mine-dapp-wasm/chainfabric/node/Connect

node.go

// Connect connects node to remote server via TCP
func (nd *Node) Connect() bool {
	// connect to this socket
	nd.ws = js.Global().Get("WebSocket").New(fmt.Sprintf("ws://%s:%d/ws", nd.toIP, nd.toPort))

	nd.ws.Call("addEventListener", "open", js.FuncOf(func(this js.Value, args []js.Value) interface{} {
		return nil
	}))
	nd.ws.Call("addEventListener", "message", js.FuncOf(func(this js.Value, args []js.Value) interface{} {
		message := args[0].Get("data").String()
		fmt.Println("message received ")
		fmt.Println(message)
		flds := strings.Fields(message)
		if flds[0] == "TRANSACTION" {
			// execute callback to start mining
			nd.newTransactionCallback(flds[1])
		} else {
			// receive nonce from tracker
			nd.response = message
		}
		return nil
	}))
	return true
}