How to test for WCAG 2.1 SC 1.4.10 Reflow - Level AA?

Hi All,

I'm wondering if others have tips on how to best test for SC 1.4.10 Reflow - Level AA in WCAG 2.1?

For my testing I've been using Firefox.  I resize the Firefox browser window on my desktop to 320 pixels wide for vertically-oriented content, then check to see if both vertical and horizontal scrolling is required.  If both dimensions are required, I fail the page unless horizontal scrolling is required due to requirements of the content (complex tables, content that has to wider than 320 pixels to preserve meaning and/or functionality, etc.).   I also check to see if all of the content and functionality that was available at the full desktop viewport size is available in the 320 pixel wide version.  If not, that's a failure.

I've found that the responsive mode in Firefox set to 320 pixels for vertical content also works to perform this test.  In Firefox, I get into responsive mode by choosing Ctrl+Shift+M.  Do both the manual resizing and responsive design testing approaches in Firefox meet the intent of the Reflow Success Criterion?

I've noticed that my desktop version of Chrome does not allow me to resize the browser viewport below 500 pixels, which makes it impossible for me to perform the Reflow test by manually adjusting the browser viewport dimensions down to 320 pixels.  I've also noticed that the responsive design mode in Chrome doesn't return reliable results, in terms of showing both vertical and horizontal scroll bars at 320 pixels for content that forces two dimensional scrolling Firefox.  So, I'm not using Chrome now to perform Reflow testing.

Any others have insights about how to best perform tests for SC 1.4.10 Reflow?

Thanks!

Brooks

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Brooks Newton
Sr. Accessibility Specialist

Thomson Reuters
the answer company

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