html - Is there a way to make CSS (and browser) use system's version of a font if it exists, otherwise font-face? -

i want use font (and have browser download it) if os browser on doesn't have font built in. possible?

currently, define font @font-face causes broswer download font automatically. want happen if font not on system.

in @font-face, specify local source, e.g.

@font-face {     font-family: open sans;     src: local('open sans'), url('../fonts/open-sans.woff') format('woff'); }

note users may have broken local fonts.