to <rdar://problem/29642584> Regression: VoiceOver reads incorrect selection in web comboboxes. This appears to have further regressed since, as it’s now no longer possible to select combo box items using arrow keys at all. 1510999 1 363239 ericliang 2019-02-28 11:04:57 -0800 Created attachment 363239 testcase 1511000 2 ericliang 2019-02-28 11:05:29 -0800 <rdar://problem/44551051> 363239 2019-02-28 11:04:57 -0800 2019-02-28 11:04:57 -0800 testcase ARIA Combobox Example.html text/html 13041 ericliang PCFET0NUWVBFIGh0bWw+CjxodG1sIGxhbmc9ImVuIj4KPGhlYWQ+CiAgICA8dGl0bGU+QVJJQSBD b21ib2JveCBFeGFtcGxlPC90aXRsZT4KICAgIDxtZXRhIGh0dHAtZXF1aXY9IkNvbnRlbnQtdHlw ZSIgY29udGVudD0idGV4dC9odG1sOyBjaGFyc2V0PXV0Zi04Ij4KICAgIDxtZXRhIG5hbWU9InZp ZXdwb3J0IiBjb250ZW50PSJ3aWR0aD00ODAiPgogICAgPHN0eWxlIHR5cGU9InRleHQvY3NzIj4K ICAgICAgICBodG1sLCBib2R5IHsKICAgICAgICAgICAgY29sb3I6ICMwMDA7CiAgICAgICAgICAg IGJhY2tncm91bmQtY29sb3I6ICNmZmY7CiAgICAgICAgICAgIGZvbnQtc2l6ZTogMTAwJTsKICAg ICAgICAgICAgZm9udC1mYW1pbHk6IHNhbnMtc2VyaWY7CiAgICAgICAgfQogICAgICAgIFtoaWRk 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