@jsonjoy.com/reactive-rpc/lib/server/ws/codec/constants.d.ts

Reactive-RPC is a library for building reactive APIs over WebSocket, HTTP, and other RPCs.

export declare enum WsFrameOpcode {
    CONTINUE = 0,
    TEXT = 1,
    BINARY = 2,
    MIN_CONTROL_OPCODE = 8,
    CLOSE = 8,
    PING = 9,
    PONG = 10
}