WebAIM - Web Accessibility In Mind

E-mail List Archives

Re: A question about role slider and android TalkBack with chrome WebView


From: Patrick H. Lauke
Date: Aug 13, 2019 4:08AM

And in answer to the part about AOM: yes, the idea is that with AOM you’ll be able to also intercept volume keys/swipes (basically, the “intent” of the user to change the value) via JavaScript ... but as it’s far from ubiquitous, that’s not a sufficiently “accessibility supported” solution to tackle the problem and call it accessible. Sliders that fail to be operable this way arguable fail WCAG 2.1 2.5.1 currently.


> On 13 Aug 2019, at 11:03, Patrick H. Lauke < <EMAIL REMOVED> > wrote:
> many of the ARIA practices are primarily designed for desktop/keyboard. there’s a number of patterns that simply don’t work on touchscreen+AT scenarios https://www.w3.org/TR/wai-aria-practices-1.1/#mobile_and_touch_support / https://github.com/w3c/aria-practices/issues/8
> Prime example is slider - it is simply not suitable for any touch scenarios, as AT on touch devices treats sliders like native sliders (where you CAN use volume keys to change the value on Android, or swipe up/down to change value on iOS) ... but the interaction is simply not possible to implement/detect with JavaScript for “faked” ARIA sliders.
> https://patrickhlauke.github.io/aria/presentation/?full#155
> For this reason, I’ve been strongly advocating NOT following the ARIA slider pattern unless you’re 100% sure only desktop/keyboard/AT users will use your site.
> Instead, consider using a real <input type=“range”> which can be reasonably nicely styled with CSS. or, if you really must, use a “faked” slider (but WITHOUT any of the slider ARIA) and have a real range input in the background that actually gets interacted with - see https://codepen.io/patrickhlauke/pen/byWPMX (which is also - in a slightly expanded form - an example technique for WCAG 2.1 SC 2.5.1
> https://www.w3.org/WAI/WCAG21/Techniques/general/G216)
> P
>> On 13 Aug 2019, at 07:04, 김형섭 < <EMAIL REMOVED> > wrote:
>> Hi, I’m Hyongsop Kim from Korea and accessibility tester.
>> To test role slider, I referred wai-aria authoring practices slide example site.
>> Within this site, it is posble to use slider with keyboard with my screen reader with no problem.
>> By the way, with my android TalkBack with chrome WebView, TalkBack says it is slider and you can press volume button to set, but my volume button is not working.
>> By the way, within youtube mobile web with android chrome WebView, it is possible to use time adjustable slider with volume key.
>> Therefore I really wondering to let adjust slider with volume key for TalkBack users, what kind of script should I use.
>> Is it only working within accessibility object model?
>> But in case of youtube mobile web, my chrome is not canary, but I can adjust slider with volume key with TalkBack.
>> Please help me.
>> Thank you.
>> 김형섭 / Hyongsop Kim
>> (주)엔비전스 / 웹접근성사업팀 팀장
>> 서울시 종로구 가회동 1-29
>> 1-29 Gahoe-dong, Jongno-gu, Seoul, Korea
>> T. +82 2 313 9977 F. +82 2 313 3645 M. +82 10 3316 5996
>> http://dialogueinthedark.co.kr
>> http://cafe.naver.com/dialogueinthedark
>> >> >> >> > > > >