`font-display` for the Masses
Updated on January 12, 2017: Proper support checks are now part of the article body. Added information about the block value. Minor tweaks and copy edits. Enjoy!
If you’re a regular reader here at CSS-Tricks, chances are good you know a bit about web fonts. You may even know a few useful tricks to control how fonts load, but have you used the CSS font-display property?
The font-display property in CSS is available in Chrome, and emerging in Firefox and Safari (but you might want to check browser support for yourself, since things change all the time). It’s a simpler way of achieving what the Font Loading API is capable of, as well as third party scripts such as Bram Stein’s Font Face Observer.
Browsers are carefully crafted programs, and they do a lot under the hood we may not suspect. Font loading is no exception to this rule. When a browser requests a font asset from a web server, any elements with styles invoking that font is hidden until the font asset has downloaded. This is known as the “Flash of Invisible Text,” or FOIT.
This behavior is there to “save” us from seeing text initially render in a system font, only to swap to the custom typeface once it has loaded. That behavior is known as the Flash of Unstyled Text, or FOUT.
