CSSFontFeatureValuesRule
The CSSFontFeatureValuesRule
interface represents an @font-feature-values
at-rule, letting developers assign for each font face a common name to specify features indices to be used in font-variant-alternates
.
Instance properties
Inherits properties from its ancestor CSSRule
.
CSSFontFeatureValuesRule.fontFamily
-
A string that identifies the font family this rule applies to.
Instance methods
Inherits methods from its ancestor CSSRule
.
Examples
Read font family
In this example, we declare two @font-feature-values
one for the Font One font family, and the other for Font Two. We then use the CSSOM to read these font families, displaying them into the log.
HTML
html
<pre id="log"></pre>
CSS
css
/* At-rule for "nice-style" in Font One */
@font-feature-values Font One {
@styleset {
nice-style: 12;
}
}
/* At-rule for "nice-style" in Font Two */
@font-feature-values Font Two {
@styleset {
nice-style: 4;
}
}
/* Apply the at-rules with a single declaration */
.nice-look {
font-variant-alternates: styleset(nice-style);
}
JavaScript
js
const log = document.getElementById("log");
const rules = document.styleSheets[document.styleSheets.length - 1].cssRules;
const fontOne = rules[0]; // A CSSFontFeatureValuesRule
log.textContent = `The 1st '@font-feature-values' family: "${fontOne.fontFamily}".\n`;
const fontTwo = rules[1]; // Another CSSFontFeatureValuesRule
log.textContent += `The 2nd '@font-feature-values' family: "${fontTwo.fontFamily}".`;
Specifications
Specification |
---|
CSS Fonts Module Level 4 # cssfontfeaturevaluesrule |
Browser compatibility
BCD tables only load in the browser