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Comment by untog | Hacker News Reader

Most of the sites employing this are aiming at providing more "app-y" experiences, though - and apps don't allow you to zoom in that way. I'd love to see browsers allow you to tap into OS-level accessibility settings easily, and set the font size to match the OS, etc.

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There is truth to that, but there are also publications and other sites who shouldn't be doing it. And they do it so they can put their stupid bar across the top of the page and crap like that.

That's weird. I could have sworn it should work to avoid setting an absolute font size, but trying it just now on my Android phone (kitkat, I think) and it didn't work. Is this something I'm misremembering? I thought you could do this on desktop, at least.

iOS 9 added that https://webkit.org/blog/3709/using-the-system-font-in-web-co...

But not sizing specifically, right? It looks like I can use the system typeface but not my own typeface at system size.

It looks like it supports sizing:

> "Going beyond the system font, iOS has dynamic type behavior, which can provide an additional level of fit and finish to your content. These text styles identify more than simply a particular font family; instead, they represent an entire style, including size and weight. "

Note that "dynamic type" in Apple vernacular refers specifically to the variable-sizing accessibility feature, so I'm pretty sure this does what you'd want.

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