Durable by default
Automatic reconnection with full-jitter backoff and bounded message queueing — on out of the box. Opt-in heartbeat closes quietly-dead links. Every dropped message is observable; nothing is silently lost.
DurableWS
The WebSocket client that survives the real world — automatic reconnection, bounded queueing, and typed messages. Zero dependencies, every modern runtime.
Typed end to end
Pass any Standard Schema (zod, valibot, arktype, …) and inbound messages are inferred and runtime-validated before your handlers see them.
Vue & React in the box
A composable and a hook as subpath exports with optional peers — reactive connection state, automatic cleanup, one install.
Drop-in compatible
durablews/compat is a WebSocket-shaped class:
swap it into existing code or inject it as a library’s
webSocketImpl — with a published known-deviations table.
Zero dependencies
Built on the standard global WebSocket. No ws, no bloat. Browsers,
Node ≥22, Deno, Bun, and the edge.
Extensible where it counts
Middleware in both directions (async-safe, auth-ready) and a pluggable codec for custom wire formats.