
320px for iPhone5/SE) does not produce the same layout as 400% Zoom from 1280px on the desktop. The DevTools function in Chrome to view the page at different device sizes (e.g. So the option of setting the viewport width with Firefox > Web Developer Toolbar > Resize to 320px (or 336px when accounting for the scrollbar) fails to show the page at the desired viewport width because the browser does not support such narrow widths.

With Edge, you can get down to a clientWidth of 355. Using the CSS declarations such as word-wrap: break-word on in small viewports will help to avoid horizontal scrolling at all.The common desktop browsers do not support narrowing the viewport width to 320px: Firefox stops at a clientWidth (viewport width minus scrollbar width) of 435px and Chrome at 483. Use of formatted content (such as code) can cause horizontal scrolling.Using fixed sized containers and fixed position content (CSS).

Horizontal scrolling appears in both directions at some low resolutions when content is zoomed.Content does not reflow to a single column when zoomed.On smaller devices or when content is zoomed there should be no loss of information or functionality, and users should not be required to scroll content both vertically and horizontally.Make sure users can access all information and functionality on a screen that’s as wide as on the iPhone5, without needing to scroll in both directions.Scrolling can often be difficult for some disabled users, more so when horizontally or both horizontally and vertically at the same time.People who are sight impaired often use screen magnification to resize page content and this can cause info to get lost.Everyone benefits when all content is easily viewed on a mobile device. People with mobility issues may have difficulty scrolling in more than one direction. It is easier for for people who enlarge text to read word-wrapped text line by line rather than scrolling back and forth across long lines of text. Research shows that horizontal scrolling significantly reduces reading comprehension. Users with low vision who need to make the content larger benefit when the layout adjusts.
#WCAG REFLOW MAC#
You can zoom in on a Mac in Chrome by pressing Command and + key, until you see the resolution hit 400%.A simple browser based test is to view the page with a viewport width of 320px, or 1280px at 400% zoom.Make sure your pages are responsive and the content will ‘reflow’ to a single column gracefully.


