JavaScript / TypeScript

Two npm packages share one repository:

Package	Use it for
@wsrpc/server	Node.js 22+ RPC servers with HTTP, Express or Fastify
@wsrpc/client	The existing browser client and typed Node.js client

The original browser API is preserved. Servers, Node clients and reusable route classes use ESM with TypeScript declarations. Both npm packages are released from the same GitHub Release in wsrpc-ts.

• JavaScript / TypeScript quick start
  • Install
  • Start the server
  • Connect a Node client
• JavaScript / TypeScript clients
  • TypeScript / Node.js
  • Browser
  • Browser contracts in TypeScript
  • Observe browser payloads
• Portable core and Workers
  • Cloudflare Worker
• Routes and TypeScript API
  • Install from a checkout
  • Register methods and serve connections
  • Typed calls and callbacks
  • Route classes and connection state
  • Pre-created routes and implicit context
  • Events, binary frames, signals and broadcast
  • Authorization and limits
  • Errors and JSON codecs
  • Verification and development

Python servers and clients have their own Python guide. They remain compatible over the shared protocol.