astro/dist/assets/fonts/core/get-or-create-font-family-assets.js

Astro is a modern site builder with web best practices, performance, and DX front-of-mind.

export function getOrCreateFontFamilyAssets({ fontFamilyAssetsByUniqueKey, logger, bold, family }) {
	const key = `${family.cssVariable}:${family.name}:${family.provider.name}`;
	let fontAssets = fontFamilyAssetsByUniqueKey.get(key);
	if (!fontAssets) {
		if (Array.from(fontFamilyAssetsByUniqueKey.keys()).find((k) => k.startsWith(`${family.cssVariable}:`))) {
			logger.warn("assets", `Several font families have been registered for the ${bold(family.cssVariable)} cssVariable but they do not share the same name and provider.`);
			logger.warn("assets", "These families will not be merged together. The last occurrence will override previous families for this cssVariable. Review your Astro configuration.");
		}
		fontAssets = {
			family,
			fonts: [],
			collectedFontsForMetricsByUniqueKey: new Map(),
			preloads: []
		};
		fontFamilyAssetsByUniqueKey.set(key, fontAssets);
	}
	return fontAssets;
}