Get the enhanced image source for imgs loaded via `@sveltejs/enhanced-img` for preloading

getEnhancedImgUrls.ts

import type { Picture } from 'vite-imagetools';

/**
 * Get the enhanced image source for imgs loaded via `@sveltejs/enhanced-img`,
 * often for preloading. Use sparingly!
 */
export function getEnhancedImgUrls(picture: Picture, type: 'avif' | 'png' | 'webp'): string[] {
	if (!(type in picture.sources)) return [];
	const srcset = picture.sources[type];
	const urls: string[] = [];
	for (const src of srcset.split(',')) {
		const [path] = src.trim().split(' ');
		if (!path) continue;
		urls.push(path);
	};
	return urls;
}