CSS Font Size
Firstly, we should consider the various methods of specifying a font size using CSS. 4 CSS attributes pertaining to font sizing come to mind:
- percentage – ‘%
For the purpose of this article, treat ‘em’ and ‘%’ as the same (where 1em is equivalent to 100%). When we allow visitors to change the font size, only elements with a font size set in ‘em’ or as a percentage will be variable. Elements without this attribute fall back to the value of their immediate parent element’s font-size. This means is that if you specify the value for an element’s font size in pixels, the font size will not change.