- From: Patrick H. Lauke <redux@splintered.co.uk>
- Date: Mon, 27 Apr 2026 23:14:32 +0100
- To: w3c-wai-ig@w3.org
On 27/04/2026 22:29, Hash, Colton wrote: > So to my understanding, a web page could pass SC 1.4.4 if it can scale > up to 200% with full-page zoom in a 1280px wide window, even if font- > only zoom up to 200% does not work? > *This suggests that accommodating font-only zoom is not necessary?* Correct. These days, full-page zoom is by far the most common way of resizing text. To my knowledge, only Firefox and Safari still have a text-only zoom. In the case of Firefox, the option is exposed in the View menu (noting that on Windows, the traditional menu bar is hidden by default, and there's no equivalent function in Firefox's "hamburger" type menu) and in the Settings. In Safari, it appears that the option is completely hidden and only available via the (undocumented?) Option+Command+plus/minus keyboard shortcut (where regular Command+plus/minus is full-page zoom). > For mobile devices, users also need to be able to increase font size by > 200% with device or browser settings. Scaling a 320px wide mobile device > viewport by 200% full-page zoom without scrolling would effectively mean > that all layouts would have to scale down to 160px wide? Careful, browsers on mobile/tablet OSs don't change viewport size when zooming (instead, they use a secondary layout viewport that is set once the page is rendered, and pinch/zooming zooms into this layout viewport, so the page width/height do not change and instead you scroll horizontally/vertically ... and again, for the purposes of 1.4.4, this is fine). > Taken with SC 1.4.10, I assume that a mobile browser should not scroll > in 2 dimensions with browser scaling up to 200%, even though page > content is technically below the 320px wide threshold stated in SC 1.4.10? Once the user pinch-zooms and the browser itself causes horizontal and vertical scrolling, that's outside of the author's control, so irrelevant for 1.4.10. -- Patrick H. Lauke * https://www.splintered.co.uk/ * https://github.com/patrickhlauke * https://flickr.com/photos/redux/ * https://mastodon.social/@patrick_h_lauke
Received on Monday, 27 April 2026 22:14:41 UTC