Function imgSrc

exercises/06.optimization/02.solution.cache/utils.tsx:46–50

(src: string)

const imgCache = new Map<string, Promise<string>>()

export function imgSrc(src: string) {
	const imgPromise = imgCache.get(src) ?? preloadImage(src)
	imgCache.set(src, imgPromise)
	return imgPromise
}

function preloadImage(src: string) {
	return new Promise<string>(async (resolve, reject) => {