A fallback font is a font to use as a substitute if the chosen font does not contain the requested characters. Using font fallbacks means that the user doesn't have to worry about mixing characters from different scripts or mixing text and emojies. Fallback is calculated for the full string and the result is platform specific. If no font covers all the characters in the string an undefined "best match" is returned. The best approach is to figure out which characters are not covered by your chosen font and figure out fallbacks for these, rather than just request a fallback for the full string.
Usage
font_fallback(
string,
family = "",
italic = FALSE,
weight = "normal",
width = "undefined",
path = NULL,
index = 0,
variation = font_variation(),
bold = deprecated()
)
Arguments
- string
The strings to find fallbacks for
- family
The name of the font families to match
- italic
logical indicating the font slant
- weight
The weight to query for, either in numbers (
0
,100
,200
,300
,400
,500
,600
,700
,800
, or900
) or strings ("undefined"
,"thin"
,"ultralight"
,"light"
,"normal"
,"medium"
,"semibold"
,"bold"
,"ultrabold"
, or"heavy"
).NA
will be interpreted as"undefined"
/0
- width
The width to query for either in numbers (
0
,1
,2
,3
,4
,5
,6
,7
,8
, or9
) or strings ("undefined"
,"ultracondensed"
,"extracondensed"
,"condensed"
,"semicondensed"
,"normal"
,"semiexpanded"
,"expanded"
,"extraexpanded"
, or"ultraexpanded"
).NA
will be interpreted as"undefined"
/0
- path, index
path and index of a font file to circumvent lookup based on family and style
- variation
A
font_variation
object or a list of them to control variable fonts- bold