[Webkit-unassigned] [Bug 230348] AX: Why does -apple-system-body default to 13px on macOS?

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=230348

--- Comment #4 from Šime Vidas <sime.vidas at gmail.com> ---
The problem is that on every other platform and browser, the default font size is 16px, so if I use em or rem units to increase the font-size for desktop Safari, it will be too big in all other browsers.

  html {
    font: -apple-system-body;
  }

  body {
    font-size: 1.2307692rem;
  }

With this code, the font-size will by default be exactly 16px in desktop Safari but 19.69px in all other browsers (including iOS Safari!). The only way to get a consistent 16px across all browsers seems to be to detect desktop Safari and add the body font-size: 1.2307692rem increase to that browser only.

Since there is no “Larger text” accessibility setting on macOS, I think it would be best if font: -apple-system-body was just ignored and didn’t result in a font-size decrease to 13px.

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