I have been spending time investigating how I can change a mobile web page to honor dynamic type. The end goal is to have a web page embedded in our iOS app in a WKWebView honoring the dynamic font classes, but for now, I have been making changes to the mobile web page and looking at them in Safari so I can debug.
I was running my tests on an iPhone X device running iOS 11.1.2 and was not seeing Safari honoring the -apple-system-body font property specified in the page. I spent a ton of time trying to figure out why and decided to look at the page on another iPhone running an iOS 11.2 beta and I see the page honoring the font class.
I did a web search and I could not find anything related to this problem, so I figured I would ask here.
Thanks in advance!
Apple documentation for Dynamic Type support font properties: