How to implement large, medium and small fonts in app embedded pages?

at present, the page is laid out in rem, how to implement large, medium and small fonts?

Mar.24,2021

adjusting font size for iOS, itself only changes the css property of body, so it can be controlled by overriding the style.

body {

-webkit-text-size-adjust: 100% !important;

}

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css3 can be measured as a percentage.
just set it up.


Inner fonts use em to adjust the outermost font size than body

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