Defines the source of a font face, either a URL to an external resource or a
buffer, and font properties such as style, weight, and so on. For URL
font sources it allows authors to trigger when the remote font is fetched
and loaded, and to track loading status.
Defines the source of a font face, either a URL to an external resource or a buffer, and font properties such as
style,weight, and so on. For URL font sources it allows authors to trigger when the remote font is fetched and loaded, and to track loading status.See
https://developer.mozilla.org/docs/Web/API/FontFace