CSSFontPaletteValuesRule: fontFamily property

<pre id="log">
The @font-palette-values at-rule's applies to the font families:</pre
>

@import "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;
}

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

const rules = document.getElementById("css-output").sheet.cssRules;
const fontPaletteValuesRule = rules[1]; // a CSSFontPaletteValuesRule interface
log.textContent += ` ${fontPaletteValuesRule.fontFamily}`;