Variable fonts

Last decade the web has been catching up with print. The advent of better delivery formats for type (WOFF(2)) and the rise of services such as Typekit and Google Fonts made the web for typography as interesting as print. But now a new specification is gaining popularity, and it may make the web more interesting than print: variable fonts.

Some background: In word processors you can typically choose between a few basic type variants Bold, Italic and Bold Italic. Some types appear with a 'Black' or 'Light' version in the font list. More professional products for graphic professionals (think Illustrator, Indesign, QuarkXpress), paired with a complete font-family, are, however able set type using 'font-weight'. While CSS has a font-weight-property, offering 'variable' weights (typically rounded to the nearest 100) to a web page would make that page load much slower. …