This works: https://github.com/fiatjaf/nostr-wasm
Discussion
Explain it like you're talking to someone who wants to post this on the Nostr Report but has no clue why it's important...
It's just another JavaScript library for signing and verifying signatures of Nostr events, this time using the C library libsecp256k1 compiled to WebAssembly so it runs in the browser. Supposedly it will be faster than the pure JS library most people are using.
Awasming!