wizicon

The favicon is the toast.

import { wizicon } from "wizicon";

wizicon.loading();          // animated spinner ring
wizicon.success();          // green check, auto-restores
wizicon.error();            // red X, auto-restores
wizicon.notify(3);          // unread badge with count
wizicon.set({ emoji: "🎉" });
wizicon.dismiss();          // restore original

await wizicon.promise(uploadFile());

Zero deps. Works in any browser. SSR-safe (all methods are no-ops on the server). Auto-detects your existing favicon, or pass one explicitly:

wizicon.configure({ logo: "/logo.svg", theme: "auto" });