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Vertical vs. horizontal scrolling on a mobile device

From: Mike Elledge <melledge@yahoo.com>
Date: Thu, 28 Mar 2019 18:36:06 +0000 (UTC)
To: WCAG List <w3c-wai-gl@w3.org>
Message-ID: <151433742.11563610.1553798166485@mail.yahoo.com>
Hi All--
I've tried searching the lists, but haven't found anything addressing this question.
When is horizontal scrolling more accessible than vertical scrolling on a mobile device? Always? Never? Sometimes?
For example, envision a vertically arrayed set of categories.  Touching each category heading causes an accordion to open, displaying a subset of items. 
Is it better to have the subset appear horizontally, requiring horizontal swiping or touching, or is it better to have the subset appear vertically, requiring vertical swiping?
I know that horizontal scrolling on a desktop is to be avoided, but horizontal scrolling seems to be, from a design standpoint, acceptable on a mobile device, to limit the length of page.
What if the number of subitems arrayed vertically is quite long; is it permissible to have scrolling within the array?
Any thoughts would be greatly appreciated!
Received on Thursday, 28 March 2019 18:36:33 UTC

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