The CSSFontPaletteValuesRule interface represents an @font-palette-values at-rule.

Inherits properties from its ancestor CSSRule.

CSSFontPaletteValuesRule.name Read only

A string with the name of the font palette.

CSSFontPaletteValuesRule.fontFamily Read only

A string indicating the font families on which the rule has to be applied.

CSSFontPaletteValuesRule.basePalette Read only

A string indicating the base palette associated with the rule.

CSSFontPaletteValuesRule.overrideColors Read only

A string indicating the colors of the base palette that are overwritten and the new colors.

Inherits methods from its ancestor CSSRule.

This example first defines an @import and an @font-palette-values at-rule. Then it reads the @font-palette-values rule and displays its name. As these rules live in the last stylesheet added to the document, the palette will be the second CSSRule returned by the last stylesheet in the document (document.styleSheets[document.styleSheets.length-1].cssRules). So, rules[1] returns a CSSFontPaletteValuesRule object, from which we can access fontFamily.

HTML

<pre id="log">The @font-palette-values at-rule font families:</pre>

CSS

@import url(https://fonts.googleapis.com/css2?family=Bungee+Spice);

@font-palette-values --Alternate {
  font-family: "Bungee Spice";
  override-colors:
    0 #00ffbb,
    1 #007744;
}

.alternate {
  font-palette: --Alternate;
}

JavaScript

const log = document.getElementById("log");

const rules = document.styleSheets[document.styleSheets.length - 1].cssRules;
const fontPaletteValuesRule = rules[1]; // aA CSSFontPaletteValuesRule interface
log.textContent += `${fontPaletteValuesRule.fontFamily}`;

Result

• @font-palette-values