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Re: Is there any industry agreed viewport to verify 1.4.4: Resize Text

for

From: Steve Green
Date: Nov 20, 2023 11:44PM

The physical size of the screen does not matter - it's the screen resolution that matters, and also the scaling factor in Display Settings.

My view is that we should test using screen sizes that users will have. 1920x1080px seems reasonable. Higher resolution screens are available, but I don't think they are common. If you have a screen of that size, you can also test at any lower resolution.

The scaling factor isn't so obvious. It only became an issue when laptops with physically small screens started to have high resolution. It's not an issue for me because I always use a large screen (usually 27"), but my inclination would be to always use a scaling factor of 100% regardless of screen size. And why would testing be done on tiny 14" screens? That's inefficient and more prone to error than a large screen. Testers (and everyone else) should insist on having the equipment they need to do the job properly and should not just accept what they are given.

You obviously can't test at every possible browser window size, so I typically test thoroughly at a width of 1280px because I'm using that for Reflow. Then I look at how the layout changes as I increase the width to 1920px. I test at that width and maybe at intermediate widths if it looks like there might be issues.

I also check what happens when the window width is reduced all the way down to then the mobile layout kicks in. This isn't a comprehensive test, but it's just to get an understanding of the design and see if anything nasty is likely.

Steve Green
Managing Director
Test Partners Ltd


-----Original Message-----
From: WebAIM-Forum < <EMAIL REMOVED> > On Behalf Of Mohith BP
Sent: Tuesday, November 21, 2023 6:10 AM
To: WebAIM Discussion List < <EMAIL REMOVED> >
Subject: Re: [WebAIM] Is there any industry agreed viewport to verify 1.4.4: Resize Text

Thank you Patrick for the response.
However there will be non-standardized results when tested with laptops having different screen sizes.
i.e., QA testing on a 14 inch display may get some issues which are documented and a dev using a bigger screen or at times external high-resolution monitors may not see those issues.
Couple of organizations follow 1280 px as a standard for 1.4.4 assessment as well. I have come across a few organizations having different requirements for viewport something around 1366.
I wanted to understand do we have any agreement as a community or any best practices for these.

Thanks & Regards,
Mohith


On Thu, Nov 16, 2023 at 10:12 PM Patrick H. Lauke < <EMAIL REMOVED> >
wrote:

> On 16/11/2023 16:24, Mohith BP wrote:
> > Hi All,
> >
> > Would like to know if there is any specific viewport generally
> > agreed to verify 1.4.4: Resize Text.
> > Different screen sizes and resolutions always produce different results.
> > WCAG specifically mentions 320 px or 400% zoom at 1280 px for 1.4.10.
> > However there is no mention of viewport requirement for 1.4.4.
> >
> > Generally many organizations follow a 1280 px viewport for both 1.4.4:
> > Resize Text and Success Criterion 1.4.12 Text Spacing.
> >
> > Would like to know if there is any consensus on this.
>
> Normatively, 1.4.4 applies at all possible screen/viewport sizes. At
> any of them, you must be able to resize text (whether in isolation, or
> as part of resizing all content/zooming) to 200% its original size.
>
> P
> --
> Patrick H. Lauke
>
> https://www.splintered.co.uk/ | https://github.com/patrickhlauke
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>
> > > archives at http://webaim.org/discussion/archives
> >