Created
March 10, 2022 15:03
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CSS for supporting iOS accessibility text size
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| (function() { | |
| var ua = navigator.userAgent, | |
| d = document.documentElement, | |
| classes = d.className; | |
| // Replace 'no-js' class name with 'js' (optional) | |
| classes = classes.replace('no-js', 'js'); | |
| // Detect iOS user-agent string | |
| // http://stackoverflow.com/questions/9038625/detect-if-device-is-ios/9039885#9039885 | |
| if (/iPad|iPhone|iPod/.test(ua) && !window.MSStream) { | |
| classes += ' is-ios'; | |
| } | |
| // Apply classes to <html> element | |
| d.className = classes; | |
| })(); |
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| // Support iOS accessibility text size | |
| // Note: Only apply on iOS due to bug with Safari 14 on Big Sur | |
| // https://webkit.org/blog/3709/using-the-system-font-in-web-content/ | |
| // https://www.interactiveaccessibility.com/blog/text-resizing-web-pages-ios-using-dynamic-type | |
| // https://dev.to/colingourlay/how-to-support-apple-s-dynamic-text-in-your-web-content-with-css-40c0 | |
| // https://gist.github.com/colingourlay/d95908ec5cd4854c7a5afa06f3989479 | |
| html.is-ios { | |
| @supports (font: -apple-system-body) { | |
| font: -apple-system-body; | |
| } | |
| } | |
| // Set the desired font-family on <body> since we’re applying “-apple-system-body” on <html> | |
| body { | |
| font-family: "My Custom Font", -apple-system, BlinkMacSystemFont, Segoe UI, sans-serif; | |
| } |
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