QuickBEAM is a JavaScript runtime embedded inside the Erlang/OTP VM. If you’re building a full-stack app, JavaScript tends to leak in anyway — frontend, SSR, or third-party code. QuickBEAM runs that JavaScript inside OTP supervision trees. Each runtime is a process with a Beam global that can:

• call Elixir code
• send/receive messages
• spawn and monitor processes
• inspect runtime/system state It also provides browser-style APIs backed by OTP/native primitives (fetch, WebSocket, Worker, BroadcastChannel, localStorage, native DOM, etc.). This makes it usable for:
• SSR
• sandboxed user code
• per-connection state
• backend JS with direct OTP interop Notable bits:
• JS runtimes are supervised and restartable
• sandboxing with memory/reduction limits and API control
• native DOM that Erlang can read directly (no string rendering step)
• no JSON boundary between JS and Erlang
• built-in TypeScript, npm support, and native addons QuickBEAM is part of Elixir Volt — a full-stack frontend toolchain built on Erlang/OTP with no Node.js. Still early, feedback welcome.

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