Function getFaceKey

packages/core/src/processor.ts:221–233

(
		face: Pick<
			FontFace,
			'subset' | 'weight' | 'style' | 'axisKey' | 'sliceIndex'
		>,
	)

	// Generate a unique key for each face based on its defining properties.
	const getFaceKey = (
		face: Pick<
			FontFace,
			'subset' | 'weight' | 'style' | 'axisKey' | 'sliceIndex'
		>,
	) =>
		[
			face.subset,
			face.weight,
			face.style,
			face.axisKey ?? '',
			face.sliceIndex,
		].join('|');

	// Export fonts for each axis combination and build corresponding CSS faces.
	const fontAssets: FontAsset[] = [];