japgolly.scalajs.react.vdom.HtmlStyles
The font-size CSS property specifies the size of the font – specifically the desired height of glyphs from the font. Setting the font size may, in turn, change the size of other items, since it is used to compute the value of em and ex Length units.
Larger than the parent element's font size, by roughly the ratio used to separate the absolute size keywords above.
Smaller than the parent element's font size, by roughly the ratio used to separate the absolute size keywords above.
The font-size CSS property specifies the size of the font – specifically the desired height of glyphs from the font. Setting the font size may, in turn, change the size of other items, since it is used to compute the value of em and ex Length units.