Yes!

Our frontend is currently SolidJS written in TypeScript:https://github.com/MutinyWallet/mutiny-web

All of the lightning-related libraries are written in rust and binded to typescript, ie, the package I linked above is here on npm: https://www.npmjs.com/package/@mutinywallet/mutiny-wasm

We have a dev chat room on Matrix if you wanna join and contribute to the conversation or code: https://matrix.to/#/#mutiny-community:lightninghackers.com

Would be happy for other contributors, we are pretty much doing everything in the open so check out the github project boards and milestones on the repos.