Add lightbox to image feed

js/common/utils.js

@@ -0,0 +1,27 @@
+import { $el } from "/scripts/ui.js";
+
+export function addStylesheet(url) {
+	$el("link", {
+		parent: document.head,
+		rel: "stylesheet",
+		type: "text/css",
+		href: url.startsWith("http") ? url : getUrl(url),
+	});
+}
+
+export function getUrl(path, baseUrl) {
+	if (baseUrl) {
+		return new URL(path, baseUrl).toString();
+	} else {
+		return new URL("../" + path, import.meta.url).toString();
+	}
+}
+
+export async function loadImage(url) {
+	return new Promise((res, rej) => {
+		const img = new Image();
+		img.onload = res;
+		img.onerror = rej;
+		img.src = url;
+	});
+}